I am building a delta printer and I new at these kind of stuff.My stepper motor does not hold the effector at the park position and falls and touches the bed when I turn off the printer.Can anyone suggest me a solution.
That’s pretty normal for a delta based printer. I generally hold the (cold) extruder when I shut the printer off and set it gently on the bed
@Zeno_Le_Hericy_Z-Inv thanks .Then when I again start the printer I just need to do the homing process first right?
When I assembled my delta, the instructions specifically called out to adjust the eccentric nuts on the v-wheels (they run in openbuilds style v-slot extrusions) so that this wouldn’t happen: just enough friction to hold the effector in place with the motors off. Depending on what you’re using for rails and shuttles, this may be an option, or not.
And yes, your printer will need to be re-homed before every print regardless of this issue or not.
With a 3d printer it’s Always a good idea to re home every print. No need to re level, but a g28 home all axes is a good option to put in the start gcode. It’s far too easy to bump something when the motors are off and the printer has no way to know if anything has moved