Speeds an resolution

[CaptainVee]

Hi Folks,

It seems that my router can work at much greater speeds than my current computer can keep up with. My latency test was over 90000.

It seems that I can get the speeds up by tinkering with the driver resolution and half stepping, is that correct? Micro stepping is currently at 16.

Is finding the optimum speed and precision just a question of playing around with everything or is there a method I should follow?

I presume that the machine's precision goes down if the speed goes up?

[Zig]

If your PC shows a latency figure of over 90000... sell the anchor and use the PC.

No seriously with such high latency you will get the pc to run with EMC2 but the operation will become uncoordinated if you try to push the speed high.

The microstepping will improve notional resolution of themachine axis but there is no speed gain in microstepping.

If you read up on latency requirement for EMC2 you will note that the lower the latency the better behaved the machine will be.

In a nutshell find another PC with latency figure below 25000 for semi decent performanceor below 15000 for decent performance.

If you want higher resolution dont go for microstepping, get a zero backlash gearbox ( may be even a timing belt kind of a thing) and achieve higher resolution that way. Mind that you will loose in speed through the gearbox.

90000 for a latency figure is unacceptable generally speaking.

I had a machine that would test for latency as about 17000 and every now and then would go far worse than that. It would cause the machine to loose coordination and snap the very fine end mills i am using ( 0.4mm ) without noticeably marking the job it was doing.

My 18000 latency PC allows me to run my machine with servos at a rate of about 50 000 pulses per second and a resolution of 5 micron.

[CaptainVee]

Thanks, that is good info!