Search found 13 matches

by balbs
Sun Jan 13, 2019 9:11 pm
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

I went through and hard mounted the steppers, removed the springs and bolted in place so they cant pivot anymore. I also applied lubricant to the gear racks and halved my accel value. With those changes nothing changed in the growing of the parts. They are still coming out oversized. I also went thr...
by balbs
Wed Jan 09, 2019 5:51 pm
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

When i cut squares (6" 8" 10" and 11") they have all come out correct in size.
by balbs
Wed Jan 09, 2019 12:58 am
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

I just sent you a copy of the job file as well as 2 of the gcode files I was using. I really appreciate the help.
by balbs
Tue Jan 08, 2019 8:23 pm
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

Thanks, So I was very close for the steps per in and even then the part grew by over .125" I ran it with a tape measure over 40 inches and it was within .0625 which is likely due to the end clasp being loose. I can send you the sheetcam save file to take a look at if you think that will offer a...
by balbs
Tue Jan 08, 2019 5:45 pm
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

Its direct drive. No reduction
by balbs
Tue Jan 08, 2019 5:43 am
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

Are you any good at calculating steps per in off the gear rack specs? I was also thinking about upping the microstepping which if I'm thinking correctly would reduce the error percent of the calculation. Currently running at 1/10. Was thinking I could at least go 1/16. My gear rack specs: RSHC101500...
by balbs
Sat Jan 05, 2019 9:44 pm
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

Tried the segments and it made no difference at all. Confirmed again that it was going back to the same spot after cutting the file and it is. I am sort of at a loss here. I manually jogged the machine to the top of the part using the gcode visualization window on mach3 and then put the template for...
by balbs
Fri Jan 04, 2019 4:13 am
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

I am assuming that (.01) is a variable? I am currently running in inches, do I need to make that number smaller?
by balbs
Fri Jan 04, 2019 4:12 am
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

Any other ideas as to what could be going on? Doesnt make sense to me at all.
by balbs
Thu Jan 03, 2019 9:33 pm
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

Yes. are there any posts for mach that will do line segments as opposed to arcs? I know ill lose cut quality most likely but its worth a shot.
by balbs
Thu Jan 03, 2019 8:14 pm
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

Yes, I have tested in ability to return to the same spot at a range of speeds and feeds including the speeds I cut at.
by balbs
Thu Jan 03, 2019 6:10 pm
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

Re: parts with arcs grow

I can rapid the machine at 2000IPM with accel at 150 all around the machine darting back and forth and it will still come right back to the end stops consistently. Current I have it turned down to 400IPM and i think 30ish accel. The parts only seem to grow if there arcs, squares cut just fine.
by balbs
Thu Jan 03, 2019 5:46 am
Forum: Problems and questions
Topic: parts with arcs grow
Replies: 25
Views: 11541

parts with arcs grow

Having some issues with my DIY water jet that really doesn't make sense and I am curious if you guys can give me any feedback or anything I can try. Currently the steps per in are near perfect to within a few thou. If I cut a square the part dimensions are perfect. However I am cutting a bracket for...