The most straightforward fix will be to get a like for like motor of the same size, dimensions, and configuration.
Can you remove the Y stepper motor and check for markings and take some good photos?
can do, will remove and take photos
i cut the cable so I know exactly where the wires are attached. Sam
Information is scarce on that motor.
But the important parts:
- NEMA23 mount
- 2-phase
- 1.8 degree step
- 2.8A current
- 4-wire terminal
- 51 mm long body - this dimension is not critical as long as the motor otherwise fits
- bipolar motor
One thing that’s not clear but may be important is shaft size. Try measuring the shaft and finding a stepper with the same shaft size. Otherwise you could also just get a replacement pinion gear that matches the tooth profile.
I could find no other information on torque values or voltage tolerances.
Focus on the NEMA 23, 2.8A, 2-phase, bipolar, 4-wire, and match the shaft size. If you look for motors intended for laser machines this should get you something that should adequately work.
Hi ordered the Nema 23 stepper motor let you know when i recieve it and install. Sam
Any news on the install? I’m in the same situation!..
Hi Simon, yes finally got the drive motor from China cost $ 60 took 1 month unfortunately shaft size is smaller slightly have to get a sleeve. i am currently in house modification, about 2 weeks away from putting it back together if that’s ok I will be in touch, want my machine running again also, talk with you soon Ciao Sam
Hi Simon sorry to take so long house modification held me back, have installed Nema 23 stepper motor, added sleeve to shaft and installed, very difficult if you dont have small Chinese hands, but finally installed motor, unfortunately for all the drama machine does not move up or down, only sideways, dont know what to do next can only check wiring, i wish i had some positive news, hopefully i can get help from light burn
Hi Berainlb sorry for long reply had house mods to take care of., finally installed the Nema 23 stepper motor and tested this morning, unfortunately no good news , laser will still not move up or down only sideways, hoping you can shed more light on this as i believe others have same problem Sam M
Hi Sam, thank you for coming back! I found a solution and wonder if it will be the same for you.
Check here: Red & Black 80W CO2 - Stepper Motor Replacement Options - #9 by soeighty7
Hoping this helps you buddy 
Swap terminal blocks 2A and 2B. Then test movement. Left and right buttons should cause up and down motion while up and down buttons should cause left-right motion.
What occurs?
If you get left and right motion but no vertical motion that means that either the replacement stepper motor is broken, the wiring is broken, or has been miswired. Checking that wiring is solid and correct.
Checked all the above no change, can it be the relay, if so how to check
Please elaborate. There should have been some change or else you have something else catastrophically wrong.
What exactly did you do, and what was the result?
What is the function of the relay? How is it wired to the rest of the system? Normally no relays would be involved in driving a stepper motor.
i will go back and test and check all again and come back to you tomorrow, maybe i missed something.
Hi Berainib check the results today moved terminals A and B and checked operation machine still only moves left and right even with up or down keys, will not move up or down, returned terminals to correct position…any thoughts Sam
What is this showing? What are the two sides of these connections going to? Can you describe how this has been wired?
Are you using color alone to determine what wires from the stepper motor are relevant?
Additionally, can you provide a link for the exact stepper motor that you got?
yes i am using color to match the wiring, attached is the motor i purchased, and copy of cut wiring purchased from nema 23 steppar motors online Alexnld.com wholesale shippers online.
[quote=“berainlb, post:66, topic:128079”]
- NEMA23 mount
- 2-phase
- 1.8 degree step
- 2.8A current
- 4-wire terminal
- 51 mm long body - this dimension is not critical as long as the motor otherwise fits
- bipolar motor
One thing that’s not clear but may be important is shaft size. Try measuring the shaft and finding a stepper with the same shaft size. Otherwise you could also just get a replacement pinion gear that matches the tooth profile.
I could find no other information on torque values or voltage tolerances.
Focus on the NEMA 23, 2.8A, 2-phase, bipolar, 4-wire, and match the shaft size. If you look for motors intended for laser machines this should get you something that should adequately work.
[/quote] 1. NEMA23 mount
2. 2-phase
3. 1.8 degree step
4. 2.8A current
5. 4-wire terminal
6. 51 mm long body - this dimension is not critical as long as the motor otherwise fits
7. bipolar motor
One thing that’s not clear but may be important is shaft size. Try measuring the shaft and finding a stepper with the same shaft size. Otherwise you could also just get a replacement pinion gear that matches the tooth profile.
I could find no other information on torque values or voltage tolerances.
Focus on the NEMA 23, 2.8A, 2-phase, bipolar, 4-wire, and match the shaft size. If you look for motors intended for laser machines this should get you something that should adequately work.
this is what you previously gave me in February