3. X-Carriage Assembly

Assemble the top right Solid-Wheel set first. Insert a M5-Button-Head-Bolt-30mm through the Z-Plate from the back.

On to the bolt add an Eccentric-Spacer-6mm. (Rounded portion into the Z-Plate)

Then add a Precision-Shim - ->- - Solid-Wheel - ->- - Precision-Shim

Finally add a M5-Nyloc-Nut. This can be tightened. Ensure that the Solid-Wheel still rotates freely.

Repeat the above for the other 2 x Solid-Wheel set on the right row.

Repeat for the 3 x Solid-Wheel sets on the left row, but use a Aluminium-Spacer-6mm instead of each Eccentric-Spacer-6mm.

On the hexagonal portion of the Eccentric-Spacer-6mm, there will be a face that is marked with ‘6mm’.

Using a 8mm spanner, rotate each Eccentric-Spacer-6mm so that this face is facing right. (Doing this maximises the gap between the left and right row of Solid-Wheels)

Insert Extrusion-D in-between the two rows of wheels. Turn the assembly on to it's left side so Extrusion-D is sitting on the left row of Solid-Wheels.

Starting with the top right Solid-Wheel. Rotate the Eccentric-Spacer-6mm until there is a small amount of friction between the Solid-Wheel and Extrusion-D

Repeat for the bottom right Solid-Wheel. Then repeat for the middle right Solid-Wheel.

Slide Extrusion-D back and forth. This should require a small amount of force, and all Solid-Wheels should spin.

Check there is no wobbling of Extrusion-D. Once happy, double-check the tightness of the M5-Nyloc Nuts.

Attach the Z-Axis-Nut-Block to the Z-Plate using 2 x M5-Button-Head-Bolt-25mm & 2 x M5-Nyloc-Nuts.

In the Z-Axis-Nut-Block bag there is a set screw. Screw it into the top of the Z-Axis-Nut-Block until it just touches the surface on the opposite side of the gap.

Attach 2 x Nut-Blocks to the X-Plate-Back using 2 x M5-Button-Head-Bolt-25mm & 2 x M5-Nyloc-Nuts.

Attach the Limit-Switch-2 to the threaded holes on the back of the X-Plate-Front using 2 x M2.5-Button-Head-Bolt-10mm.

Assemble the bottom right Solid-Wheel set first. Insert a M5-Button-Head-Bolt-60mm through the X-Plate-Front from the front.

On to the bolt add an Eccentric-Spacer-6mm. (Rounded portion into the X-Plate-Front)

Then add a Precision-Shim - ->- - Solid-Wheel - ->- - Aluminium-Spacer-9mm - ->- - Solid-Wheel - ->- - Precision-Shim

Add an Eccentric-Spacer-6mm then the X-Plate-Back. (Rounded portion of the Eccentric-Spacer-6mm goes into the X-Plate-Back)

On the outside of the X-Plate-Back add onto the bolt a Precision Shim then a M5-Nyloc-Nut. Only slightly thread on the M5-Nyloc-Nut.

Repeat the above for the other Solid-Wheel set on the bottom row.

Repeat for the 2 x Solid-Wheel sets on the top row, but use a Aluminium-Spacer-6mm instead of each Eccentric-Spacer-6mm.

The M5-Nyloc-Nuts can now be tightened. Ensure that each Solid-Wheel still rotates freely.

On the hexagonal portion of the Eccentric-Spacer-6mm, there will be a face that is marked with ‘6mm’.

Using a 8mm spanner, rotate each Eccentric-Spacer-6mm so that this face is facing downwards. (Doing this maximises the gap between the top and bottom row of Solid-Wheels)

Insert Extrusion-D in-between the two rows of wheels. Turn the assembly upside down so Extrusion-D is sitting on the top row of Solid-Wheels.

