Coordinate measuring machine

0001The invention relates to a coordinate measuring machine for measuring a three-dimensional, positionable on a measuring table workpiece, with a measuring head, with the workpiece is relatively scanned for measuring table in three spatial directions, and with a first, on two parallel guide rails in a first spatial direction movable support means for the measuring head; said support means guiding elements having, along which the measuring head in at least one other, perpendicular to the first Spatial direction is movable.

0002Coordinate measuring machines are in the industrial manufacturing process or to Quality assurance used to measure workpieces precisely in three dimensions. In conventional coordinate measuring machines typically is a spatially fixed base axis (The so-called X-axis) in its stationary mounting with a rigid foundation or another rigid body, such as a slab of granite, combined. But there are also Tree shapes are known in which it is attached to a beam which in turn with a connected rigid foundation. In addition, it is known, the above mentioned basic axis with to connect the ground of a building, securing it to the ceiling of a building or hang them on supports.

0003All these known approaches have in common that the rigidity of the coordinate measuring machine toward the base axis by the rigid foundation or a rigid Foundation body is determined because the basic axis substantially even in its embodiment is less rigid. Therefore, when the coordinate measuring machines are to be realized in which the basic axis, is located in different positions depending on the application, so must the given above considerations individually be taken into account. This requires each individual case a very complex and complicated calculation of the support and Mounting structures for the basic axis. Known coordinates measuring machines include z. As a portal-like frame and a measuring table, which frame a to scan the on the measuring table lying workpiece serving measuring head transmits, by means of which the workpiece in three mutually perpendicular directions in space is relatively scanned the measuring table.

0004From DE 43 28 533 C2 discloses a coordinate measuring machine is known, in which the measuring head to a the measuring table on a boom whose sides encompassing sitting, which in turn below the measuring table with a movable in three dimensions measuring slide is attached. Here are below the measuring table two horizontally extending, parallel Y-guides mounted, on which a Y-slide is displaceably arranged, respectively. The two Y carriage are connected by a horizontal, perpendicular to the Y-guides arranged X-guide connected, on a movable X-slide is seated, in turn, a vertical Z-guide contributes in the form of a guide column. The measuring table is by means of a frame with a Foundation is connected. The overall arrangement of the multi-angled extension arm thereof in connection with the guides of the measuring table below and the gripping leads to the appearance very considerable bending and tilting moments not only to the angular points of the boom, but also to the guides of the measuring table below, whereby Total occur undesirable bends and twists on the measuring arm, the for can cause corruption of the measurement results.

0005In the coordinate measuring machine is known from DE 693 10 008 T2 is at an end the measuring table an upwardly support in the form of an aluminum plate existing box attached, which is open on its underside to the table surface. The side walls of this box and its remote back the measurement table are of flat aluminum sheets formed. The panels of the two side walls are joined at their the Measuring table ends facing each triple bent at right angles, whereby Angle upwardly extending, almost rectangular in cross-section Endverstärkungsprofile arise. On its front side facing the measuring table, the box is a closed front aluminum sheet at one of the lateral Endverstärkungsprofile Side walls is fixed, while the other by sliding spring clips is connected, so that a relative movement between those of Endverstärkungen has side panels free of stress possible when a construction boom at the top of the box is attached.

0006This boom structure consists of two on the top of the box at this fixed, mutually parallel extension arms, on which in the measuring table substantially full width overtop. is an intermediate two cantilever arms arranged bridge element comprising on a respective one of the lay-in at both ends an in the longitudinal direction (Y-direction) extending guide rail is displaceable.

0007The bridge member is, in turn, in the transverse direction (X direction) respectively on its front side and also provided on its rear side with a guide rail, on top of each one the Bridge member slides on the upper side of cross-carriage which on its front side one contributes to the measuring table towards and away from moving (in the Z direction) spindle on seated the measuring head. The entire structure is as a lightweight sheet metal or formed aluminum body structure, the total, however, only a relatively low rigidity , such that only the extension arms of relatively short length may be used, as they otherwise due to their weight and seated them on the bridge element cause undesired deformations and thus falsification of the measurement result can cause. It is particularly where the booms carrying Lightweight Case to expect the occurrence of undesirable twists and bends.

