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Author Topic: helix toolpath problem...  (Read 2301 times)

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helix toolpath problem...
« on: May 05, 2010, 10:26:29 AM »

Since a while I am having a problem with some helix toolpaths, generated by mastercam x4.

The problem occurs when milling a hole slightly bigger then cutter diameter, so with a small helix spiral.
For instance when milling a 4 mm diameter hole with a  3 mm cutter.
When the hole is a little bigger, say 5 mm the problem doesn't occur.

Actual problem: At the first part of the toolpath everything is normal, about half way the machine starts moving jerky and speed decreases.

Tried different cv settings, didn't help...

Anybody any suggestions?




Offline BR549

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Re: helix toolpath problem...
« Reply #1 on: May 05, 2010, 12:07:28 PM »
Just some thoughts,

 HOW is the gcode being generated? , Arcs or straight segments?

What do you have setup for Look ahead ?  200 works good for basic 3d moves

If small segments then maybe your computer is slow and cannot keep up??

Can you give a code example .
« Last Edit: May 05, 2010, 12:09:41 PM by BR549 »
Re: helix toolpath problem...
« Reply #2 on: May 05, 2010, 02:54:20 PM »

The code consits of small segments.

LookAhead is only 20 right now, I'll change it to 200 or 300 and have a go.
(In a day or 2, busy with work till the weekend... >:D)