CN215248071U - PCB positioning radio-cassette player - Google Patents

Abstract

The utility model discloses a PCB board location radio and tape player, include: the transfer positioning table comprises a base, a guide rod, a sliding supporting block and a fixed supporting block, wherein the guide rod is obliquely arranged on the base, the sliding supporting block is connected with the guide rod in a sliding manner, the sliding supporting block is provided with a first supporting inclined plane parallel to the guide rod, and the fixed supporting block is provided with a second supporting inclined plane and a positioning inclined plane; the screen printing machine comprises a screen printing table top for positioning and placing the PCB; the PCB transferring device comprises a manipulator and a grabbing device, wherein the grabbing device is arranged on the manipulator and can grab or release the PCB, and the manipulator can drive the grabbing device to move back and forth between a transferring and positioning table and a screen printing table surface. This radio cassette player can adapt to the not unidimensional PCB board, guarantees that the position that the PCB board was placed on the silk screen printing mesa at every turn is unified, and printing precision is very high, because first support inclined plane and second support inclined plane only contact with the border of PCB board, can not be stained with the printing ink on the PCB board that the consent was accomplished, and whole process realizes the full automatization, and is very high-efficient.

Description

PCB positioning radio-cassette player

Technical Field

The utility model relates to a screen printing technical field, in particular to PCB board location radio and tape player.

Background

The screen printing technology or simply the screen printing technology has a long history and a mature automatic scheme, so the screen printing technology is widely applied to various industries and has higher requirements on printing precision.

Before the PCB is subjected to vacuum hole plugging, the position and the angle of the PCB are not uniform, so that the position difference of the PCB on the screen printing table surface is large, and a large amount of time is needed for aligning and adjusting the screen printing position; even if the screen printing table top is provided with the auxiliary positioning position of the PCB, the PCB is difficult to accurately place in the auxiliary positioning position when being moved, so that the production efficiency is low, and the printing precision is also influenced; in addition, the PCB board that the vacuum consent was accomplished still need to insert accurately when the unloading and to put the inslot and dry, consequently, an urgent need a set of PCB board location radio cassette player.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a PCB board location jack can collect and place the PCB board, and the location is accurate moreover.

According to the utility model discloses PCB board location radio and tape player, include: the transfer positioning table comprises a base, a guide rod, a sliding support block and a fixed support block, wherein the guide rod is obliquely arranged on the base, the sliding support block is connected with the guide rod in a sliding manner, the sliding support block is provided with a first support inclined plane parallel to the guide rod, the fixed support block is arranged on the base and close to the lower end of the guide rod, and is provided with a second support inclined plane and a positioning inclined plane; the screen printing machine comprises a screen printing table top for positioning and placing the PCB; the grabbing device is arranged on the manipulator and can grab or release the PCB, and the manipulator can drive the grabbing device to move back and forth between the transfer positioning table and the screen printing table surface.

The method has the following beneficial effects: the transfer positioning table of the radio cassette player adjusts the position of the sliding supporting block on the guide rod according to the length of the PCB, so that the distance between the sliding supporting block and the positioning inclined plane is slightly smaller than the length of the PCB, the radio cassette player can adapt to PCBs of different sizes, in the working process, the PCB is placed on the first supporting inclined plane and the second supporting inclined plane and is supported by the first supporting inclined plane and the second supporting inclined plane in the same plane, the lower end face of the PCB can be abutted on the positioning inclined plane by means of self weight, the positioning inclined plane can effectively and accurately position the PCB in the length direction, then the PCB can be moved away by the grabbing device and transferred to the screen printing table surface by a mechanical hand, the positions of the PCB placed on the screen printing table surface at each time are uniform, the printing precision is very high, after vacuum hole plugging is completed, the mechanical hand drives the grabbing device to transfer the PCB to the transfer positioning table and perform positioning again, preparation is made for accurate blanking, and because the first supporting inclined plane and the second supporting inclined plane only contact with the edge of the PCB, ink on the PCB with the plugged holes can not be stained, the whole process is fully automated and is very efficient.