0008It is also known, at measuring machines, in which a frame consists of a cast construction is used or polymer concrete, two parallel X-longitudinal guides for a trailer directly be attached to the machine frame, said clamping surfaces for this Linear guides must be edited directly on the machine frame. They embark However, due to the different materials for the rails made of metal thermal and for the frame of a cast or a polymer concrete construction Voltage problems, which is a good functioning of the machine only when used in a relatively low temperature range results, will be unwanted, by the pairing different materials occurring warping and constraints prevent have an adverse effect on the accuracy of the measured values. This coordinate measuring machines therefore be used as a rule only in air-conditioned spaces. Will you use such coordinate measuring machines directly in a production, it is necessary specifically provide for them an enclosure to the ambient temperature conditions keep evenly. However, this results in poor accessibility, because the access to such enclosures the use of locks, etc. due, and leads to a unwanted additional costs and space requirements.

0009Proceeding from this, now, the invention provides it from a coordinate measuring machine propose in-indicated disadvantages of the prior art are largely avoided and are the particularly in a wider temperature range (in the range of about 20 ° C to 40 ° C) can be used, unwanted distortions of the measurement result largely due to temperature influences or torsional or bending stresses be avoided.

0010This is inventively achieved by a coordinate measuring machine with a measuring head, with which the workpiece is relatively scanned for measuring table in three spatial directions, and with a first on two parallel guide rails in a first spatial direction (X-direction) having movable support means for the measuring head, the guide elements, along of which the measuring head at least in another to the first spatial direction perpendicular further Spatial direction (Y-direction, Z-direction) is movable, wherein the guide rails on a inherently rigid base body, in particular in the form of bending and torsion resistant Box beam, are secured, which in turn is attached to a support.

0011The inventive use of an inherently rigid base body, particularly in the form a bending and torsion resistant box girder, for attachment of the two Guide rails for moving the boom in the X direction is first the advantage achieved that not between the guide rails and carrying them element different material combinations must be more, because the materials of Guide rails and the box girder regardless of the material of the element, at said box beam is attached, can be coordinated. Thereby divorce inaccuracies due to different material combinations and it returning falsification of the measurement result in coordinate measuring machine of the present invention out. Preferably, the base body and the box beam is sent directly to a formed on a machine frame support, that is, the machine frame itself fastened.

0012The formation of the box girder as in bending and torsion box beam ensures that the bending and torsional moments generated are absorbed by it readily can without causing the disruptive bends or twists to it and to Guide rails comes. Here, the bending and torsion box beam is due to its Rigidity independently of the ground on which it is fixed, so that such Coordinate measuring machine can also be integrated into almost any one production. In addition, a bending and torsion box girder allows particularly simple and relatively Lay low outlay in terms of particularly great rigidity of the structure, thereby under load a very small deformation of the box girder (and to lets him achieve when utilizing the material properties fixed guide rails).

0013The construction of the flexurally and torsionally rigid box girder can in any suitable manner and Way done. So it can be eg. As formed as a triangular cross-sectional profile, said triangle is formed in particular isosceles or equilateral and in the former case, the guide rails are attached to the two end edges of the base. Very particular preference, however, is as resistant to bending and torsion box girders in a Sectional rectangular, preferably square, used profile. A particularly large Stiffness in conjunction with relatively simple design measures can be at a achieve such a carrier, characterized in that transverse reinforcing struts are provided, which in extend inside obliquely, being remote from its end the measuring table are fastened to a corner area of ​​a side wall of the box girder and at its other End to the opposite corner portion of the front wall and on the other side of the wall extending box beam, further wherein the two guide rails at these two Corner regions of the front wall are mounted on steel plates mounted there and every Brace strut with its one, such a corner portion of the front wall and Sidewall end facing the arranged there steel bar both on the back as well as, at right angles thereto, is supported on the other of steel bar side facing. The transverse reinforcing struts are preferably alternately face diagonal adjacently arranged extending inside the box girder, which directly can be mounted next to each other or with only small distances from one another. Prefers The transverse reinforcement struts in the form of hollow profiles, rods and / or plates are executed, especially of hollow steel sections with a rectangular Cross-section are used.

