Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: slowtwitch on February 20, 2012, 07:17:14 PM

Title: MDI Feedrate Problem
Post by: slowtwitch on February 20, 2012, 07:17:14 PM

Hello Folks, I really don't know if I'm posting in the proper forum, if I am, my apologies. Anyway, I have an issue with getting the proper feed rate in MDI. (Btw, I am running with a smoothstepper installed).  When I type in a G code ...for example  x4.00 F6 ...instead of 6 ipm, I get 75 ipm. Actually, it doesn't matter what feedrate i put in the MDI line, it always runs at 75 ipm. I had the mill running really nice for a few days. this problem just started today. Could it be a smoothstepper issue???? Any help would be appreciated :)

Almost forgot.. I'm running Mach3 R3.043.058 and have the newest smoothstepper drivers and plugin's..



thanks
pete

Title: Re: MDI Feedrate Problem
Post by: HimyKabibble on February 20, 2012, 08:23:34 PM

If you simply type "X4.00 F6" how fast it goes will depend on what move it made last.  If the last move was a G0, then it will ignore the F6, and move at rapid speed.  If you want the F6 to be respected, you have to MDI "G1 X4.00 F6".

Regards,
Ray L.

Title: Re: MDI Feedrate Problem
Post by: slowtwitch on February 20, 2012, 08:31:08 PM

Ray, thank you for the reply. I'm still very new at this cnc stuff and I had a notion that it may be some type of beginners error :)

I'll give it a go in the morning...

pete