[FR] New Chopper Timing Preset Option For Noisy/Vibrating 0.9 Degree Steppers.

[Portzal]

On the back of #18286 (comment)
would it be reasonable to include another Chopper timing Preset tuned towards noisy/vibrating 0.9 degree steppers?
Possible Name "CHOPPER_09STEP_24V" (3, -1, 5)
After a full day of testing different chopper timing combinations I have come up with the following numbers.
CHOPPER_TIMING { 3, -1, 5 }
These numbers give a good balance between StealthChop, above 110mm/s noise levels starring to increase and
SpreadCycle, above 120mm/s steppers start to calm down.

@h3po did some testing with 3 different settings and posted the following video, https://youtu.be/A7GWkTTyzW0

[thisiskeithb]

Which stepper manufacturer/model numbers has this been tested with? It may not be universal for all 0.9 degree steppers.

[Portzal]

@thisiskeithb My machine has E3D Steppers, I believe it has worked with some other brands as well. It’s not aimed at all 0.9 steppers, only as a option if you are experiencing excessive noise or vibration with 0.9 degree steppers. It would probably need the inclusion of short explanation for the use of this preset.

[Portzal]

@boelle @thisiskeithb I have made the changes in my firmware and it builds successfully.
could I please get some feedback as to whether I actually have it set up correctly.
I will then work on following the guides and learn how to do a Pull request.
tmc_util.h

#define CHOPPER_DEFAULT_12V  { 3, -1, 1 }
#define CHOPPER_DEFAULT_19V  { 4,  1, 1 }
#define CHOPPER_DEFAULT_24V  { 4,  2, 1 }
#define CHOPPER_DEFAULT_36V  { 5,  2, 4 }
#define CHOPPER_PRUSAMK3_24V { 3, -2, 6 }
#define CHOPPER_MARLIN_119   { 5,  2, 3 }
#define CHOPPER_09STEP_24V   { 3, -1, 5 }  // <-- new preset

configuration_adv.h

• Optimize spreadCycle chopper parameters by using predefined parameter sets
  • or with the help of an example included in the library.
  • Provided parameter sets are
  • CHOPPER_DEFAULT_12V
  • CHOPPER_DEFAULT_19V
  • CHOPPER_DEFAULT_24V
  • CHOPPER_DEFAULT_36V
  • CHOPPER_PRUSAMK3_24V // Imported parameters from the official Prusa firmware for MK3 (24V)
  • CHOPPER_MARLIN_119 // Old defaults from Marlin v1.1.9
  • CHOPPER_09STEP_24V //option for noisy or vibrating 0.9 degree steppers new preset
  • Define you own with
  • { <off_time[1..15]>, <hysteresis_end[-3..12]>, hysteresis_start[1..8] }
    */

[thisiskeithb]

I haven’t tuned chopper settings beyond the defaults, but I assume it’ll need to be adjusted for everyone’s specific drivers & motor characteristics.

@teemuatlut would likely know more.

[Evg33]

Very cool !!!
Now there is no that nasty sound!
SKR1.4T + 2209 + 0.9/2A (StepperOnline 17HM19-2004S 0.9deg 2.0A 3.0mH)

[00xED]

Works nice. Tried it with SKR1.3 + TMC2208 + 0.9A (StepperOnline 17HM15-0904S 0.9deg 0.9A 12.0mH).

[freighttt]

To chime in, I have LDO 0.9’s but these values did improve things for me. I ended up adjusting mine further via the calculator but I do support adding the values posted. They definitely are a big improvement from stock.