0014In this way, extremely resistant to bending and with low design cost torsion box girders are used, wherein within such a box girder find both the same as well as different types of transverse reinforcement struts use can.

0015A further preferred embodiment of the invention consists in the fact that between the Transverse reinforcing struts inside the box beam over its entire or interposed substantially entire cross section extending bulkheads that with the respective adjacent transverse reinforcing struts and with the walls of the box girder are connected. This can be still further enhanced flexural and torsional stiffness of the Box girder and thus a remarkable rigidity of the same reach.

0016Since usually the strips for fastening the guide rails are made of steel, it is recommended for thermal reasons, to achieve a uniformly as possible thermal expansion coefficient and the box beam (or its individual to produce elements) made of a same or equivalent steel, so that these parts secured together substantially a same thermal expansion behavior have.

0017The connection of the individual elements of the box girder can be in any suitable type and Way done. for reasons of cost and for reasons of a particularly great flexibility the construction and adjustments, however, it is of great advantage when the box carrier is designed as a welded construction.

0018The inventive coordinate measuring machine takes account of the chosen Structure of the invention in the case of loading a fixing of the guide rails on the measuring table facing the front of the box girder to occur Tension in the upper linear guide and a compressive force on the lower linear guide on Box girder to the deformations occurring in them are small enough that To avoid formation of undesired in the measured values. Since the invention used in bending and torsion box girders due to its great rigidity is completely independent of the element to which it is fixed (eg. as the machine frame), is the coordinate measuring machine according to the invention not only by one compared to the prior of the art relatively simple technical construction, but also of a particularly large Flexibility in terms of design and the possibility of adaptation to certain Applications.

0019A preferred embodiment of the coordinate measuring machine according to the invention consists in that a second support means at said first support means along the from the latter fixed first spatial direction is displaced and a second spatial direction for the determines movement of the measuring head.

0020Advantageously place in case of a portal arrangement of the coordinate measuring machine first and second support means each having a horizontally disposed space direction fixed, where these two spatial directions but turn oriented perpendicular to each other.

0021in coordinate measuring machine of the invention is preferably a third Support means slidably mounted on said second support means along the second spatial direction provided, said third support means includes third spatial direction for the Relative movement of the measuring head determines the measuring table.

0022The established by the third supporting means spatial direction is preferably vertical aligned.

0023A further advantageous embodiment of the coordinate measuring machine according to the invention is for the case of a stator arrangement of this coordinate measuring machine is that the first support means comprises a horizontally disposed space direction and said second support means define a spatial direction vertically lying, in which case therefore the third support means a horizontally aligned spatial direction specifies.

0024In a further preferred embodiment of the invention in an inventive The coordinate measuring machine provided that the individual or more at a existing support devices each have a brake to prevent uncontrolled Movements of a set on the respective carrying means along the same by Spatial direction movable element is arranged. Such brake can be preferably used for an emergency stop if z. B. the current or the voltage fails to in such an emergency (or in another emergency) the then occurring braking distances shorten. Such brake can in any suitable manner and manner are formed, in particular, a design as mechanically effective, spring-operated brake can be used. is very particularly preferably However, each brake designed as a magnetic brake.

0025With advantage can in a coordinate measuring machine according to the invention several Assemblies each having a first formed by an inherently rigid body Supporting device and at least one movable thereon arranged further support means be provided, preferably the modules in pairs opposite each other or are arranged in a row.

0026In contrast to the initially mentioned prior art is in the inventive coordinate measuring machine characterized in that said first supporting body (that is, the Basic axis) is itself already formed inherently rigid, achieved the advantage that it thus on the Stiffness of the foundation, of a possible suspension or other Mounting base of this first support means no longer of primary importance.

