Y & Z Motor Mount
We recommend using Nema 23 stepper motors. If you plan on using a Nema 17, you will require M3x60mm mounting hardware.
Parts for the Z-Axis Stepper Motor mount:
- 3 x Aluminium Spacers (40mm) – plastic standoffs pictured
- 3 x Low Profile Screws M5x55mm
- 3 x Small Washers
- 3 x Spring Washers
- 3 x M5 Nyloc Nuts
Add three M5x55mm low profile screws to the stepper motor and ensure the orientation is as pictured if you plan on using the same cable management system that we will be using.
Add the 40mm aluminium spacers (or plastic motor standoffs as pictured) to the screws.
Mount the Nema 23 stepper motor onto the X-Axis.
Add a washer, spring washer and M5 nyloc nut to each of the three screws and tighten down evenly. Adjust the flexible coupling to grab an even amount of both screw and stepper shaft and then tighten both grub screws carefully.
Parts for the Y-Axis Stepper Motor mount:
- 4 x Aluminium Spacers (3mm) – or plastic motor standoff as attached
- 4 x Low Profile Screws M5x25mm
- 4 x Standard Washers
- 4 x Spring Washers
- 4 x M5 Nyloc Nuts
Please note this build log does not show the smooth idler pulleys. We now include these in our standard kits to increase tooth engagement of the Y-Axis pulley. We have noted the differences in steps following, to the right is a photo demonstrating the finished installation of smooth idler pulleys.
Drop a standard washer onto each of the four M5x25mm low profile screws.
Place screws so the washer sits on the front of the rear carriage plate and hold in place with the spacer. This direction for mounting the bolts was chosen as it gives the most clearance for the belt.
Place the Nema 23 stepper motor onto the screws and spacer stack. Add a small washer, spring washer and M5 nyloc nut to each. Lightly tighten in the lowest position.
Add the GT3 pulley, ready to install the belt but just lightly tighten at this stage, as we will align it with the belt a little later on.
- GT3 Belt
- 4 x Tee Nuts
- 4 x Low Profile Screws M5x10mm
Start by feeding the belts into the top slot underneath the first two wheels, then up over the pulley and back under the next two wheels.
Trim each to length, ensuring enough excess to lock off. We recommend doing a dry fit first to work out what length you require to lock off. In our case, we found 45mm to be sufficient.
Tip: Note in our photos we have also used double-sided tape to secure a second length of timing belt to the V-Slot to decrease the chance of belt stretch. This method is not required but a very cheap and easy way to add extra stiffness to your build.
Take excess from the lower slot back through the top, over the plate. Our optional extra step is to now tuck the lower excess onto the upper before threading the long excess end through the belt plate and locking off. If using the Robert Hummel plate set, belt plates will be provided. Our standard kit is simply putting the belt under the tee nut and winding down with a M5x10mm low profile screw to pin the belt down.