max speed of M2

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airscapes
Posts: 260
Joined: Wed Jan 31, 2018 11:36 pm

max speed of M2

Post by airscapes » Tue Dec 04, 2018 9:29 pm

I just started a print and realized it was going much faster than the 50mmS I thought I had entered.. well I entered 500 mmS.. so what is the max speed that the machine will try and print when a way out of whack number like 500 is entered (S3D)
Thanks!
Doug

Fusion916
Posts: 41
Joined: Thu Mar 03, 2016 2:29 am

Re: max speed of M2

Post by Fusion916 » Wed Dec 05, 2018 3:54 am

I am interested in this answer as well.

airscapes
Posts: 260
Joined: Wed Jan 31, 2018 11:36 pm

Re: max speed of M2

Post by airscapes » Wed Dec 05, 2018 2:28 pm

The part was usable, not so accurate, but did get printed fast! :lol:

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ednisley
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Re: max speed of M2

Post by ednisley » Fri Dec 07, 2018 3:58 pm

airscapes wrote:
Tue Dec 04, 2018 9:29 pm
what is the max speed that the machine will try and print
There's a limit in Configuration.h:
https://github.com/MarlinFirmware/Marli ... guration.h

Code: Select all

#define DEFAULT_MAX_FEEDRATE { 300, 300, 5, 25 }
Multiply the X and Y values by 60 to get mm/min, as used in G-Code: 30000 mm/min.

However, that's for a single-axis motion, because the firmware's travel planner limits the speed so the slowest axis can keep up during coordinated motion.

The acceleration limits also kick in on relatively short motions (which are basically all motions in 3D printing), so the axes rarely reach top speed.

As the saying goes, don't believe the hype … or the speeds in the G-Code file.

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