Z home position and stepper full step.

On my recently acquired Geetech Prusa I3 I make sure to choose the layer height to correspond to an integer number of full steps but to ensure the Z position corresponds to a full step, the home position must too.
I see the Z axis uses 1/16 step.
Therefore, how is the Z home position determined by the firmware ? Once it detects the end-stop trigger, does it take this as the "zero" or does it adjust to a full step ? The error would be negligible.

Edited 1 time(s). Last edit at 03/17/2016 02:57PM by MKSA.

It will note the location that the endstop triggered. And this will not be a full step typically. This will be at some micro-step.

Quote
Roxy
It will note the location that the endstop triggered. And this will not be a full step typically. This will be at some micro-step.

Thanks. What I suspected.

If I set the jumper ont the stepper controller to work only full steps and change accordingly the step per mm in the EEPROM, will it be OK ? No potential issue (acceleration, deceleration ....) ?
Or is there a provision in the firmware to "round" to the next full step. Holding torque is max at a full step and when unpowered and when the power is tunred on, normally the stepper tries to move to a full step position.

For sure you lose resolution. I don't know what happens with the Sli3r's. I know Slic3r moves the Z-Axis in partial steps when it is doing support material. But Marlin will work.

I think you are worrying too much about partial steps. Everybody uses the micro-stepping and it seems to work OK.

Edited 1 time(s). Last edit at 03/18/2016 02:30PM by Roxy.

Quote
Roxy
For sure you lose resolution. I don't know what happens with the Sli3r's. I know Slic3r moves the Z-Axis in partial steps when it is doing support material. But Marlin will work.

I think you are worrying too much about partial steps. Everybody uses the micro-stepping and it seems to work OK.

I don't worry, just that I don't like the idea of holding a position not corresponding to a full step. Although, now I modified my Prusa Zto run on just one motor.
I don't think resolution is an issue, no point having resolution in the micron range here. Just blowing at the printer, the frame will bent more than a micron
Thank for your time and for using the proper term, resolution and not accuracy