Re: strange servo movement

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "azzi_b" <azzi_b@y...> wrote:

> I have now installed the rutex drives and campbell board into my

b/p

> series 1 cnc. I am however having a perculiar thing happen on the x
> axis. The axis will travel fine for a short period, then stop and

go

> the other way.
>
> Anyone any ideas !!!
>
> thanx
>
> Aaron

Hi,
I'm using also rutex drives with mach 1 and a selfmade router
(prototype),
i have a few points to check.

1-check your encoder wires and wiring (false contacts-bad cable-
connections...)
2-check you drive, change them with a working one(to be sure)
3-check your encoders with an osciloscope(change them also )
4-be sure to keep motor cables and encoder cables separate
5-motors need a very good grounding and also a shield
6-use quality cables
7-rise the pulswidht in mach 1
8-change the step and dir pin outs on the breakout board
9-are you using ttl or differential encoders? ttl encoders pics up
more external noise(you have to keep encoder wires very short)with a
differential encoder you can use a larger cable(up to 100 m,correct
me if i wrong)and you can us a twisted one .


if the encoder is a ttl output you can buy a rutex line receiver.(or
us digital)

the big point that i think is external noise.
(i've got also the same problem,a lower the velocity to 2,5 meters pm
it runs very smooth now(before i set the velocty to 5m and it gives
the same problem like you)