Will these stepper motors work?

X-Carve
1

Hi all,

I’m planning on building an X-carve and I hope to reuse some stuff I have in the studio. I plan on decommissioning one of our old Bits from Bytes Rapman 3d printers and reuse the steppers used in that machine as they are quit powerful. But I’m always a bit intimidated by stepper specifications so I hope you can help me here. The NEMA 17 looks to be exactly the same as the one on Inventables and I would like to use this one for the Z but the 23 I am not sure about… Will these work with the gShield and standard power supply? Thank you!

Here are the specs:

3 x NEMA 23 M57STH51-3008DC
-1.8 deg/step
-Voltage: 2.2V
-Current/Phase: 3A
-Resistance/Phase: 0.74 Ohm
-Inductance/Phase: 0.9 mH
-Holding Torque: 706 mNm
-Rotor Inertia: 275 gcm2
-Detent Torque: 360 gcm
-Length: 51mm

1 x NEMA 17 M42STH47-1684SG
-1.8 deg/step
-Voltage: 2.8V
-Current/phase: 1.68A
-Inductance/Phase: 2.8 mH
-Resistance/Phase: 1.65 Ohm
-Holding Torque: 431mNm
-Rotor Inertia: 68 gcm2
-Detent Torque: 200 gcm
-Length: 48mm

2

Those appear to be “Double Stack” steppers which means they are longer. They would still work, but stick out farther than the stock motors. I would suggest a single stack Nema 23 for the Z axis, but a double stack works here as well if you mount it upside down. No biggie.

3

The NEMA 23 mentioned in the BOM are 51mm as well, aren’t these double stack as well?
But since I only have 3 NEMA 23’s I was planning on using the one NEMA 17 for the Z axis.
I think dimensions should be fine, I was more worried about electronic specs.

4

I was basing my comment on the picture of the stepper when I searched that model number. So perhaps they used a generic picture.

The generic specs should be fine as well. I believe the GRBL shield can only provide 2.5 amps per stepper and that may require some cooling.