Adjusting distance from bed

NoLiver92

I have just been given a delta printer and I am trying to set up some easy scripts which can be used by anyone to setup the printer.

The process of setting up:

1. Home
2. Calibrate (auto mode)
3. Adjust Z for bed coating
4. more settings....

I am stuck on number 3, it has to be done manually but I want to find the G code command to do it. The printer has options for buildtak, painters tape, kapton tape and pritt stick. I believe it just adds an offset but im not sure.

I use M114 to get the position when at home for the z axis, then I change the surface to buildtak and send M114 again at the home position and theres a 0.4mm diffrence in the 2 readings (thickness of buildtak).

One method I thought of was to go to a known position, say 100.4 and set the axis to 100. BUT if the code is run twice it would add up creating a 0.8mm offset. When it is set up manually, if the build surface offset has already been entered it doesnt modify it again.

How would I change the build surface height in G code?

Repetier

In eeprom there is a parameter for this. Bed coating I think. You can also change it on the printer lcd.

Anyhow enable command logging, open eeprom editor in host/server and change the value. You will see a M206 command appear. That changes the bed coating in eeprom. Remember it (without N and * part) and replace the value with the coating you want. You need to home afterwards to have it change the height.