According to some embodiments of the utility model, grabbing device includes mounting bracket, support and press from both sides subassembly and sucking disc subassembly, support press from both sides the subassembly install in for the third direction the one end of mounting bracket, support and press from both sides the subassembly and include at least a pair of centre gripping unit that sets up along second direction interval, the centre gripping unit can be relative the mounting bracket is followed the second direction removes, the centre gripping unit is used for following the third direction centre gripping the PCB board, the sucking disc subassembly for the third direction install in the other end of mounting bracket, the sucking disc subassembly include a plurality of sucking discs, it is a plurality of the sucking disc is in the perpendicular to in the coplanar of third direction, the second direction with third direction mutually perpendicular.

According to the utility model discloses a some embodiments, the silk screen printing mesa is corresponding the border department of PCB board has seted up the first groove of dodging, the centre gripping unit includes solid fixed splint and cylinder, gu fixed splint can stretch into first in the groove of dodging, the piston rod of cylinder can be followed the third direction is flexible in order to cooperate gu the splint centre gripping the PCB board, gu the fixed splint is compared the piston rod of cylinder is in keep away from in the third direction the mounting bracket.

According to some embodiments of the utility model, fixed supporting shoe is provided with V type groove, V type groove by the second support inclined plane with the location inclined plane encloses into, fixed supporting shoe is in the second has been seted up to the below in V type groove and has been dodged the groove, the second dodge the groove with V type groove is linked together.

According to the utility model discloses a some embodiments, the slip supporting shoe is corresponding the second is dodged the position department in groove and has been seted up the third and dodge the groove.

According to some embodiments of the present invention, the mounting bracket includes a main bracket and two side brackets installed at both ends of the main bracket respectively for the second direction, each side bracket is relative the main bracket is in the position adjustable in the second direction.

According to some embodiments of the utility model, hold in the palm and press from both sides the subassembly and include four and be the matrix distribution the clamping unit, wherein two the clamping unit sets up in one of them along first direction interval on the collateral branch frame, two in addition the clamping unit is followed first direction interval sets up in one in the other on the collateral branch frame, the clamping unit can be relative the collateral branch frame is followed the second direction removes, first direction with the second direction the third direction mutually perpendicular.

According to some embodiments of the invention, some of the suckers are installed on the main support, and the other suckers are installed on two of the side supports.

According to the utility model discloses a some embodiments, main support elastic connection has main bottom plate, part the sucking disc distribute in on the main bottom plate, every collateral branch frame elastic connection has the side bottom plate, all the other the sucking disc distribute in two on the side bottom plate.

According to some embodiments of the utility model, be provided with the lead screw on the base and with the drive unit that screw drive connects, the lead screw with the guide bar is parallel, install screw-nut on the fixed support block, screw-nut with the lead screw cooperation is connected.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a transfer positioning table in an embodiment of the present invention;

fig. 4 is a side view of the transfer positioning table according to the embodiment of the present invention;

fig. 5 is a schematic structural view of a gripping device in an embodiment of the present invention;

fig. 6 is a front view of the grasping apparatus in the embodiment of the present invention;

fig. 7 is a schematic view of a partial structure of the side clamp assembly for transferring the PCB board according to the embodiment of the present invention;

fig. 8 is a schematic view of a partial structure of the embodiment of the present invention when the holder assembly and the suction cup assembly transfer the PCB;

fig. 9 is a schematic structural diagram of the blanking frame in the embodiment of the present invention.

