Anyone know how to calm a printer down who seems to be printing at

3D Printing
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1

Anyone know how to calm a printer down who seems to be printing at faster than defined sliced settings?

Sliced at speed of 40mm but seems to be printing at 80-90mm…

[ Mendel90 / e3D hotend / marlin / slic3r RC 3 / Pronterface ]

2

There’s a gcode to set a max speed that the firmware will not exceed even though the gcode speed command is for higher. Someone posted it in an answer a few posts back.

3

I found one: M201 but not sure if that’s the right one… Can anybody confirm?

4

Or at least confirm the correct usage of M201? If I wanted to max speed at 50 would it be: “M201 X100 Y500 z500”?

5

M201 is acceleration, not speed.
I think you’re looking for M203: http://reprap.org/wiki/G-code

6

M220 command is to modify the speed.Use M220 S100 to set it to 100%.
But a printer reset should reset the speed factor as well.

7

I’m a little nervous to try and play with the gcode right now as it’s printing away nicely on Emmett’ new heart and I don’t mind the speed right now, just nervous that the shifting may jump back into play and a possible jam… Crossing fingers I didn’t just jinx all the fixes I was able to pull off today…

Thanks for all the help here guys!

8

@Mathias_Dietz I’m no gcode expert, so this is a real question:
If I’m going at 40mm/sec, then I send an M220 S75, then the gcode I’m printing sends a speed command to go to 200mm/sec, won’t I now be at 150mm/sec?
I think M203 sets the speed ceiling. So, if I set the max speed on X and Y to 50mm/sec, and the gcode I’m printing then sends a speed command to go to 200mm/sec, then I will be at 100mm/sec. Am I completely reading this wrong?

9

@Carlton_Dodd you are right with the m220 example. M220 S75 would set the speed to 75%, if you send 200mm/sec you will end up with 150mm/sec.
M203 will just cap it at the limit. when you set the max speed to 50mm/sec it will never use more than 50.
When you use m203 and m220 together I’m not sure which one is evaluated first, therefore I don’t know what happens.