This hobby ends in tears no matter what you trust… Seriously though, if you’re not going to trust tech, you have to throw out the controller, the computer that generated the code, etc.
Why not have the servo run into a fixed stop, rather than rely on its ability to stop itself accurately?
Using the servo means you will always have a z endstop which moves into position with g-codes G28 or/and G29. Remembering to manually fix a probe every time you want to home is risky because, basically, no probe no endstop.
Using the hotend as the probe should work while the hotend is heated. You can heat the hotend until the plastic is soft enough, do the probing, and then bring the hotend up to full temperature. All the steps can be programmed into the start file of the g-code.
@ThantiK any body running their machine remotely better hope they never have a fire.
Failures happen and in a backroom in your house and your away or asleep is asking for trouble.
You are supposed to be a " pro". Yet forget this when extolling the idea of this great idea of full auto printing. Why do printer farms still have somebody watching then?
Also why does nobody seem to have their bed heated up when that is the biggest cause of distortion.
Two approaches I think have merit:
- three endstops mounted somewhere outside the bed itself. Wired so any trigger the stop
- Mount three blocks that stick out above the bed vertically… Mount the switch slightly above the hotend bottom so the switch triggers on the blocks (outside the print area) but doesn’t drag on the print.
-Brook Drumm
Printrbot.com
For those of us with mirror beds: How about a lazer pointer and sensor with a pinhole cover on it?
We are gonna try dual magnets as contacts on an endstop. The endstop will mount in a holster off to the side. The hotend will have 2 receiver magnets on the end of the endstop wires and gcode will go over to the holster, click onto the magnet endstop. To grab it and drop it off, it will slide in/out sideways, and exit/enter from the top. The holster holds it while the hotend slides sideways and leaves it behind. Automated and reliable.
@Brook_Drumm , that sounds like the beginning of a tool changing system.