Reference numerals: the device comprises a PCB (printed circuit board) 1, a feeding rack 2, a transfer positioning table 3, a base 31, a guide rod 32, a sliding support block 33, a first support inclined surface 331, a third avoidance groove 332, a fixed support block 34, a second support inclined surface 341, a positioning inclined surface 342, a V-shaped groove 343, a second avoidance groove 344, a screw rod 35, a screw rod nut 36, a screen printing machine 4, a screen printing table surface 41, a first avoidance groove 42, a blanking rack 5, an insertion groove 51, a manipulator 6, a gripping device 7, mounting racks 71, 711, a side support 712, a main bottom plate 713, a side bottom plate 714, a side clamp assembly 72, a clamping jaw 721, a clamping assembly 73, a clamping unit 731, a fixed clamping plate 7311, an air cylinder 7312, a piston rod 13, a sucker assembly 74 and a sucker 741.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by referring to the orientation description, such as up, down, front, back, left, right, first direction, second direction, third direction, etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the present number, and the terms greater than, less than, within, etc. are understood as including the present number. If any description to first, second and third is only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, the utility model discloses a PCB board location jack, including transfer location platform 3, silk screen printing machine 4, manipulator 6 and grabbing device 7.

Wherein, silk screen printing machine 4 is used for carrying out the vacuum consent to PCB board 1 including being used for the location to place PCB board 1's silk screen printing mesa 41, silk screen printing machine 4.

Referring further to fig. 3 and 4, the transfer positioning table 3 includes a base 31, a guide bar 32, a slide support block 33, and a fixed support block 34.

The guide rod 32 is obliquely arranged on the base 31, the sliding support block 33 is slidably connected with the guide rod 32, the sliding support block 33 is provided with a first support inclined surface 331 parallel to the guide rod 32, the fixed support block 34 is arranged on the base 31 and close to the lower end of the guide rod 32, the fixed support block is provided with a second support inclined surface 341 and a positioning inclined surface 342, the second support inclined surface 341 and the first support inclined surface 331 are in the same plane, and the second support inclined surface 341 and the positioning inclined surface 342 are perpendicularly intersected. The position of the sliding support block 33 on the guide rod 32 is adjusted according to the length of the PCB board 1, so that the distance between the sliding support block 33 and the positioning inclined plane 342 is slightly less than the length of the PCB board 1, and the sliding support block can adapt to PCB boards 1 of different sizes, and because the first support inclined plane 331 and the second support inclined plane 341 only contact with the edge of the PCB board 1, ink on the PCB board 1 with holes plugged can not be adhered.

In addition, the grabbing device 7 is installed on the manipulator 6, the grabbing device 7 can grab or release the PCB board 1, and the manipulator 6 can drive the grabbing device 7 to move back and forth between the transfer positioning table 3 and the screen printing table 41.

This radio-cassette player is in the course of the work, PCB board 1 is through placing on first support inclined plane 331 and second support inclined plane 341, rely on first support inclined plane 331 and second support inclined plane 341 in the coplanar to support jointly, PCB board 1 can rely on the dead weight to make its lower terminal surface support and fall on location inclined plane 342, location inclined plane 342 can be effectively to PCB board 1 accurate location on length direction, then can remove PCB board 1 again through grabbing device 7 and shift to silk screen printing mesa 41 to, guarantee that PCB board 1 places the position of 41 on the silk screen printing mesa at every turn unified, the printing precision is very high, treat after the completion of vacuum consent, manipulator 6 drives grabbing device 7 again and shifts PCB board 1 to transfer positioning table 3 and fix a position again, prepare for accurate unloading, the whole process realizes full automatization, it is very high-efficient.

Referring to fig. 1 and 9, in some embodiments of the present invention, the radio cassette player may further include an upper rack 2 and a lower rack 5, the upper rack 2 is used for stacking a plurality of PCB boards 1 waiting for vacuum plugging, the lower rack 5 is provided with a plurality of vertical insertion slots 51, the plurality of insertion slots 51 are horizontally spaced, the insertion slots 51 can be inserted into the plugged PCB boards 1, used for airing the PCB (printed circuit board) 1 to dry the printing ink on the PCB 1, in addition, the manipulator 6 can also drive the gripping device 7 to reciprocate between the transfer positioning table 3 and the loading frame 2 and between the transfer positioning table 3 and the inserting groove 51, then, in the working process, the manipulator 6 drives the gripping device 7 to grip the PCB boards 1 stacked on the feeding frame 2 one by one, because the PCB board 1 is stacked, the position and the angle of the PCB board 1 grabbed at each time are not uniform, but the uniform and accurate positioning of the PCB board 1 can be realized through the transfer positioning table 3.

