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The Polargraph Shop

Polargraph Stepper Motors

£22.00 Sold out

Image of Polargraph Stepper Motors

These are the neat little motors I use. They are 0.4 amp NEMA-17 bipolar stepper motors with 1.8 degree steps (200 steps per revolution). They have four 30cm wires and bare ends. The shaft is 5mm diameter and 20mm long with a machined flat.

The motor body itself is 35mm long (front to back).

I usually use A4988 motor drivers (stepstick / pololu) to drive these with a 9 or 12 volt supply. I supply a 9v supply with the PolargraphSD kits, because that seems to be enough, and 12v makes them pretty warm.

Features:
  • Bi-polar
  • NEMA-17 frame size
  • 5mm dia, 20mm long shaft with machined flat
  • 0.4 amp
  • 230g
  • 26Ncm

This sale is for a pair of motors, with 8mm m3 stainless steel bolts and washers.

On the PolargraphSD kits, I used these little breakout PCBs for a neat connecting job. These have an array of 2.5mm pitch holes to mount terminals for the wires (or to solder the wires into directly), and on the other end holes for mounting either 2.5mm pin hardware (eg 0.1" pin headers), or 3.5mm pin hardware (eg pcb mount screw terminals).

If you choose them, breakouts will be supplied unassembled, and including ONLY the "in" fixed terminal blocks. So not including the the "out" hardware: the pin headers or the screw terminals that you'd use to connect your long wires.

The 3d printable parts to mount the breakout PCB onto the MDF bracket is available on github.

Postage is £4 in the UK, £8 in Europe, and £12 everywhere else.