Adjusting PWM frequencies to better match FDD8780 MOSFET spec.
- Hotend PWM frequency increased from 488.28 Hz to 1953.12 Hz
– Referencing the Forward Bias Safe Area from the hotend MOSFET's datasheet, this value should be safer.
- Hotbed PWM frequency increased from 7.26Hz to 30.48Hz
- Use software PWM for fans to reduce whine
– The higher PWM frequency works well with the stock parts cooling fan and might allow for better control of third party fans
Lowering the safety margin of MAXTEMP to 10°C and raising MAXTEMP to 285/135.
Resulting in a limit of 275°C for the hotend and 125°C for the heatbed.
Referencing #23
Improve USB printing by slowing down on certain situations. This prevents the buffer from running empty and removes the need to wait for new serial commands.
As a possible fix for the bug with Cura's end Gcode as described in
issue #7, I changed the leveling state to be disabled after homing since
Cura uses X homing in their end Gcode.
While adding ENDSTOP_NOISE_FILTER, I try to reduce the impact on accuracy as much as possible by reducing the endstop_poll_count to 2.
Possible fix for #8.
Thanks to @notching, @mensikv and @md66pt for the valuable feedback!
Thanks to feedback from @DerDominik I was made aware that Anycubic's default acceleration values in their source code are different from the ones they use in their compiled firmwares. Seems like insufficient torque on the Y-axis caused step loss on TMC2208 for that reason.
Co-Authored-By: DerDominik <derdominik@users.noreply.github.com>
Thanks to some great feedback from @RolandRosenfeld I did some small tweaks:
- Adjusted auto PID tune parameters
- Replaced manufacturer PID values
- Minor changes to the readme
- Raised retraction on G26 Mesh Test
- Merged latest bugfix from derhopp
- Added latest hex files
Co-Authored-By: Roland Rosenfeld <roland@spinnaker.de>
To further optimize print quality even at very high speeds (I aim for roughly 80-100mm/s), I enabled S_CURVE_ACCELERATION and tweaked the jerk and default acceleration values.
Note: This is still in testing. As soon as I finish and it works as I like, I'll push it onto the master branch. If you see this commit on the master branch, it's safe to flash.
Since a custom fan duct caused the heat block on my printer to cool down enough to have a negative impact on PETG printing, I adjusted the auto PID tune aswell as the default PID values.
Also adding a precompiled hex file of all the previous changes.
After getting my extruder to work reliably on a Vref of 1.100V on the TMC2208, I had to adjust my e-steps quite a bit from the original value from Anycubic. Assuming you have a TMC2208 on a similar voltage, this might work well right after flashing, calibrating your e-steps is recommended in any case.
Enable PIDTEMPBED and add several tweaks
• Enabling heatbed PID tuning
• Tweaking default hotend PID
• Enhancing MMBL grid from 9 points to 25 (3x3 to 5x5 -
fair warning, leveling might take a few minutes now!)
• Increasing buffer and lowering baudrate to ensure smoother prints via USB
• Removing some redundant stuff to save memory
Thanks to @NetrunnerAT for his recommendations!
Co-Authored-By: NetrunnerAT <netrunnerat@users.noreply.github.com>
Using TMC2208 in standalone mode, I've inverted the stepper direction to match Anycubics pin layout. M110 memory watcher was removed due to redundancy and - ironically - to save memory.
David Ramiro