shifting x,y

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jdunne
Posts: 13
Joined: Mon Oct 13, 2014 10:48 pm

shifting x,y

Post by jdunne » Fri Nov 07, 2014 6:30 pm

plate3.png
plate3.png (453.71 KiB) Viewed 865 times
Hey guys.

I have been trying to get consistent results sending code to shapeoko and having the entire run finish without it going a little "haywire" I seem to alway get some kind of shift in x, y or z somewhere during the run

this is the part I am trying to machine
plate1.png
plate1.png (299.41 KiB) Viewed 865 times
this is the result get
plate2.png
plate2.png (438.23 KiB) Viewed 865 times
This is the code
plate3.png
plate3.png (453.71 KiB) Viewed 865 times
It starts off great. But at some point the x.y seem to shift be .5 in or so.....

what can I look at? the board is cooled. the code is good, the gantry is smooth. The pulleys are tight.. I do not hear anything wrong... this is my 5-6 run and everytime something goes wrong at some point.....

ideas?

WillAdams
Posts: 8604
Joined: Mon Apr 09, 2012 6:11 pm
Location: Pennsylvania --- south of the Turnpike, East of US-15
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Re: shifting x,y

Post by WillAdams » Fri Nov 07, 2014 6:55 pm

Probably a belt is slipping. My suggestion would be to further tighten the belts and make certain everything else is tight.

I'm seriously tempted by the idea of wider belts....
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

jdunne
Posts: 13
Joined: Mon Oct 13, 2014 10:48 pm

Re: shifting x,y

Post by jdunne » Fri Nov 07, 2014 9:05 pm

thanks...

just retightened everything and re-running. we will see, fingers crossed.

Schruminator
Posts: 259
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Location: Littleton, CO
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Re: shifting x,y

Post by Schruminator » Fri Nov 07, 2014 9:52 pm

Belt or losing steps. Are any of your stepper motors of stepper driver chips (on the gshield) uncomfortably hot to the touch?
1.8m x 1.0m SO2 #3638 / Vectric Aspire / ACME Z-axis / View my photography at http://www.mschrum.com

jdunne
Posts: 13
Joined: Mon Oct 13, 2014 10:48 pm

Re: shifting x,y

Post by jdunne » Thu Nov 13, 2014 12:49 am

BTW... shifting pulley was the culprit. I retighten all belts and set screws, Found one that was stripped... after fixing, the machine is working predicably

Joe

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