0027Thus the invention allows, with one and the same support device (such as a bending and rigid box carrier) Coordinate in many different designs To perform, whether in portal design, in Freiarmbauweise, in post and beam construction or . Other in a construction in which the main axis (X-axis), for example, to a ceiling a room located or even may be in any orientation in space, within the meaning of the terminology of the invention selected in each case then the element to which this Body is attached, as a "prop" is designated.

0028The inventive coordinate measuring machine is therefore suitable especially for a versatile, to suit individual applications optimally adaptable program of coordinate. This applies regardless of whether they are used as or Einzelmeßplatz may be integrated in a conveyor within a production line. About that addition, the invention enables arrangements in which multiple systems take measurements on a workpiece, either in tandem, in Array or the like.

0029The invention is described with reference to the drawing, in principle, by way of example in more detail explained. Show it:<dl tsize="6" compact="compact"><dt>Fig. 1</dt><dd>a perspective view of a coordinate measuring machine according to the invention, obliquely from the front;</dd><dt>FIG. 2</dt><dd>a perspective view of a torsional and bending stiffness box girder with Transverse reinforcing struts and guide rails for a anmontierten inventive coordinate measuring machine;</dd><dt>Fig. 3</dt><dd>a front perspective view of a torsional and bending stiffness according to the invention Box girder with transverse reinforcing struts, bulkheads and attached to it Guide rails, but with the front wall;</dd><dt>Fig. 4</dt><dd>a rear perspective view of the box girder of FIG. 3, with removed Rear wall, and</dd><dt>Fig. 5</dt><dd>a cross section through a box girder according to the invention with mounted transverse reinforcing struts and him guide rails.</dd><dt>Fig. 6</dt><dd>a perspective view (partly broken away) of another embodiment of Box girder according to the invention with side arm and measuring head, and</dd><dt>Fig. 7</dt><dd>a side view of another embodiment of the invention The coordinate measuring machine.</dd></dl>

0030Fig. 1 and Fig. 7 show coordinate measuring machines 1, each with a measuring table 2, on one side of a support 4 high passes that also z. B. by a machine frame, on the measuring table 2 is supported, can be formed.

0031At the upper end of the support 4, a torsion and bending-resistant box girder 8 is fixed respectively, said support 4 and box girders 8 extend over the entire length of the measuring table. 2

0032In the embodiment of FIG. 1 of the torsion and bending resistant box girder 8 so on the support 4 mounted that on its side facing the measuring table 2 side facing 12 two Guide rails 5 (X-linear guides) are fastened, parallel to each other and also are parallel to the surface of the measuring table. 2 In the embodiment of FIG. 7, however, the box girders above mounted on the support 4 that its guide rails 5 on its top 12 'parallel to each other and also parallel to the surface of the measuring table 2 present.

0033On two guide rails 5 a first support means is in the form of a boom 6 movably, one measuring head 3 for measuring a the measuring table 2 clampable workpiece 32 carries (the workpiece 32 is only in FIG. 7 and not in Fig. 1 shown). While the boom 6 in FIG. 1 protrudes forwardly and on the measuring table 2 survives, it extends vertically in the embodiment of Fig. 7 upwards.

0034Along the guide rails 5, the boom 6 are respectively parallel to the surface of the will proceed measuring table in the longitudinal direction (X-direction). 2

0035The boom 6, for its part, as a first support means for supporting and procedures represents the measuring head 3, wear suitable guide elements, through which a second Support means 7 for the measuring head 3 in a different spatial direction (Y- and Z-direction) required to Traversing the boom 6 is perpendicular, is movable. The measuring head 3 is be moved by means of the second support means 7 over the width of the measuring table 2 and in its Height adjustable relative to the measuring table. 2

0036The guide rails 5 are the embodiment of FIG. 1 respectively at the corner the transition between a front wall 12, facing the measuring table 2 here, and both secured in this leading-side walls 11 of the box girder. 8

0037In the embodiment of FIG. 7 of the box girder 8, however, is in a different Space orientation fixed, namely so that its front wall 12 with the guide rails 5 on top, in which case the boom 6 as a second supporting device extends vertically upwards and 3 determined by its guide elements movability of the measuring head in the Z direction becomes.

