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04-11-2018 #11
adding more detail to post 7 for any one wanting to use a BOB with opto-isolated outputs and stepper drivers with opto-isolated inputs
the problem with the BOB supplied as part of the kit is ue use of the slow PC817 opto-isolators used for the outputs
I would expect the DM860A stepper drivers would have a PC817 on the enable input and a high speed isolator like a HCPL2531 for the step and direction inputs
as used on this Tormach driver input
the diagram is from
https://www.cnczone.com/forums/torma...ml#post2107952
if I used a breakout with opto-isolated outputs then I would look for a BOB like this -
https://cnc4you.co.uk/resources/Brea...ard%20HG08.pdf
or this
http://www.electronics-lab.com/proje...r-cnc-routers/
they are just two of example found
JohnLast edited by john swift; 04-11-2018 at 12:23 PM.
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