Missing Steps - Cant Print SpreadCycle StealthChop tuning help
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I dont know if it helps but I am installing reprap on a SKR2 board with tmc 2209 and I have same issue, specially on my bed which runs on a 0.9 degree motor, beside m extrusions are not consistence either. you guessed it right, there is a 0.9 degree motor on extruder. now good thing about SKR 2 is that I can go back and fort with marlin and reprap and compare. this is definitely firmware issue. Reprap runs these motors much quitter and cooler while marlin runs warm and a little noisy. but marlin runs very solid and sound is not really that bad. this tells me reprap and marlin use different pwm settings on stealthchop and marlin made some sacrifice in noise to gain some stability.
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@sinole Are you sure you are running the steppers at the same current setting with Marlin and RRF? What values are you using in each?
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@gloomyandy I divide my rated motor current by 1.414 and I use that number * 0.8, I have posted same question on your Github btw. for example for my 17HM19-2004S1 motor which is rated at 2A I use 1.25 A
in firmware.
dc42 says that 2209 have issue with 0.9 degree motors because they have high inductance, but this motor have less inductance than some 1.8 motors , that is why I chose it.I don't have access to my config at the moment but I want to post it for you and I appreciate if you take a look at it.
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@sinole You didn't answer my question though. What current settings did you use in Marlin and what did you use in RRF?
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@gloomyandy the current setting that you told me seems to be working better, motors runs a bit hot though. I don't think my z motors were really designed for 1 amp per LDO datasheet when I bought them, hey get scalding hot even when I set them at 450 on reprap.
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@sinole If you are not getting missed steps on Z then just lower the current and/or set the motor standstill current using M917.
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