Hi zacbot, thanks,. well, I have done what I said in the last post:
"I have perfectly calibrated steps/mm and smooth rod radius. So I get the printer to accurately go to 0.1mm over the surface near each of the three towers and in the center of the build plate." Which is what I understand for calibrating the printer,
To make it clearer I have done this:
Of all these, the only thing strange is that to get the same height in the center I had to use a smooth rod offset value around 114 instead of the recommended 111, maybe that's a clue...
This is a bit more than what is explained in the video. I understand that doing this should already give accurate height and planarity, but it isnt happening. By the way, Im using Marlin latest official version but with the changes richrap did for the 3dr.
"I have perfectly calibrated steps/mm and smooth rod radius. So I get the printer to accurately go to 0.1mm over the surface near each of the three towers and in the center of the build plate." Which is what I understand for calibrating the printer,
To make it clearer I have done this:
- Measured diagonal rod lengths and used that value in the firmware.
- Adjusted steps/mm for each of the three carriages with the digital caliper.
- Adjusted endstops to get accurate height near the base of each tower with a 0.1mm thickness gauge.
- adjusted smooth rod offset to also get accurate height in the center of the build plate
- repeated the two previous steps until accurate height was achieved near the base of each tower and in the center also
Of all these, the only thing strange is that to get the same height in the center I had to use a smooth rod offset value around 114 instead of the recommended 111, maybe that's a clue...
This is a bit more than what is explained in the video. I understand that doing this should already give accurate height and planarity, but it isnt happening. By the way, Im using Marlin latest official version but with the changes richrap did for the 3dr.