SANYO DENKI -PMM - MD- 53031-10 PM (5-PHASE STEPPING DRIVER) on eBay

[alanambrose]

Hi,

FYI there's some of these cheap on eBay if anyone wants spares. I've bought a couple but have not tested them and the supplier can't give me the provenance - so anyone's guess whether they're good or not. They do look new though. There's only one up there right now but I think the supplier has a bunch. e.g.

https://www.ebay.co.uk/itm/SANYO-DENKI-PMM-MD-53031-10-PM-5-PHASE-STEPPING-DRIVER/363206181301

Alan

[sheaton]

I purchased one (the buyer offered at £40 each).  Unfortunately I received the PMM-MD-53030-10 (opto-input) rather then the  PMM-MD-53031-10 (COMS input) version.

The seller accepts the mistake and has accepted my return, but I am tempted to keep the module for the spare power hybrid.

BTW I cannot identify the optos on the pcb, so I suspect they are encapsulated in the smaller hybrid module adjacent to the input connector.  The input connector for the step pulses is different also between the two versions of the module.

[Mike]

The hybrid is the most likely thing to fail, though the only one I know of ever failing is my one, presumed to be due to a wiring short which I never actually found.
I have a few spare hybrids. They can also sometimes be repaired, at a pinch...
https://www.youtube.com/watch?v=DGqH8LGjZdY