With further reference to fig. 5, in some embodiments of the present invention, the gripping device 7 comprises a mounting frame 71, a bracket assembly 73 and a suction cup assembly 74, wherein the bracket assembly 73 and the suction cup assembly 74 can transfer the PCB board 1 in a division and cooperation manner.

Referring to fig. 6 and 7, wherein the first direction, the second direction and the third direction are perpendicular to each other, the gripping device 7 may further include a side clamp assembly 72, the side clamp assembly 72 is mounted at one end of the mounting bracket 71 with respect to the first direction, the side clamp assembly 72 includes at least one pair of clamping jaws 721 spaced and disposed opposite to each other along the third direction, the pair of clamping jaws 721 are configured to clamp the PCB 1 along the third direction, and the side clamp assembly 72 may clamp the PCB 1 on the transfer table 3, transfer the PCB to the discharging rack 5 by the manipulator 6, and insert the PCB into the insertion slot 51.

Referring to fig. 1 and 8, the suction cup assembly 74 is mounted at the other end of the mounting frame 71 relative to the third direction, the suction cup assembly 74 includes a plurality of suction cups 741, the suction cups 741 are located in the same plane perpendicular to the third direction, the suction cup assembly 74 can suck the stacked PCB boards 1 on the feeding frame 2 one by one, the PCB boards are placed on the first supporting inclined plane 331 and the second supporting inclined plane 341 by the transfer of the manipulator 6, the PCB boards 1 are completely positioned, the suction cup assembly 74 sucks the PCB boards 1 again, and then the PCB boards 1 are transferred to the screen printing table 41 by the manipulator 6.

After the hole of the PCB 1 is plugged, the sucking disc assembly 74 is not convenient to reuse to suck the PCB 1 due to the fact that the areas of the PCB 1 except the edge are stained with ink, the sucking disc assembly 74 sucks the ink easily, and therefore the PCB 1 can be clamped by the supporting clamp assembly 73.

Referring to fig. 1 and 8, the bracket component 73 is mounted at one end of the mounting frame 71 relative to the third direction, the bracket component 73 includes at least one pair of clamping units 731 arranged at intervals along the second direction, the clamping units 731 can move along the second direction relative to the mounting frame 71, the clamping units 731 are used for clamping the PCB board 1 along the third direction, after the PCB board 1 completes the hole plugging, the bracket component 73 can clamp the PCB board 1 on the screen printing table 41, and the PCB board is transferred and placed on the first supporting inclined plane 331 and the second supporting inclined plane 341 by the manipulator 6.

Referring to fig. 2, since the PCB 1 is attached to the screen printing table 41, considering that the bracket assembly 73 has a certain difficulty in clamping the PCB 1 on the screen printing table 41, and is easy to scratch the screen printing table 41 and the PCB 1, the screen printing table 41 is provided with a first avoiding groove 42 at a position corresponding to an edge of the PCB 1, the clamping unit 731 includes a fixing clamp plate 7311 and a cylinder 7312, the fixing clamp plate 7311 can extend into the first avoiding groove 42, a piston rod 7313 of the cylinder 7312 can extend and retract along a third direction to clamp the PCB 1 by matching with the fixing clamp plate 7311, the fixing clamp plate 7311 is far away from the mounting frame 71 in the third direction compared with the piston rod 7313 of the cylinder 7312, when the bracket assembly 73 works, the PCB 1 is horizontally placed on the screen printing table 41, the gripping device 7 shown in fig. 1 and 8 is turned over by 180 degrees, so that the third direction is a vertical direction, each pair of the clamping units 731 first moves outwards along the second direction (the left and right direction shown in fig. 1) relative to the mounting frame 71, then, the clamping unit 73 moves upwards for a short distance, so that the fixing clamping plate 7311 slightly supports the PCB 1, and then the cylinder 7312 drives the piston rod 7313 to extend out to press the edge of the PCB 1 against the fixing clamping plate 7311, so that the PCB 1 can be taken away without rubbing the screen printing table 41 and the PCB 1.

