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Author Topic: CNC router shudder and jerky / jitter doing 3D toolpaths  (Read 9965 times)

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Offline BR549

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Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #20 on: February 06, 2016, 03:16:55 PM »
Don't believe everything you read about Mach3    :o 8)
Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #21 on: February 06, 2016, 03:19:37 PM »
Hahaha.... Yeah I'm very very quickly learning that.... Everything I read seems to be turning out to be wrong...

Aghhh.... I hope someone will keep their eye on the manuals for m4 and keep them current and useful
Rob

Albert Einstein ― “If you can't explain it to a six year old, you don't understand it yourself.”

Offline RICH

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Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #22 on: February 06, 2016, 03:20:08 PM »
So need to pencil in another G code on to the cheat sheet!  :D

RICH

Offline RICH

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Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #23 on: February 06, 2016, 03:21:14 PM »
Maybe we should put the G8 command on the "Did You Know This" thread.......

RICH

Offline RICH

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Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #24 on: February 06, 2016, 03:23:15 PM »
Oh, BTW,
That's why they keep Terry around.....he knows where the poop is!  >:D

RICH
Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #25 on: February 06, 2016, 03:26:20 PM »
I think I've learnt more from him in the last few weeks than I have reading stuff... <><><>removes hat
Rob

Albert Einstein ― “If you can't explain it to a six year old, you don't understand it yourself.”
Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #26 on: February 06, 2016, 04:06:17 PM »
From the Mach4 manual Rob posted:

"G09 – Exact Stop: G09 is a non modal exact stop. Machine accelerations cause
corners to be slightly rounded; when a true sharp corner is required G09 should be
used. Although similar to G61 in function, G09 is not modal while G61 is."

Is this the equivalent of G08 in Mach3 ?

(bowing w/hat removed as well)
Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #27 on: February 06, 2016, 04:15:39 PM »
http://www.machsupport.com/forum/index.php/topic,25975.msg183136.html#msg183136

"Right now, G8 is equal to G61 (exact stop) and G9 is equal to G64 (cancel exact stop).

Same as Mach3."

???

Offline BR549

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Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #28 on: February 06, 2016, 04:28:02 PM »
AH GEE Do I gotta give up teh magic monkey dust again  >:D

In mach3 G8 and G9 are the same as G61 G64.

In Mach4 G9 changes to a one time Exact stop move and I hope that G8 is not there any more.

now for the next lesson when it is late at night and you can't sleep simply bring up teh MDI line and start from G0 and keep going up till you reach G1000. IF you see it does not error (;-) then it must do something, THEN you figure out exactly what it does do (;-) You MAY find some things that carried over from teh original EMC code.

Same with #vars (;-)  I created a serach program in CB that prowled all teh Variables up to 30,000 to see what might show up. Then compared the OLD EMC code with Mach3s code references to see what might be lurking there.

Same with Mach3's CB editor. You would be surprised what works based on Visal Basic calls  and is NOT in teh Mach3 CB manual.
Re: CNC router shudder and jerky / jitter doing 3D toolpaths
« Reply #29 on: February 06, 2016, 04:39:53 PM »
Flippin' n' a floppin' .... gotcha   ;)

(i'll take an ounce of that there monkie dust, put it on mu account  ;D )