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Author Topic: changing FRO/feed speed(s) using M or G codes?  (Read 1849 times)

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changing FRO/feed speed(s) using M or G codes?
« on: October 08, 2012, 04:47:45 PM »
Hellot to all:

Using Mach 3, I am CNC routing foam reliefs using a 1/16 dia. bit that cuts 1" deep. I am finding that if I start a cut that goes straight to 1" deep and then moves horizontally too fast, I get a ball of hard, dried foam at the end. This is only a problem when I have a cut deeper than 1/2".

If I start the program at 50% of FRO, I don't have any issues....so, how can I (if at all) manually edit the G-Code so that the router would run at 50%, then after the first horizontal pass, run back at 100%? Thanks for any informed replies!

Offline Hood

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Re: changing FRO/feed speed(s) using M or G codes?
« Reply #1 on: October 08, 2012, 04:52:09 PM »
Just have the F word in your code at 50% of your normal feedrate for the first pass.
Hood