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A high resolution encoder allows better velocity feedback
so you don't get "crunchy" feedback/motion at low speeds.

This is especially important with absolute encoders as you do
not get time stamps of count events like you can with normal
quadrature encoders.

Returning the encoder count to LinuxCNC if the drive has local
feedback is mainly useful if the feedback is from linear scales. 

Gents,

have a question on those famous cheapish AC servos form Aliexpress. Most of them are 17-bit absolute encoders. Correct me if i'm worng - this means it has 17-bit resolution per revolution? 1 / 131072. What for? is there any advantage of having such a big resolution per rev? i can imagine belt drive involed in drive - the slightest tension change in the belt under load will lead to position vs command discrepancy and force the motor to react. I think it will make the system nervous unless you set some parameter like dead band - but then why use such a big resolution?

Have anyone of you used those servos with Mesa cards and used encoder feedback from driver to Mesa?

Bit confused.

What material is the enclosure ?

Spindle model SW100
MAX power(kw) 3.3
MAX current(A) 13.1A
Maximum speed(RPM) 30000 
Maximum frequency(Hz) 1000hz
Nose HSK32E
Lubrication Grease
Weight(kg) 15
Cooling water or oil
Tool change type Pneumatic
Diameter 100mm shipping list
1pcs spindle motor
6pcs hsk32 er20 new chuck
6pcs hsk32 chuck holder 
1pcs solenoid vale
1PCS SPINDLE HOLDER
1PCS 4KW VFD input 220v single phase/ output 380v 3 phase 1000hz
1PCS BRAKING RESISTOR
10m PU tube 8mm
1PCS power conector
1PCS signal conector



www.ebay.com/itm/187284133495 

Hello,
Can the INCREMENTS be dynamic by G20 (in) or G21 (mm)?  

In my .ini / DISPLAY
INCREMENTS = JOG  .010in .001in .0001in
INCREMENTS = JOG  .100mm .010mm .001mm

Thanks