I’m swapping from the Nema 17 steppers to Nema 23 with Gt2.5 belts and pulleys. The issue i have is the new Nema 23 have come with a difference wiring colour code.
Red, Yellow, Blue & Green.
Now i’ve done a search online and found a few difference colour codes to cross over to the X-carve colours Red, white/blue, Black & green. I wired it as per one instruction and the x axis moved backwards… and the Y wouldn’t budge. So with a bit of swapping around i got the X to move correctly but using the same wiring code the Y axis wasn’t happy at all.
Does anyone have a good cross reference colour code?
I did, but after it didn’t work that was my first thought so i unplugged one side and tried again and the motor still makes a grumbling noise and doesn’t move. so i think I’ve got some wires the wrong way round.
From what i understand you have two pairs
A+ A- & B+ B-
What I don’t know is which colour is which on the new colour code. For now at least my aim is to get one side of the Y axis working correct and then connect up the other side once i know that the wiring is right.
You can also connect one pair (out the 4 wires) together and spin the shaft by hand, you will feel it cogging if you have found a matching pair. The stepper motor have two coils and if you short the input/output lead of a coil you will insert a magnetic force holding the motor back. A Nema23 with both coils shorted will be very hard to flip by hand.
(all this assumes motor not connected to anything)
Thanks for the help, i followed the LED test and found the pairs. From there i looked back at the original wiring and got the X and 1 side of the Y working. Once i was happy with them i connected the second Y motor and reversed two of the wires.
I’m now making a new box for the power supply and the G-shield. Once that is done it just a case of resetting the number of steps per mm for the Nema23 and the GT2.5 belts. Does anyone have a base line number i could use?
Most likely the Nema23’s have the same step ratio as the 17’s, 200step / revolution, 1.8deg/step.
If so no need to readjust any step values. You might need to readjust the stepper current limits in order to utilize the added torque the 23’s provide.
I’ve been doing a hell of a lot of carving over the last week. The machine has been running for at least 7 hours for three days on the trot which is the most i’ve ever ran the Xcarve in a short time.
The belts on the X and one side of the Y axis have gone like this:
I had a belt look like that, it was caused when a pulley slipped and the belt was dragged under the edge of the smooth idler. The belt was crushed and the teeth were all a mess. I replaced and re-tightened everything…your belt looks similar.
