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250mm 40120 Extrusion
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Rat Rig StrongHold ONE CNC Bottom Plate
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Rat Rig StrongHold ONE CNC TopPlate
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3x M12x45 Cap Head Screw
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3x M12x25 Countersunk Screw
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3x M12 Washers
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250mm 40120 extrusion
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Rat Rig StrongHold ONE CNC Bottom Plate
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3x M12x25 Countersunk Screw
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Tighten the screws on the Bottom Z Plate
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Assembly from previous Step
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Rat Rig StrongHold ONE CNC Top Plate
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3x M12 Washers
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3x M12x45 Cap Head Screw
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Tighten the screws on the Top Z Plate
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2x 250mm MGN15 Linear Rail with 2x Carriages
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10x M3x16 Cap Head Screw
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10x 4040 Drop-in T-Nut - M4
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Leave the holes on the ends empty
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Prepare the Linear Rails as detailed in Step 6 of the X-Axis Gantry Assembly Guide
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Insert an M3x16 Cap Head Screw into each of the holes on the linear rail and loosely thread a 4040 Drop-in T-Nut
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Repeat these instructions for the second linear rail
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The linear rail carriages are not interchangeable. Do not try to use a carriage on a different linear rail than the one it was supplied with.
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Assembly from Step 3
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Linear Rail assembly from the previous step
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Install the MGN15 40120 alignment tool as shown, this will make sure the linear rail is positioned correctly
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Tighten the screw next to the alignment tool
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Repeat the steps to tighten the screw on the other end of the rail
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Tighten the remaining screws
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MGN15 linear rail
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Place the linear rail on to the 40120 extrusion as shown, do not tighten any of the screws at this point
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Rat Rig StrongHold ONE CNC XZ Joiner Plate
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4x M5x16 Low Profile Cap Head Screw
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2x Nut Block for TR8x8
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4x M5 Nylon Locking Hex Nut
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Repeat Steps 9 and 10 to assemble another XZ plate
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Assembly from previous step
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XZ Plate assembly from previous step
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Make sure the Nut Blocks face are facing the assembly, and the threads are oriented accordingly to the linear rails
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16x M3x8 Cap Head Screw
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Install an M3x8 screw through each hole in the plate, and into the MGN15 linear rail carriage below, lighty tighten them
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Push the XZ Plate to the one side
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Tighten the M3x16 screw closest to the XZ plate
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Repeat the Steps with the Plate pushed to the opposite side
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If the Z-axis binds or becomes tight, check that the lower rail is aligned correctly. Loosening the screws securing the lower rail to the 40120 extrusion and repeat the steps above.
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Do not overtighten the screws as it can cause the axis to bind.
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Remove the XZ Plate
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Tighten the remaining screws on the linear rail
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Move the carriages to access the screws underneath them
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Reinstall the XZ plate and tighten the screws on it
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688ZZ Ball bearing
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Push the ball bearing against the slot on the inner side of the plate.
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688ZZ Ball bearing
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Push the ball bearing against the slot on the inner side of the plate.
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281mm TR8x8 Lead Screw
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2x Precision Shim 12x8x1mm
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Thrust Bearing F8-16M
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2x Lock Collar 8mm
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2x 688ZZ Ball Bearing
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Insert the Lead Screw through the hole in the ball bearing
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Precision Shim
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Lock Collar
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Slide the components into the Lead Screw
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Do not tighten the screw on the Lock Collar yet.
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Thread the lead Screw in to the Nut Blocks on the XZ Plate and push the assembly
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Lock Collar
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Precision Shim
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Push the exposed end of the Lead Screw through the hole in the ball bearing
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Tighten the Screws on the Lock Collars to avoid the lead screw from falling in the next steps
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Install the Thrust Bearing F8-16M on to the Lead Screw
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Be careful that the bearing does not fall off whilst this assembly is set aside
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