X-carriage assembly

Items you need for this step:

	1	Z plate
	1	X plate back
	1	X plate front
	20	v wheel assembly from first step
	6	M5 low profile 30mm screw
	9	eccentric spacer 6mm
	9	6mm aluminium spacer
	16	mini precision shim
	15	M5 nylon insert lock nut
	1	ACME nut block
	6	M5 low profile 25mm screw
	1	NEMA23 stepper motor
	9	9mm aluminium spacer
	7	M5 low profile 65mm screw

Attach 6 V wheel assemblies to the Z plate with 30mm screws – and at one side of the plate, use 6mm spacers with a precision shim, whereas at the other side, use eccentric spacers with a precision shim:

Then, attach the Z axis nut block:

Use 25mm or 30mm screws to attach the nut block – and position a 1mm precision shim with a 3mm spacer between the nut block and the Z plate. Use M5 lock nuts to secure the screws and nut block.

 

Now the x carriage will be built in a similar way as the Y side plates have been built, with 65mm screws, but notice that the 9mm high spacers are now on the top:

 

At the side of 4 wheels: first put a 6mm spacer + 1mm precision shim + wheel + 9mm spacer + wheel + 1mm precision shim + 9mm spacer

 

At the side of  3wheels: eccentric spacer + 1mm precision shim + wheel + 9mm spacer + 1mm precision shim + 3mm spacer + eccentric spacer:

 

 

And put the other x plate back / x carriage plate on top and use M5 nylon lock nuts to close.

 

Now is also a good moment to attach the Z axis limit switch as it’s easier to reach now:

 

And attach the Z plate to the X front plate with 20mm or 25mm screws:

 

You can at this point also add the ballscrew and ballscrew bearing holder

First slide the nut block holder over the ballscrew bearing WITHOUT TAKING THE BALLSCREW BEARING OFF THE BALLSCREW (or little balls will fall out and you may not be able to re-assemble):

And squeeze the ballscrew bearing with M4 screws into place

And with 20mm low profile screws it can be attached to the plate (picture showing without wheels and previously constructed plate on top):

And add the Z axis extrusion:

And the Z axis motor and leadscrew:

With 40mm spacers and 50mm screws: