If the endstops kick in, then st_get_position_mm shows the actual travel distance. current_position[Z-AXIS] does not get updated correctly thus we cannot use it when unhomed.
current_position[Z-AXIS] is later set to Z_MAX_POS,
we cannot use that either to calculate the travel distance
Removed the "plan" parameter.
We were incorrectly returning from the function if the printer was homed,
but plan = false. This would leave current_position with an incorrect value
If the printer is homed => finish the move and return the travel distance
If the printer is not homed => rely on end stop to prevent damage,
return travel distance even if the endstop stopped the move.
The current unload sequence does not give good results.
The Marlin 2 sequence looks good on my end. This can be later
used to improve M600
Added all the constants from Marlin 2
* Created a new function raise_z() which will move the Z axis by some
X millimeters. If plan = false, the function will return the
actual travel distance since the move is blocking.
* raise_z_above() is refactored to call raise_z()
Now the M701 and M702 will move the Z-axis relatively, and also
when done, revert the Z axis position when done.
This is a similar behavior as in Marlin 2.
It is only used when the MMU is disabled. With the MMU we use a defined ramming sequence.
When the MMU is disabled I borrowed the usages from Marlin 2.
The L parameter only defines the length for the "fast" load length.
Default value is 70mm, same as M600
- remove virtual methods (we only have one fsensor implementation at a time)
- comment out some of the debugging texts
- remove volatile and replace them with proper synchronized access to relevant variables
Don't start moving the E-motor immediately
Instead of starting the E-motor move when the load to extruder starts,
we can start when we are loading to the fsensor. At that stage
the MMU has changed from a fast load to a slow load.
Because it looks like the communication drop outs are caused by some electrical issues and we can loose even a byte from the version response, which is deadly for future operation.
D.R.racer
Guðni Már Gilbert
Alex Voinea