TOS-KURIM CNC Upgrade

[Clive S]

The only other thing I can think of that's different from previously is that I extended the encoder cables. I have double and triple checked the wiring is correct and swapping A and B has no effect.

I would have thought that this SHOULD have some effect as have been mentioned way back in the post like runaway.

I don't know your drives, you mention cat5 do the drives have a RJ45 connector or hard wired ? I have seen many times that using the RJ45 with crappy plugs the pins don't always connect.

Keep at it you will get there.

[Muzzer]

I would have thought that this SHOULD have some effect as have been mentioned way back in the post like runaway.

Indeed - so first check that the encoder is talking sense. Given that the position error stacks up and finally trips the drive, it sounds so. But as as you say, swapping encoder phasing should have done the trick. So start from the beginning, one step at a time......

[JimJam]

I would have thought that this SHOULD have some effect as have been mentioned way back in the post like runaway.

I don't know your drives, you mention cat5 do the drives have a RJ45 connector or hard wired ? I have seen many times that using the RJ45 with crappy plugs the pins don't always connect.

Keep at it you will get there.

Yes, two RJ45. One for the encoder connection and one to the motion controller. Just to add another potential issue, it has a differential line driver, which from what I understand converts single ended to differential signals. The encoder is hard wired to the line driver which then has an RJ45 plug on the other end which then goes to an RJ45 on the motor driver.

I also made up all of the cables with the RJ45 plugs on, I did test them all before installing them but I guess that might not be a bad place to start looking for bad connections as well.

The only major change I made from when it was running was the encoder wiring, so I'm hoping its something silly like a bad connection!

Thanks for the help guys, I'll get stuck into it again tonight and see what I can find.

[Clive S]

I also made up all of the cables with the RJ45 plugs on, I did test them all before installing them but I guess that might not be a bad place to start looking for bad connections as well.

OK. Did you by any chance use the type of RJ45 that has a slot at the front that lets you pass the wires through then crimp then trim off the excess.

If so I have used them and chucked them out. Recently I made a 20Mtr patch cable (not cnc related) checked it with a cat5 tester that showed the errors. I did a continuity test pin to pin and it was fine.

But putting it into place it would not work. It turned out that the pins would not mate into the sockets properly.