Hi
test (open loop) non differential output, max step frequency output, perhaps the noise is coming from my testing probes, picture at 3Mhz this output frequency is way beyond my actual needs. and interesting to know what are the step output card band width
and At 5Mhz this is only for testing proposes my servos bandwidth are way below this output
The maximum step rate will be limited by the step length and step space parameters.
In a working system, these parameters in turn are limited by the drives minimum timing values.
If the clone cards uses that same clock scheme as Mesa cards ( Stepgen base clock= 100 MHz ),
step rates to 10 MHz are possible.
interesting to know what are the step output card band with
Don't worry. In a real machine feed and acceleration are limited by mechanical parameters.
Whereas increase microstepping decreases effects. In other words there is big different for 1/2 and 1/4 and small different for 1/128 and 1/256...
hi,
with Pulse and direction top speed and precision calculus are clear but
But how to calculate the bandwidth on a Ethercat servo drive and precision?
let say leadscrew pitch 0.100inch encoder servo 10000 ppr?
if bus cycle time is 1000000 and refClockSyncCycles=1
how to determine the top speed IPM and minimal resolution in Inches (minimal cut).
hi,
with Pulse and direction top speed and precision calculus are clear but
But how to calculate the bandwidth on a Ethercat servo drive and precision?
let say leadscrew pitch 0.100inch encoder servo 10000 ppr?
if bus cycle time is 1000000 and refClockSyncCycles=1
how to determine the top speed IPM and minimal resolution in Inches (minimal cut).
In amateur machines, none of this matters.
You can count it for hours and buy a Chinese ball screw with a backlash 0.1 mm like me...
hi,
with Pulse and direction top speed and precision calculus are clear but
But how to calculate the bandwidth on a Ethercat servo drive and precision?
let say leadscrew pitch 0.100inch encoder servo 10000 ppr?
if bus cycle time is 1000000 and refClockSyncCycles=1
how to determine the top speed IPM and minimal resolution in Inches (minimal cut).
With ethercat servo drive operating in velocity mode, your main limitation will be the servo's rated/max speed. The resolution limitation will be time based, if I'm correct LinuxCNC EtherCAT will have something like a 2mS feedback latency on a 1mS thread, so this will limit your positioning accuracy during very fast moves. I am not aware that a regular machine tool is capable of reaching this speed limit.
Here is a detailed explanation how it is timed.
