Hi!
This is my first post on this forum. I used to use Yahoo forum long time ago (equals to +10 years) when I started with Mach (maybe 1). For a certain reasons I've been recently quite lazy with my CNC applications and naturally with Mach as well. However, recently I found a small CNC mill (
Terco CNC 45) which I rescued and placed it into my basement thinking to rebuild it.
I got a Chinese breakout board for the project and my questions concerns exactly that one.
I cant find any manual for it but if I paste some links here about it, maybe someone can recognize it (
from another forum)
Somebody on that forum says that he/she had managed to get the thing working. However, I have not had that much good luck.
The problem I have here is, that the board converts my signal (flips it upside down). I get pulses nicely in to the board, but the smith triggers (those three chips) sneaking on the board are giving a halterneck to the signal throwing it upside down. this signal is then something the stepper driver do not understand and it does nothing.
If I change active low in mach configuration, everything on the BO board works fine till the optocouplers. A very short negative pulse does not seem to come through.
If the BO bord is really functioning like it designed to, I just can't get what I'm doing wrong.
I'd really appreciate if I could get some hints for this.
I was thinking to try by replacing smith triggers with non-converting ones. But at this stage it'll take time since all stores (selling chips) are closed till 7th Jan due to a holiday season.
Thanks,
Juha
(from Finland)