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Author Topic: 4th axis movement with jerks in Mach3  (Read 209 times)

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4th axis movement with jerks in Mach3
« on: June 22, 2019, 07:01:23 AM »
Problem: With 4-axis milling, A-axis does not rotate smoothly, but jerks (twitches).
Watch the video: https://youtu.be/_HriYmDhB5I

With manual rotation, the 4th axis rotates smoothly.
Tell me how to fix this problem?

Thanks in advance!

System:
PowerMill  2019
Mach3

Offline ger21

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Re: 4th axis movement with jerks in Mach3
« Reply #1 on: June 22, 2019, 08:37:28 AM »
What does the code look like?
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
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Re: 4th axis movement with jerks in Mach3
« Reply #2 on: June 25, 2019, 08:13:29 AM »
Re: 4th axis movement with jerks in Mach3
« Reply #3 on: June 25, 2019, 08:48:20 AM »
Hi,
860,000 lines of code?

What happens if you just take the first 5000 lines and try running those?

Another thing you might try is tuning off the toolpath display. My guess is that the file is so big that the toolpath display
is sucking up all the CPU power.

Craig
My wife left with my best friend...
     and I miss him!
Re: 4th axis movement with jerks in Mach3
« Reply #4 on: June 25, 2019, 09:21:08 AM »
1,865,481 lines  :o
n line number start over
interesting file to read
yep joeaverage is right, computer cant do it all.
could try more memory and dedicated graphics card.
look like breaking it up in to smaller files would be the way to go, just takes some manual coding to end a section then create a new start for the next section.



« Last Edit: June 25, 2019, 09:22:50 AM by Ya-Nvr-No »

Offline ger21

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Re: 4th axis movement with jerks in Mach3
« Reply #5 on: June 25, 2019, 09:44:06 AM »
Turning off the toolpath display will likely fix the issue.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: 4th axis movement with jerks in Mach3
« Reply #6 on: June 26, 2019, 06:56:58 AM »
Hi,
Mach4 is more tolerant of very large files. It can take a while for it to draw the initial toolpath with large files
but thereafter various zooms and view rotations seem near instantaneous.

Craig
My wife left with my best friend...
     and I miss him!