Reply to this email directly, view it on GitHub You are receiving this because you were mentioned. The other good question is why is the watchdog not kicking in and resetting Suspect, because if you do not use filament and run it as a dry run it You can also isolate the extruder motor as the My testing is showings that this delay does matter, and gets to make the Threshold a lot of bizarre things can happen. Power motor than the board was tested on. While this setting is usefull for sensing the end pointīreak, it is indicative that Select Mini is using a considerably lower 11Ω whichĪccording to chapter 8 of the TMC2209 datasheet is for sensing a motor ofġ.7A and higher. BTT SKR e3 board has the r26 and r27 resistors set to. Il giorno, alle ore 19:00, minosg apologies I was looking at the wrongĪs for the the problem appearing to every user, that should not be theĬase. Problem will arise (however it will require some work to mount the board in I’m just trying to swap the board with an skr 1.4 turbo that I got forĪnother printer, it has. Playing with the MINIMUM_STEPPER_POST_DIR_DELAY/MINIMUM_STEPPER_PRE_DIR_DELAY and overriding the driver default of 20nSĭoes marlin have a velocity ramping configuration parameter?.Setting the hybrid threshold to a value, that when the extrude changes direction suddenly it falls to spread cycle.( Not certain how Linear advance will respect that ) To my understanding this issue could be addressed by: To resolve the problem, please use at least a tiny velocity ramping, when hard stopping the motor, e.g. The result is an overcurrent, and the motor driver goes to overcurrent switch off, until it becomes disabled / enabled again. As stealthChop is a voltage based chopper, it cannot respond to this at once, like spreadCycle. A hard stop will cut away motor back-EMF at once. When using stealthChop, please always make sure, that you use velocity ramping. > 0.5 RPS to 0)Īn abrupt change of motor velocity (Step frequency goes from a higher value to a low value within a single step). I will report back if the problem re occurs after some more prints.Ī hard stop of the motor in stealthChop (Step frequency goes from a higher value, e.g. *board fully locks up and doesnt respond to usb commands via pronterface or from the malyan m200 screen attached. *256k version and 512k version show the same fault regardless of environment used. *i have also tried setting the extruder to spreadcycle mode to rule out the problem where stealthchop triggers a lock up when moving to fast in one direction and then the other as suggested by others on the forum. *linear advance and hybrid theshold are turned off to rule those out completely. *Driver monitoring doesn't report any overheat prewarn triggers. i can confirm the PSU is not at fault.I have tried a powerful and more reliable 12v 750watts ATX monitored PSU and noticed no change in voltage drop when print fails, power fluctuation of max 0.2 volts either side of 12volts when in use. Note the jumper cap is removed from the board as its set in firmware and not required when using uart mode some people have not taken the cap off by default but confirm the problem still persists. Someitmes it freezes sometimes it finishes prints just fine. Replaced the board, same problem i have tried different suppliers and same problem occurs. (cooldudie2) all the users i have been in contact with have experienced the same freeze up issue using the firmware i have written, as well as their own compiled firmware based on bugfix 2.0.x branch and newest marlin 2.0.5.3 branch.Īfter replacing my mp select mini board with an e3 mini skr board sometimes during a print the board completely freeze with heater on and fan on. I can confirm the exact same errors, as well as a lot of MP SELECT mini users using the Skr mini e3 1.2 mod i uploaded to thingiverse.
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