Originally Posted by philba  don, I got some through a group buy a while ago - around $8. If you could find the name of the disti, I would be greatly appreciative.
edison (great screen name...) - Nice design, I like the way you allow source or sink for the optos. nice touch.
I have a couple of questions - no low pass on step and dir. Are you relying on the optos to form essentially a low pass filter? They (h11L1) are pretty fast optos so noise below 1 Mhz (maybe more like 2-5 mhz) would pretty much pass through. the schmitt triggers help there though.
Also, how well does your sync circuit work? It looks similar to one that I had played with (using cap decay for timing). I also tried using a cheap PIC which allows for reasonably good timing but the data sheet seems to say that there are cases where you shouldn't use sync (certain step angles, iirc) so I bagged it from my design. The PIC could, in theory, track the step angle but that was getting complex - I may still go back to it. It is interesting that you also use the sync signal to feed disable I wonder if you even need to worry about sync input to the 7062. |
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Can you please share available information for the subject matter I have recently bought 2 nos of second hand machine without documentation.
Condition of the machine is good and we need support on documentation side.
Detail of the machine are as below-
EDM machine
Make - ELTEE PULSITRON
Model - EP 30
Sl. No. 0721 & 845
Volts - 210/230/250/460
Ph. 3
Cycle - 60
KVA – 6
Please quote price of documentation available with you.
Tarun Sharma