Help me understand interpolation and noise
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I was playing around with my Z leadscrews. My hypothesis is that using x1 microstepping and x16 microstepping should behave the same if interpolation is enabled. This proves to be wrong, when moving at the same speed, using "M350 Z1 I1" makes a ton of noise while "M350 Z16 I1" is very quiet. (of course when I reconfigure these I am also changing my steps/mm, I didn't forget)
Shouldn't interpolation make the movements sound the same no matter what microstepping setting I use? Do I have unrealistic expectations?
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@frank26080115 Interpolation is only applied when 16x micro stepping is used.
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@deckingman said in Help me understand interpolation and noise:
@frank26080115 Interpolation is only applied when 16x micro stepping is used.
That's correct, for the Duet WiFi/Ethernet. On the Duet Maestro, interpolation to x256 is supported from any microstep setting.
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
@dc42 said in Help me understand interpolation and noise:
@deckingman said in Help me understand interpolation and noise:
@frank26080115 Interpolation is only applied when 16x micro stepping is used.
That's correct, for the Duet WiFi/Ethernet. On the Duet Maestro, interpolation to x256 is supported from any microstep setting.
One learns something new every day.............
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arg, well, every time I make a mistake, the reply in the gcode console gave me a nice warning, this time it didn't so I thought it was ok
I also tried to turn on stealthChop on the TMC2660 and got a nasty surprise lol
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@frank26080115 said in Help me understand interpolation and noise:
I am also changing my steps/mm
If you set your steps per mm and microstepping to be for x16 first, you can then change the microstepping on a later line without having to manually change the steps per mm, as the firmware will take care of it for you.
https://duet3d.dozuki.com/Wiki/Gcode#Section_M350_Set_microstepping_mode
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@frank26080115 what was the nasty surprise?
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@kungpaoshizi said in Help me understand interpolation and noise:
@frank26080115 what was the nasty surprise?
TMC2660 doesn't have stealthChop
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Interesting.. I can say on x16 with interpolation, it's quite quiet. I can no longer tell when the printer starts printing compared to my old ramps 1.4
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High microstepping, or interpolation, makes the motors much quieter when moving. It does not affect motor standstill noise.
