(This is a topic I posted for a user. This post summarizes the conversation to-date – Alden
Hello,
I have a question regarding to the gShield v5. I want to use it with a shapeoko 2 and NEMA 23 Motors.
I wonder if the shield works with the following stepper motor specs:
Size: 56.4 mm square × 56 mm, not including the shaft (NEMA 23)
Weight: 0.7 kg (25 oz)
Shaft diameter: 1/4″ (6.35 mm) “D”
Steps per revolution: 200
Current rating: 2.8 A per coil
Voltage rating: 2.5 V
Resistance: 0.9 Ohm per coil
Holding torque: 13 kg-cm (180 oz-in)
Inductance: 2.5 mH per coil
Lead length: 12 in
As Power supply I plan to use a 24V 10A
Thanks for your help!
Regards (name here)
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First response:
Running one of these per axis is probably fine. If the drivers heat up too much we recommend fan cooling. Running 2 motors in parallel off the Y channel may be too much. Many people who have gone to NEMA23 on S2 have upgraded to TinyG to get the individual motor controls.
— Alden
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Response:
So I think it’s better to use a 2,5A Version with 4,5V instead of the mentioned 2,5V 2,8A version?
Thanks (name here)
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Response:
The voltage makes no difference as it’s just a measure of what the maximum voltage can be if you send DC current through the motor. Which we do not do. We explain this here:
https://github.com/synthetos/TinyG/wiki/Stepper-Motors-and-Power-Supplies
So once you have the right steps per revolution (200 is fine) then it’s just a matter of the torque that you get out for current in. For example this motor:
http://www.automationtechnologiesinc.com/products-page/nema-23/nema-23-bipolar-stepper-motor-425-oz-in-14%E2%80%9D-shaft-with-a-flat
Is the best I’ve seen anywhere – delivering 425 oz/in for 2.8 amps, or a factor of 151 oz-in per amp – way better than I’ve seen anywhere.
— Alden
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