0038FIG. 2 is a perspective view of a torsional and bending stiffness box girder 8 Transverse stiffeners 9 and two on its front side 12 (in FIG. 1, the measuring table 2 facing) mounted mutually parallel steel strips 5 'for receiving the Guide rails 5 (the latter not shown in Fig. 2). In the drawing FIG. 2 is omitted for ease of illustration, the rear wall of the box support 8.

0039The box girder 8 of Fig. 2 has in cross section a square profile on which the two upper and lower side walls 11, front wall 12 and a (in Fig. 2, however, not shown) of rear wall 11 '(see FIG. FIG. 5) is formed. are inside the box girder 8 oblique transverse reinforcing struts 9, cruciform alternately arranged, ie two each adjacent transverse reinforcing struts 9 are in position here by 90 ° offset from each other aligned (the displacement may also be at an angle other done). They extend diagonally inside the box girder 8, in which in Fig. 2 specifically shown arrangement, their graphic representation explicitly as essential referenced. The arrangement is so selected such that each cross-brace 9 at one of the front wall 12 remote from the end at the local end of an associated Sidewall 11 is supported on this and there welded to her is. At its other, front (Ie, the front wall 12 of the box girder 8 facing) end projects the question Transverse stiffening strut 9 in the local corner region of the box girder 8, which from the top Side wall 11 and the front wall 12 of the box girder 8 and the end portion in this arranged steel strip 5 'is. Here they cross Versteifungsstrebe supports 9 that the Measuring table 2 remote back of the steel strip 5 'and forms on the perpendicular thereto lying bottom of this steel strip 5 '(or, if such a transverse reinforcement struts 9, of run back up to the front bottom: on top of the respective steel strip 5 ') also a support from. With its remaining end faces is the respective Transverse stiffening strut 9 then with both the upper side wall 11, as with the front wall 12 of the box girder 8, preferably, by welding.

0040Otherwise, each steel bar supports 5 '(and thus also the mounted on its guide rail 4), including by form-locking (as Fig. 2 shows), in turn, also against the associated Side wall 11 and the front wall 12 of the box girder 8 from.

0041By such an arrangement of transverse reinforcement struts 9, it is possible not only a excellent stiffening of the box girder 8 as a whole unit or as a closed effect element, but in addition the specific stresses that the Guide rails 5 by the boom 6 (especially in the process and the Fairs) occur particularly effective and targeted support and take.

0042In Fig. 3 is a front perspective view of a torsional and bending stiffness box girder 8 its rear side, also in perspective, and shown in Fig. 4 in which the in Fig. 3 the rear wall omitted for better clarity front wall and in Fig. 4 are. Here, the box girder 8 not only transverse reinforcement struts 9, but additionally also bulkhead walls 10, each perpendicular to its front wall 12 and rear wall 11 'extends and fills the entire internal cross-section of the box girder 8, ie at all their lateral end edges on a respective side surface of the box girder 8 abuts and is (preferably by welding) attached there. At the front of the box girder 8 are again two steel strips 5 'for fastening guide rails parallel to each other appropriate.

0043can be removed easily from FIG. 3 (and as is also shown in FIG. 2 already indicated), the transverse reinforcing struts 9 in the form of rectangular bar profiles (Hollow sections) formed which consist of rectangular steel tube and the ends of each of supported the assigned inner boundary surface of the box girder. 8 The Transverse reinforcing struts 9 are laterally adjacent to each other, after two Transverse reinforcement struts 9 (with alternating slope. See also FIG. 2) each have a Bulkhead 10 and interposed with the accompanying her on both sides is transverse reinforcing struts 9 additionally connected (again preferably by welding).

0044Fig. 5 finally shows a cross section through the box girder according to Fig. 4, wherein the Section lies in the section plane AA, as indicated in Fig. 4.

0045From Fig. 5, the support of the steel plates 5 'is also especially by the respective Transverse reinforcing struts 9 easily recognizable, particularly the rear support each steel bar 5 ', the support perpendicular to it (in the direction of other steel strips 5' out) and also simultaneous support on the front wall 12 and the end portion of the associated Sidewall 11th

0046The fastening of steel strips 5 'on box girders 8 can in any suitable manner done. To support the respective steel strips 5 'is at the corresponding end of each transverse reinforcement struts 9 each have a recess 13 is mounted, so that a positive reception of steel strips 5 'and corresponding recess 13 of the takes place each transverse reinforcing struts. 9 As a result of these recesses 13, the Transverse reinforcing struts 9, the steel strip 5 'in addition to its support to the Sidewalls 11 and 12 are supported.

0047Due to the chosen arrangement, the upper steel strip 5 'and thus also the mounted on it Guide rail 5 from it supporting transverse stiffening struts 9 (ie, those of the run back down diagonally forward and upward) supported such that pulling forces by the weight of the boom 6 and are formed by reaction forces when measuring, is counteracted; on the other hand the lower guide rail 5 is supported by the other Transverse reinforcing struts 9 supported so that compressive forces on the respective guide rail 5 can be well received. For the bulkheads 10 applies similar, but with the Except that each partition wall 10 at the same time the upper and lower steel strip 5 'and Guide rail 5 is supported.

0048As shown in Fig. 5 also shows, the upper steel strip 5 'having a projection 14 in a form-fitting a groove formed on the inside of the upper side wall 11 of the box girder 8 groove 14, wherein a further projection 15 of the upper steel strip 5 ', the front wall 12 of the box beam 8 form-fitting engages behind. This also allows the steel strip 5 'in addition to the support held by the transverse reinforcing struts. 9

0049Similar is the lower steel bar 5 'with a projection 14' in a form-fitting one on the Inside of the lower side wall 11 of the box girder 8 formed groove with a Another projection 15 'of the lower steel strip 5', the front end of the local side wall 11 the box girder 8 form-fitting converted from above and from behind.

0050For material saving and orientation of each transverse reinforcing struts 9 and possibly inserted bulkheads can another 10 in each of which a central be provided holes 16, (not shown) through the z. B. aligning introduced can be. The transverse reinforcing struts 9 and the bulkheads 10 can thereby are successively pushed onto this rod and connected to each other, wherein after the Assembly fixing the transverse reinforcement struts 9 and bulkheads 10, the aligning Will get removed.

0051In a not illustrated embodiment, the coordinate measuring machine according to the invention may be provided in the box girder 8 also transverse reinforcement struts whose Longitudinal axes not perpendicular to the longitudinal axis of the box girder 8, but the z. B. space are arranged diagonally in the interior of the box girder eighth To achieve a large Rigidity, however it is particularly advantageous if it is ensured in any case, that also With such an arrangement the transverse reinforcing struts 9 total symmetric Arrangement of struts inside the box girder 8 is present.

0052Fig. Figure 6 shows in a perspective view in which the box girder 8 on its upper Sidewall 11 is partially broken, again another embodiment of a Box girder according to the invention, namely in the stiffening in the interior only by a plurality of offset in the X direction at small intervals to each other arranged, takes place perpendicular to the X direction bulkheads 10th The arrangement is such, that the inherent rigidity of the box girder 8 with regard to its elastic deformation of all Art is sufficiently large due to the applied forces, that thus the accuracy conventional coordinate measuring machines can be reached at which the stiffness of the Basic axis by a rigid foundation or by rigid foundation body, such as a Granite, is formed.

0053From Fig. 6, also in the here (compared to the illustration of FIG. 1) slightly enlarged Illustration selected some additional details shown: Thus, the guide rails of box girder 8, very schematically, 5 indicated that in itself extend X-direction and parallel to which a likewise only schematically indicated Spindle 20 extends, in the illustrated embodiment, the center between the two Guide rails 5 is arranged.

0054On the guide rails 5 runs by also only schematically shown Slide guides 21, the second support means in the form of the boom 6 through which a second movement axis, in the illustrated arrangement here: the Y-axis, fixed or is pictured.

