Backlash control in V3

ytliu

The DIR change timing issue has been resolved.
I will redesign the backlash feature recently.

ytliu

Ver: 2019-05-21-110 Description:
1. Add the Ext-key function definition(#446,#447) configuration item: Disable(4), to turn off the Ext-key response;
2. Improve function backlash, all motion mode have increased the backlash;
3. Improve the coordinate display when the backlash is enabled， to ensure that the coordinate display match the actual position;
Note: To ensure that the backlash is always performed correctly, the following configuration is strongly recommended:
#113=1 "Arc interpolation algorithm selection"="Soft algorithm"
#448=0 "MPG control mode"="Open"
#114=0 "Jog support in continuous mode"="Mode 1"

ytliu

slib.nc in the firmware supports fixing drilling cycles on axis A (G73, G81, G82, G83).

ytliu

This new feature is supported on all DDCS.

When #448=0,Open the MPG control Mode,means the MPG will work in precise mode.In precise mode,the MPG will send out each pulse which the handwhleel has gernerated;
When #448=1,close the precise mode,when the user stop turnning the handwheel of the MPG,the MPG just stop sending pulses.