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Author Topic: CNC router shudder and jerky / jitter doing 3D toolpaths  (Read 9058 times)

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Offline ger21

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Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #40 on: February 07, 2016, 02:40:21 PM »
There may be a tolerance setting in MasterCAM that determines segment length in g-code.
Gerry

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Offline stirling

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Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #41 on: February 08, 2016, 06:02:52 AM »
I create all of my geometry in Mastercam X4 and it also writes the GCODE as well. It seems to put out BOTH the G64 and G8 codes. I don't understand why it is doing this. It is saying; use CV MODE, then turn off CV MODE.

I don't use Mastercam but my guess would be that if you post your post file someone here will be able to take out the offending G8 line.

I also have no clue why Mastercam is producing so many lines of code. Could it be that my geometry in Mastercam X4 is fine but my post processor in Mastercam is what is writing the excessive amount of code lines?

Could be either or a combination of both I suppose. Regards the sudden change though, my guess would be your CAD geometry is suspect. Did you create it from scratch or did it start out life as a .dxf profile? That said though - if it's cutting ok now (with the G8 removed) - why worry.

Offline BR549

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Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #42 on: February 08, 2016, 10:34:41 AM »
HIYA Ian remember this is a 3d profile Cutting file not a flat 2.5d. It is really hard to get away from micro segmented lines and still have great detail in teh carving. 

AND YES if it works good now NO problems.

(;-) TP

Offline stirling

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Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #43 on: February 08, 2016, 11:01:29 AM »
Hi Terry - I don't think this IS 3D though. Check out the code he posted. There's no Z going on.

Whatever though - what I'm getting at is there's no reason (that I can see at least) why the lines SUDDENLY change length dramatically. Check out the pic I posted again, There's NO detail there that would require it. Maybe I'm wrong - just thinking.

Anyway - as we've both now said - it's working so it doesn't really matter.