Hi Snapmakers,
when I connect via Luban or when I navigate to the Jog section of the touchscreen, the printer always demands homing. I personally think that this is not necessary. Admitted, the printer will not know it’s absolute position, but nothing could really go wrong - the end switches will avoid any desasters. On the other hand, I I plan tasks that don’t require knowledge of absolute position (e.g. unload filament, PID tune, Firmware update etc.), the homing just costs time. And before printing, homing is done anyhow.
Still, it’s really a minor thing - homing is not that time consuming…
Cheers!
Hauke
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Hey, i can´t understand your whole post but, if you turn on your machine, it doesn´t know where it stands.
If you go to jog mode and have to home, it would be damage prevented.- Same at Luban connection.
If you could jog without homing after turning on (without knowing the machine position) you could badly crash every axis in the other direction of the endstops. Endstops are mounted in only one direction.
For example, crash the tool-head into the build plate.
If you use a other slicer than Luban, you could create your own start/end-gcode, so you could skip the homing command, if you want to save 5sec.
Hope this helps!
Hi @xchrisd, are you sure that endstops are only on one side? In that case, I can immediatly follow the argument and would withdraw my request. But usually printers have endstops on both ends…
Do you hear it clicking if you drive the bed or other axis to the opposite side of homing position?
I am pretty sure about 
Well, hearing a small click above the noise of the PSU is difficult 
But I remember that there are videos on dismanteling the linaer modules… will look for one and see if an end switch is on both sides…
I shifted the axis by hand.- no click
This video: https://www.youtube.com/watch?v=2gg3Fd4_8RM&feature=youtu.be suggests indeed that there is no second end switch on the motor end, unless there’s a hall sensor (which would not click) . Weird, since it would have been rather easy to integrate one into the PCB… I had thought the other side is the difficult one…
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