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Author Topic: IPM of table does not match (F)eedrate  (Read 1751 times)

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IPM of table does not match (F)eedrate
« on: March 07, 2013, 02:51:11 PM »

My background is software development... I've *finally* gotten my MAXNC CL10 working with MACH3 (which was no small feat). I'm in the process of confirming that the MAXNC table is 1:1 with MACH3...

The table X/Y/Z seems to be dead-on correct with the SRO of MACH3... however, when I issue the following command:
G01 X4.0 F4.0
In order to move the table 4 inches to the right at 4ipm feed rate... it takes 1:23 to do so. In my development world this is unacceptable... however, I have no machinist background.... shouldn't the actual feed rate of F4.0 be  *close* to 4 inches per minute on the table?

Again, keep in mind this is a MAXNC... where probably all bets are off...

Just looking for some feed back... AND, if there is some setting that I can fool with in MACH3 please let me know... Steps are set to 8000 (and as mentioned) seem to be correct distance-wise.

Thank you for your help!
Re: IPM of table does not match (F)eedrate
« Reply #1 on: March 07, 2013, 03:12:32 PM »
Increase your  acceleration setting to achieve closer times, but if you are measuring from a stopped position, it can't go 4 inches in one minute due to both acceleration and deceleration.

Re: IPM of table does not match (F)eedrate
« Reply #2 on: March 07, 2013, 03:27:49 PM »
Ahhh, of course, makes sense John!
Thank you!