Description
The Belt Actuator Kit provides smooth operation for a Gantry along 20×40 V-Slot Linear Rail. It is both accurate and quick, ideal for Camera Sliders.
This kit is an easy way to get all the pieces needed for the build.
The kit includes :
| Item | Sku | Quantity |
| Nema 17 Stepper Motor 560mN.m – Version B | ELEC-NEMA17-B | 1 |
| GT2 (2mm) Aluminum Timing Pulley 20 Tooth | BELT-GT2-TP20 | 1 |
| Metric Aluminum Spacers – 30mm | SHIM-SPAC-30MM | 4 |
| Metric Aluminum Spacers – 3mm | SHIM-SPAC-3MM | 1 |
| M3 Button Head Screws – 35mm | SCREWS-M3-BH-35-1 | 4 |
| Smooth Idler Pulley Kit | WHEEL-PULLEY-KIT | 1 |
| M5 Low Profile Screws – 8mm | SCREWS-M5-LP-8-1 | 8 |
| Tee Nuts – 1 Piece | HARD-TNUT-M5-1 | 8 |
| Actuator Pulley Plate | PLATE-ACTUATOR-PULLEY | 2 |
| Cable Tie – 100mm | HARD-TIE-100MM-1 | 4 |
| 20mm V-Slot Gantry Plate | PLATE-20MMGANTRY-VSLOT | 1 |
| Solid V Wheel Kit | WHEEL-SOLIDV-KIT | 4 |
| Metric Aluminum Spacers – 6mm | SHIM-SPAC-6MM | 2 |
| Eccentric Spacers – 8mm Hex – 6mm Height | SHIM-ECCENTRIC-8-6 | 2 |
| M5 Low Profile Screws – 25mm | SCREWS-M5-LP-25-1 | 4 |
| V-Slot 20 x 40mm – 500mm | LR-2040-S-500 | 1 |
| GT2 (2mm) Timing Belt (per meter) | BELT-GT2-1M | 2 |
Tools required:
Pulley resolution:
The table below shows the resolution for this actuator using a bipolar stepper motor. We recommend 1/16th microstepping. This kit comes with a 20 tooth GT2 pulley.
| Microstepping | 20T | 30T | 36T | 40T | 60T |
|---|---|---|---|---|---|
| FULL | 0.20mm | 0.30mm | 0.36mm | 0.40mm | 0.60mm |
| 1/2 | 0.10mm | 0.15mm | 0.18mm | 0.20mm | 0.30mm |
| 1/4 | 0.05mm | 0.075mm | 0.09mm | 0.10mm | 0.15mm |
| 1/8 | 0.025mm | 0.0375mm | 0.045mm | 0.05mm | 0.075mm |
| 1/16 | 0.0125mm | 0.01875mm | 0.0225mm | 0.025mm | 0.0375mm |
| 1/32 | 0.00625mm | 0.009375mm | 0.01125mm | 0.0125mm | 0.01875mm |
Pro Tip:
- Don’t forget to slide the Gantry onto the V-Slot before you attach both Actuator Pulley Plates.
- Don’t forget to attach the Timing Pulley to the Nema17B Motor shaft before attaching the Motor to the Plate.
- Follow this process for correct tensioning the GT2 Belt:
- Tighten the screws on one Actuator Pulley Plate to secure the Plate in position.
- Feed the Belt over the Pulleys and through the hollow center of the V-Slot
- Tie or Clamp the GT2 Belt on both sides of the Gantry
- Pull the other Actuator Pulley Plate away to Tension the GT2 Belt, tighten the screws on the Plate while it is under tension





















