My builds has been in “progress” for the last year, and recently refocused my efforts to advance and complete this project. I figured starting my own build thread would help drive some accountability among other benefits.
I am currently awaiting my TMC2209 drivers to arrive and then I should be close to making it move.
After completing a number of drawing test patterns I decided I felt comfortable enough to advance to cutting. I would consider this test piece both a failure and a success. I am happy with the floor and wall finishes, but then size of the piece and material caused thin wall blow outs.
So I have a learned a few things about my machine over the last couple days but leaves me with a few questions now.
It turns out that I purchased a 1 Start Lead Screw for the Z axis (instead of 4 start) which has caused me to set steps per unit at 1600 to be accurate. I’ve attempted to adjust my code and boot load the bin file again, but it didn’t take.
I adjusted here on line 1167.
After bootloading from SD, M502 displayed M92 Z as 400 still. I adjusted to 1600 with M92 command, and then used the TFT35 to save to Eeprom. I think I should be good now as it remained at 1600 after a reboot of the machine.
Now for the questions:
Why didn’t 1600 take from bootload? Does the TFT have priority or should have I have adjust in more areas than just line 1167 of the code?
What are the trade offs between 1 start and 4 start. Would it be recommended to change to a 4 start?
It appears the SKR board will operate fine without the SD left in, I was under the impression I should leave in. Can someone clarify?