Originally Posted by unterhaus  Halfnutz, I have a suspicion that these drives were actually designed by Yaskawa. They look the same other than the plastic of the front panel. What breakout board do you use? Most breakout boards don't have isolated outputs since the majority of them are driving geckodrives that have isolated inputs. You are probably right about the serial cable supplying ground.
Figure 6.33, page 6.114 shows pins 2 and 4 of the drive connected to the PC ground. Pin 16 and 14 connected to the step/dir, and pins 17 and 15 are not connected.
PC parallel ports are horrible at driving things, efrem should get a breakout board. |
I just use any breakout board that provides additional current, ie a place for a wall transformer, I geusse some have a transformer on board but the ones Ive used were both from that Hubble's CNC on eBay, theyre only 25 bucks.
You probably have a variation of SDGM or SDGH amp, the Sigma 2, I think Yaskawa makes them for everyone. On it I think I had to reverse the signals for some reason, no I just checked one, just + Step & Dir to the Step & Dir outputs of the PC and then ground the other ones, pins 15 and 17 I bet need grounded, try changing logic in the control software from negative to positive logic also or vs/vr.
Yes, its negative logic on the one I'm looking at. There is no parameter change on the newer ones, it should work if you have enough current from the LPT or brkout brd. On one I had it would work fine by itself but with others connected it wouldn't work without the added current.