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Re: 4th axis question
« Reply #10 on: December 17, 2010, 12:03:37 AM »
by the way, the G code is so big because I had to turn coordinate modal off in VM or it caused other issue's with this model.

Offline Greolt

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Re: 4th axis question
« Reply #11 on: December 17, 2010, 02:47:12 AM »
Looks like fairly poor code but that may be because we are only seeing a small section.

Try some basic code like this and see if you get a better result as far as A axis feedrate is concerned

G21
G1 Z25 F500
A90
Z50
A180
Z75
A270
Z100
A360

A axis feedrate should decrease as Z height increases.

I made this in metric because I think you said that is your native units.

Greg

EDIT:  I reread your posts and maybe your native units are medieval english.  :)

If that is the case then try this code instead.

G20
G1 Z1 F20
A90
Z2
A180
Z3
A270
Z4
A360
« Last Edit: December 17, 2010, 03:02:06 AM by Greolt »
Re: 4th axis question
« Reply #12 on: December 20, 2010, 12:08:27 PM »
Thanks Greolt, radius correct work fine with basic code like that, Z height, then rotate. Were I'm having trouble is when A axis is rotating while Z is moving at the same time. It should work the same shouldn't it?
Thanks,
Ray

Offline Greolt

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Re: 4th axis question
« Reply #13 on: December 20, 2010, 07:07:50 PM »
My understanding is that the feedrate correction will update with each line of code.

It's possible that my understanding is not correct.

I have not seen this issue but that might be because I do not machine jobs like cams.

Zip up your code and post, and I will run it here to see if I get the same result as you.

Greg