In addition, in order to facilitate the transfer of the PCB 1 transferred by the bracket clip assembly 73 on the transfer positioning table 3, the fixed supporting block 34 is provided with a V-shaped groove 343, the V-shaped groove 343 is surrounded by the second supporting inclined surface 341 and the positioning inclined surface 342, the second avoiding groove 344 is formed below the V-shaped groove 343 by the fixed supporting block 34, the second avoiding groove 344 is communicated with the V-shaped groove 343, the third avoiding groove 332 is formed at a position corresponding to the second avoiding groove 344 by the sliding supporting block 33, and the second avoiding groove 344 and the third avoiding groove 332 can avoid the fixed clamping plate 7311, so that the bracket clip assembly 73 can place the PCB 1 on the transfer positioning table 3 without obstacles.

In addition, referring to fig. 5 and 6, in some embodiments of the present invention, the mounting frame 71 includes a main bracket 711 and two side brackets 712 respectively mounted at two ends of the main bracket 711 relative to the second direction, and each of the side brackets 712 is adjustable in position relative to the main bracket 711 in the second direction, specifically, manually adjustable, or automatically adjustable, for example, by a lead screw and nut mechanism to precisely adjust the position of the side bracket 712.

The supporting and clamping assembly 73 includes four clamping units 731 distributed in a matrix, as shown in fig. 8, two of the clamping units 731 are disposed on one of the side brackets 712 at intervals along the first direction, the other two clamping units 731 are disposed on the other side bracket 712 at intervals along the first direction, the clamping units 731 can move along the second direction relative to the side brackets 712, the four clamping units 731 can stably support and clamp the PCB board 1, and the supporting and clamping assembly 73 can support and clamp PCB boards 1 with different sizes because the positions of the side brackets 712 relative to the main bracket 711 in the second direction are adjustable.

Referring to fig. 6 and 8, in some embodiments of the present invention, some suction cups 741 are installed on the main support 711, and other suction cups 741 are installed on two side supports 712, and the suction cups 741 on the side supports 712 are aligned in a first direction, and since the position of the side supports 712 relative to the main support 711 in the second direction is adjustable, the position of the suction cups 741 on the side supports 712 can be adjusted, so as to form a central and two-side synchronous suction manner, so that the suction cup assembly 74 can suck PCB boards 1 with different sizes, and the suction manner by the suction cup assembly 74 is particularly effective for the stacked PCB boards 1 on the feeding frame 2.

In order to prevent the excessive impact force when the suction cups 741 are in contact with the PCB 1, referring to fig. 6, the main bracket 711 is elastically connected to the main bottom plate 713, part of the suction cups 741 are distributed on the main bottom plate 713, each side bracket 712 is elastically connected to the side bottom plate 714, and the rest of the suction cups 741 are distributed on the two side bottom plates 714, so that the suction cups 741 can be buffered when in contact with the PCB 1.

In some embodiments of the present invention, the side clamping assembly 72 includes two pairs of clamping jaws 721, wherein one pair of clamping jaws 721 and the other pair of clamping jaws 721 are disposed on the main bracket 711 along the second direction interval, and the two pairs of clamping jaws 721 can also stably clamp the PCB board 1, especially, the PCB board 1 can be conveniently inserted into the insertion groove 51 on the blanking frame 5.