Rotate both Eccentric-Spacer-6mms on one set of Solid-Wheels until there is a small amount of friction between the Solid-Wheels and Extrusion-D

Repeat for the other set of Solid-Wheels.

Slide Extrusion-D back and forth. This should require a small amount of force, and all Solid-Wheels should spin.

Check there is no wobbling of Extrusion-D. Once happy, double-check the tightness of the M5-Nyloc Nuts.

Mate the Z-Plate-Assembly to the X-Plate-Front.

The Z-Plate-Assembly should be orientated with the Eccentric-Spacer-6mms on the right side.

Secure using 4 x M5-Cap-Head-Bolt-12mm, 4 x Precision Shim and 4 x Locking-Washer.

The Locking-Washer should go in-between the Precision-Shim and Z-Plate.

Slide Extrusion-D through the Solid-Wheels on the Z-Plate-Assembly.

Attach a Z-End-Plate to the top of Extrusion-D using 4 x M5-Button-Head-Bolt-16mm.

Tighten the bolts fully.

Attach a Z-End-Plate to the bottom of Extrusion-D using 4 x M5-Button-Head-Bolt-16mm.

Tighten the bolts fully, and then loosen by a single full turn.

Slide the 1/4” side (the side with the smallest hole) of the Flexible-Coupler onto the shaft of the Stepper-Motor. Don’t tighten it down at this point.

Attach the Stepper-Motor to the threaded holes on the top Z-End-Plate using 4 x M5-Cap-Head-Bolt-50mm and 4 x Aluminium-Spacer-40mms.

In this case it should look like Image 3.

Slide the Lead-Screw-Z through the bottom Z-End-Plate. Then slide on a Flanged-Radial-Bearing (facing downwards) - ->- - Bearing-Shim - ->- - Lock-Collar.

Thread the Lead-Screw-Z through the Z-Axis-Nut-Block. Then slide on a Lock-Collar - ->- - Bearing-Shim - ->- - Flanged-Radial-Bearing (facing upwards).

Continue threading through the Lead-Screw-Z until it is touching the Stepper-Motor shaft.

Position the Flexible-Coupler so it is half on the Lead-Screw-Z and half on the Stepper-Motor shaft.

Top & Bottom, slide the Flanged-Radial-Bearings along the Lead-Screw-Z until they seat fully in the Z-End-Plates.

Slide the Bearing-Shim against the Flanged-Radial-Bearing, and finally slide the Lock-Collar so it is firmly against the Bearing-Shim. Lock each Lock-Collar in place using the grub screw on the side.

Locate the four bottom M5-Button-Head-Bolt-16mm that were loose from Step 9. These can now be fully tightened. This will remove any play that may be present.

Firmly hold the Assembly, and check for any up and down play in Extrusion-D.

If there is any, this is due to backlash in the Z-Axis-Nut-Block.

The set screw which was inserted in Step 3 into the Z-Axis-Nut-Block can be tightened to remove backlash.

Feed the wire of Limit-Switch-2 attached in Step 5 through the hole opposite on the X-Plate-Back.

A Drag-Chain-Mount needs to be attached to the X-Plate-Back.

Insert 2 x M5-Button-Head-Bolt-16mms through the Drag-Chain-Mount.

Notice on the back of the Drag-Chain-Mount there is a slot. The Limit-Switch-2 wire goes up the X-Plate-Back and through this slot.

Put the Drag-Chain-Mount against the X-Plate-Back with the Limit-Switch-2 wire in this slot.

Then add a Precision-Shim and M5-Nyloc-Nut on the opposite side of the X-Plate-Back.

Tighten the Drag-Chain-Mount against the X-Plate-Back

Image 1 shows it taught in-between the Solid-Wheels.

Image 2 shows it taught up the back of the X-Plate-Back.

Image 3 shows it inside the slot on the Drag-Chain-Mount.

Use a small cable tie to secure it to the Drag-Chain-Mount.

Guide Complete - Proceed to 4. X-Gantry Assembly