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Author Topic: V CARVE TOOL PATH  (Read 6038 times)

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V CARVE TOOL PATH
« on: February 17, 2012, 12:30:44 PM »
hi
i have a k2cnc with gecko g540 running with mach3 2ghz cpu and 1 gig of memory

i am trying to v carve a harley davison emblem was programmed with bobcad looks good in graphics and look good on mach3 graphics but when i run on router the tool path looks
good and then it will totally go off course and cut letters away and will just end up with pocket it will repeat the same every time. I can just do regular 2d engraving with no problem.

any help would be very much appreciated

 :(bob

Offline Hood

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Re: V CARVE TOOL PATH
« Reply #1 on: February 17, 2012, 01:55:15 PM »
Sounds like you may be having issues with the motors stalling but if you want to attach the code and your xml I will check them over to see if I can find a config issue.
Hood
Re: V CARVE TOOL PATH
« Reply #2 on: February 17, 2012, 02:18:36 PM »
hood thanks for reply i will attach my xml file and the code i am using
i have i guy i am doing this for and it has been driving me crazy
thanks
bob

Offline Hood

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Re: V CARVE TOOL PATH
« Reply #3 on: February 17, 2012, 04:15:01 PM »
One thing I see in the xml is you have MPG 1 2 and 3 set up and have them as the same pins as your limits. Best to disable the MPG's if you dont have any or if you do then you will need to set to other pins.

Dont see anything obvious that would be an issue other than the above, and that shouldnt really make motors stall. I do notice the X axis is on the max for velocity at the 25KHz kernel so might be worth trying at 35KHz.
Hood
Re: V CARVE TOOL PATH
« Reply #4 on: February 18, 2012, 10:55:55 AM »
hood
i turned off the mpg no change as you thought but before i had adjusted the volocity i just thought i would
try some of my old vcarve programs and they work without any problem,the only diffence they were lot bigger
parts aprox 3inchx5inch the harley logo is about 1.2inch x .900inch i am thinking mach3 won't handle the smaller
arks what do you think.
bob

Offline Hood

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Re: V CARVE TOOL PATH
« Reply #5 on: February 18, 2012, 11:03:42 AM »
Mach handles arcs no problem.

Try reducing your vel and accel by half for a test, did you try at the 35KHz kernel?
Hood
Re: V CARVE TOOL PATH
« Reply #6 on: February 19, 2012, 09:13:48 AM »
i have not yet tried 35khz kernal but i will  and also try adjusting vol and accal now that you say mach3 will handle arcs
midden1
Re: V CARVE TOOL PATH
« Reply #7 on: March 19, 2012, 10:17:40 AM »
i finnally got caught on my prodjects
andi tried 35k kernal but was no help if i made the drawing 2 times larger it worked fine

midden1

Offline RICH

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Re: V CARVE TOOL PATH
« Reply #8 on: March 19, 2012, 12:21:03 PM »
Think your steppers are skipping. So lower your velocity and accel as Hood suggested.....50% to start.
If it skips, is it random or rather consistant?  ie; same line in the program, during a rapid move, once during the program, etc.
If stepper skips the end result is usualy some lost position ( it seems to recover ) OR complete loss of position in that it goes off on its owne.

RICH
Re: V CARVE TOOL PATH
« Reply #9 on: March 19, 2012, 01:03:30 PM »
skips in different places all the time this part has a lot of code with .001 or less move in both directions but it will run bigger parts no problem all the time but i will try adjusting accel and velocity

midden1