Weird things happening

[ron yurkowski]

Need some help setup a job on my Helix 24X18 to engrave house numbers on a 18X12 granite tile .Run a sample on a brown paper works perfect put the granite in engraving from bottom up get to about 6 1/2 inches up and the print goes off line by 7/8 on a inch little wavy then it runs straight .Stop the job send it home of home in the X by 7/8 inch shut of laser restart run a small box it is perfect.Run another test this time off by .050 .Epilog said could be a bad encoder strip change that same thing. Any one have this problem. Will add photos if that will help to see what is happening

[Michael Hunter]

Encoder strip sounds likely - give it a clean and blow out any dust from the sensor that bridges the strip.
(The sensor faces down so you can't see if it has fluff in it - so blow it out anyway).

If that doesn't fix it -

Problem with the X-motor?
Something jamming the X-bearing or the belt : does the carriage move smoothly?

[ron yurkowski]

Hi I put a new encoder strip in cleaned everything the carriage moves smoothly belt moves smoothly can do small runs no problem this is 18X12 weird part is did the sample run perfect the next one not so good .

[Dan Hintz]

When you cleaned your encoder strip, did you try flipping over the cable that goes to the encoder? If that fixes the problem for an extended number of runs, get a new cable.

[ron yurkowski]

Flipped the cable ran same project 5 times worked every time finally got the granite piece done only took 3 attempts.
live and learn who would have know that the wire would only effect the job in. Certain area

Thanks for the advice