This linear stage was design for the Z axis of a plotter. It uses a stepper motor to modify the position. The screw lead is a common M5 Caphead screw. I have had really good results raising and lowering a pen. I believe it will be ok to be used with heavier loads such as engraver motor. Make sure to keep the lead screw lubricated at all times. As Always happy to share the solidworks files, just get in contact.

Bill of Materials: *Item description for items available on Ebay UK. Also available from our favourite place China.

• Stepper Motor: Stepper Motor Nema 11 Stepper Motor 4-wires 28mm 0.8A 6.5Nm 10oz-in Bipolar CDD

• Bush: White nylon spacers plastic standoffs round thick. 3mm Internal diameter

• Flexible Coupling: Flexible Shaft Coupling Coupler Stepper Motor CNC 3D Printer 5mm

-Guides: 3mm x 54mm Dowel pins

-Lead Screw: M5x 40mm Cap head, chop the head off

• Lead screw nut: M5

Assembly considerations:

1. Push fit the bushes in the carriage. Push fitting the bush effectively deforms the internal diameter. Therefore it is recommended to use a 3.2mm bit drill and rectify the internal diameter, This will help the bushes to slide freely.

2. The sliders are two polished 3mm dowel bars. They are mean to be push fitted in the base. Make sure to do it carefully as the axial direction is the weakest side of the print. Drilling the holes using a 3.1mm drill bit helped to slide them easier and still are quite tight in the base.

3. Lead Screw Nut: To be push fitted in the carriage and if possible use supper glue to bind it to the carriage.