In some embodiments of the present invention, referring to fig. 3, the base 31 is provided with a screw rod 35 and a driving unit in transmission connection with the screw rod 35, the screw rod 35 is parallel to the guide rod 32, the screw rod nut 36 is installed on the fixed supporting block 34, the screw rod nut 36 is connected with the screw rod 35 in a matching manner, wherein the driving unit may be a stepping motor, the driving unit drives the screw rod 35 to rotate, so that the screw rod nut 36 can move on the screw rod 35, thereby allowing the sliding supporting block 33 to slide on the guide rod 32, the sliding precision of the sliding supporting block 33 is very high, so as to accurately match the size of the PCB board 1.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. PCB board location radio cassette player, its characterized in that includes:

   the transfer positioning table comprises a base, a guide rod, a sliding support block and a fixed support block, wherein the guide rod is obliquely arranged on the base, the sliding support block is connected with the guide rod in a sliding manner, the sliding support block is provided with a first support inclined plane parallel to the guide rod, the fixed support block is arranged on the base and close to the lower end of the guide rod, and is provided with a second support inclined plane and a positioning inclined plane;

   the screen printing machine comprises a screen printing table top for positioning and placing the PCB;

   the grabbing device is arranged on the manipulator and can grab or release the PCB, and the manipulator can drive the grabbing device to move back and forth between the transfer positioning table and the screen printing table surface.
2. 2. The PCB positioning and picking machine of claim 1, wherein the grabbing device comprises a mounting frame, a bracket assembly and a suction cup assembly, the bracket assembly is mounted at one end of the mounting frame relative to a third direction, the bracket assembly comprises at least one pair of clamping units spaced along a second direction, the clamping units are movable relative to the mounting frame along the second direction, the clamping units are used for clamping the PCB along the third direction, the suction cup assembly is mounted at the other end of the mounting frame relative to the third direction, the suction cup assembly comprises a plurality of suction cups, the suction cups are located in a same plane perpendicular to the third direction, and the second direction and the third direction are perpendicular to each other.
3. 3. The PCB board positioning radio cassette player of claim 2, wherein the silk screen printing table top is provided with a first avoiding groove at the edge corresponding to the PCB board, the clamping unit comprises a fixed clamp plate and a cylinder, the fixed clamp plate can extend into the first avoiding groove, a piston rod of the cylinder can extend and retract along the third direction to cooperate with the fixed clamp plate to clamp the PCB board, and the fixed clamp plate is compared with the piston rod of the cylinder and is kept away from the mounting rack in the third direction.
4. 4. The PCB board positioning and retracting machine of claim 3, wherein the fixed support block is provided with a V-shaped groove, the V-shaped groove is defined by the second support inclined surface and the positioning inclined surface, the fixed support block is provided with a second avoiding groove below the V-shaped groove, and the second avoiding groove is communicated with the V-shaped groove.
5. 5. The PCB board positioning and picking machine as recited in claim 4, wherein the sliding support block is provided with a third avoiding groove at a position corresponding to the second avoiding groove.
6. 6. The PCB positioning and retracting machine of claim 2 or 3, wherein the mounting frame comprises a main support and two side supports respectively mounted at two ends of the main support with respect to the second direction, each of the side supports being adjustable in position with respect to the main support in the second direction.
7. 7. The PCB positioning and picking machine of claim 6, wherein the clamping assembly comprises four clamping units distributed in a matrix, two of the clamping units are arranged on one of the side brackets at intervals along a first direction, the other two clamping units are arranged on the other side bracket at intervals along the first direction, the clamping units can move along the second direction relative to the side brackets, and the first direction is perpendicular to the second direction and the third direction.
8. 8. The PCB positioning and retrieving machine of claim 6, wherein a portion of said suction cups are mounted on said main support and the remaining suction cups are mounted on two of said side supports.
9. 9. The PCB positioning and retracting machine of claim 8, wherein the main support is elastically connected with a main bottom plate, some of the suckers are distributed on the main bottom plate, each of the side supports is elastically connected with a side bottom plate, and the rest of the suckers are distributed on two of the side bottom plates.
10. 10. The PCB positioning and retracting machine of claim 1, wherein a lead screw and a driving unit in transmission connection with the lead screw are arranged on the base, the lead screw is parallel to the guide rod, a lead screw nut is mounted on the fixed supporting block, and the lead screw nut is in fit connection with the lead screw.

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