Electronics > Repair

How to repair/replace very old Microstepping drivers in Torcam CNC

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Langdon:
I am almost certain that all 3 microstepping drivers are broken.

Everything else works.

The drivers must be at fault.


What would you recommend as a replacement?

The motors in the CNC machine are 4.6A DC stepper motors.

They have 200 steps/rev.

The power supply is 40VAC, 40VDC, or 120VAC

If necessary, I can hook up a 24VDC or 12VDC power supply.

timeandfrequency:
Hello Langdon,

As written above, I would suggest those :
https://www.omc-stepperonline.com/digital-stepper-driver-2-4-7-2a-18-80vac-or-36-110vdc-for-nema-34-motor-dm860t
You can hook them to the 40 VAC power supply.

But maybe wait another day if someone else on the forum might make a better suggestion.

Langdon:
I am in Ontario, Canada.
The seller must ship to me.

I am not going to deal with any company that charges $50 extra to ship to Canada.

What are your thoughts on these:

https://www.ebay.ca/itm/203996840791
https://www.ebay.ca/itm/375578234876

timeandfrequency:

--- Quote from: Langdon on October 29, 2024, 04:01:41 pm ---
https://www.ebay.ca/itm/203996840791 
https://www.ebay.ca/itm/375578234876

--- End quote ---

The 'DM556' should do it too, just take care that the input voltage span is lower than for the 'DM860T' I suggested above, and it's DC only (18~48V DC power supply).
Use small fans to blow on the heatsinks.

Langdon:
Do you think this driver will be poor quality?

https://www.ebay.ca/itm/203996840791

Should I buy one first to test if it is cheap junk and then buy 2 more if the first is good?

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