Skip to main content

​
Purchased Parts

You need to purchase the following components to build your OSSM. This list covers the official build configuration.
This guide covers the complete official OSSM build. Many modifications are available to customize your specific build—check the community mods section for alternatives.

​
Motor

IHSV57-30-18 servo motor with cable

NEMA 23 Servo Motor – IHSV57-30-18

NEMA 23 Servo Motor – IHSV57-30-18 Most builders choose the 180W model for maximum power. The 140W and 100W variants are also available if you prefer lower power consumption.
Avoid the StepperOnline version of this motor due to compatibility issues with the OSSM firmware.

​
Electronics

OSSM PCB controller board and wireless remote

OSSM PCB and Remote control unit

OSSM PCB & Remote The official OSSM control board and wireless remote for operating your machine.

​
Mechanical Components

GT2 timing pulley, 20 tooth, 8mm bore

GT2 20-tooth pulley with 8mm bore

GT2 Pulley – 20 Tooth, 8mm Bore, 10mm Belt Width
GT2 timing belt coil

GT2 timing belt, 10mm width

GT2 Timing Belt – 10mm Width × 500mm Length (minimum)
Purchase belt in bulk. While 500mm is the minimum for a standard build, having extra belt allows for adjustments and future modifications.
MR115 miniature roller bearings, 5x11x4mm

MR115 roller bearings

Roller Bearings MR115 – 5×11×4mm (Quantity: 6)

​
Power Supply

24V 5A fully enclosed switching power supply

24V 5A enclosed power supply

24V 5A Fully Enclosed Power Supply
Ensure your power supply is certified for use in your country (UL, CE, or equivalent certification).

​
Hardware

Assorted metric cap head screws in organizer case

Metric cap screw assortment kit

Metric Cap Screw Kit (approximately $20 USD) The build uses M3, M4, and M5 screws in various lengths:
  • Most M5 cap head screws are 20mm or 25mm long
  • The middle pivot mount requires 4× M5×35mm screws