Fixed bug threading travel limited to 256 synchronization pulses

Due to a bug the threading synchronization counter was limited to 256 synchronization pulses. Depending on the number of synchronization pulses / revolution, the travel was limited
The bug was introduced in release V1.1g3.20211014

Fixed threading start position Z shift when changing RPM

Fixed threading start position Z shift when changing RPM.
This release barely fits in the Arduino Uno memory. To upload to arduino, use board version 1.8.3 and IDE version 1.8.16

Improved Threading synchronization and support for Lichuan A4 servo driver in step/dir mode

Improved Threading synchronization resulting in smoother startup and faster synchronisation
Added support for Lichuan A4 servo driver in step/dir mode
Some minor changes

Enabled the probe function

Enabled the probe function to support the CNCL probe function for drilling and rigid tapping