0055The boom 6 is more stable in the embodiments shown in FIGS. 1 and 6 in running lightweight construction, the arm formed by him mainly by parallel side walls 6 'is formed in which the weight saving recesses 25 are provided. The second support means or the boom 6 tapers in the Side view in the direction of the first support means, namely the box girder 8, away, d. h., in the embodiments shown in FIGS. 1 and 6 in a direction such that it protrudes over the plane table. 2

0056At the bottom 26 of the arm 6 in turn are elements to process a third Support means 7 is mounted in the direction of the second movement axis (Y-axis), of which in Fig. 6, only an extremely schematic second spindle 27 is indicated.

0057The third support unit 7 can by means of this movement, elements in which in Fig. 1 and 6 Embodiment in a third direction of movement, namely in the illustrated in Vertical direction current Z-axis, are moved to the perpendicular to the direction of travel the first support means 8 and also extends to the to the second support means 6, as is represented by the in FIG. 6 only schematically indicated coordinate system (X, Y, Z).

0058Also, the third supporting device 7 consists of a, possibly in a stable lightweight construction trained, self-rigid box with a vertically (Z-axis) extending Recess 22, in which a further, third spindle 23 is seated, with the measuring head 3 in the Z-direction is movable. The measuring head 3 carries at its lower end a conventional Taststiftanordnung 24 admixed with (in the embodiment shown) four each at 90 ° to each other arranged individual pins, the central axes all lie in a horizontal plane.

0059In Fig. 7, as already mentioned, a second embodiment of a coordinate measuring apparatus shown, wherein the arrangement of the box girder 8 (the first support means) is provided, unlike the embodiment of FIG. 1 in space.

0060The illustration of FIG. 7 shows a measuring table 2 with a workpiece support 28 on which a Workpiece 29 is mounted. In addition to the workpiece carrier 28 in which. As it is such a can act or granite plate to a plate made of any other suitable material, is attached to the side as a support 4 a low platform on which the arrangement shown in Fig. 6 is mounted, however, here now in an alignment of the components such that the Guide rails 5 of the box girder 8, which in turn is mounted on the support 4, on the Top of the box girder are 8 and the arm 6 above it, namely vertically is upward, that is aligned in the Z-direction are arranged. Again, run the Guide rails 5, in spite of the other space orientation of the box girder 8, in the X direction So the side parallel to the measuring table 2. Since here the second support means (in the form of Boom 6) in the vertical direction (Z-direction) according to above, this has the consequence that is now the third supporting device 7 (that is, in the Y-direction) oriented horizontally. Thereby forming the second support means 6 here the vertical displacement axis (Z-axis) for the third Carrying means 7 from the latter, the second horizontal axis of displacement, namely, the Y-axis, specifies.

0061This means a total that the machine of FIG. 6, the arrangement shown in Fig. 7, the is rotated in contrast to 90 degrees upward, includes.

0062In the illustration of FIG. 7 is to the vertical spatial axis in a suitable mapping (Z-axis) an only very schematically indicated brake means 30 is provided, which is preferably is a magnetic brake, but also any other, such as spring actuated mechanical braking device may be provided. The brake 30 is prevent, for example, when a fault occurs in the power supply or controller the moving in the vertical direction elements, namely the probe 3 with the Taststiftanordnung 24, can crash in an uncontrolled manner. Also for the other two axes of movement (Here, the X and the Y axis) is the use of such (in Figure 7 is not shown.) Brake assembly also beneficial because they attack in the sense of emergency in case of failure and can ensure that it is the displacement movements of the still occurring various supporting facilities are only very briefly.

0063The frame construction of a coordinate measuring device, as shown in Fig. 7 is suitable, very particularly for realizing systems in which several such Measuring arrangements are combined. Thus, for. Example, the arrangement of FIG. 7 mirrors the Workpiece 29 are complemented by, in the representation in FIG. 7: the right of the workpiece 29, a second such assembly having a first support means, second support means and a third support means is positioned so that these two arrangements z. B. in Tandem operation can work on the same workpiece 29th Similarly, it is conceivable that several such measuring arrangements as the side of the measuring table are shown in Fig. 7, in the same orientation are provided in succession, ie, in a succession arrangement along the Y direction.