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Z axis MAX_FEEDRATE

Posted by RickRap 
Z axis MAX_FEEDRATE
November 04, 2019 09:50AM
Greetings

Having an issue with max feedrate in the Z axis. Marlin appears to be ignoring my setting for this.

In the past, I could set DEFAULT_MAX_FEEDRATE as (1000, 1000, 100, 25). And if I threw a G1 Z10 F5000 at it, Z would only move at 100. That doesn't appear to be the case and Z is trying to move at 5000 - which it can't so it stalls.
I've had this problem in the past and I fixed it, but I don't remember how. The problem is that default feedrate in gcode (from Slic3r) is 7800. For now, I have custom gcode to set default to 800 (G1 F800). But I haven't had to do that in the past.
Re: Z axis MAX_FEEDRATE
November 04, 2019 02:07PM
Have you sent M502 and M500 to update the values in the eeprom ?
Re: Z axis MAX_FEEDRATE
November 06, 2019 11:13AM
Quote
obewan
Have you sent M502 and M500 to update the values in the eeprom ?

Thanks for the tip. Tried that. Still no dice.

does G1 Z10 F5000 override DEFAULT_MAX_FEEDRATE? If not, I would expect that even with F5000, the feedrate would be clipped at the default max
Re: Z axis MAX_FEEDRATE
November 06, 2019 11:28AM
Figured it out. DEFAULT_MAX_FEEDRATE needs to be really low for Z. I set it at 20 and that works fine.

Now I have this thread to remind me in a year when I forget winking smiley
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