How jitter affects the no of steps or speed of the stepper motor

I am working with Mesa board with 3 stepper motor. I am trying to reduce the jitter and so want to understand if there is direct relationship between jitter and the speed of stepper motors especially when 3 motors are connected.

As I understand when we are not using parallel port, then base thread doesn't come into picture and so only servo thread jitter needs to be seen.

If so, then would like to understand how will I know what max steps can we have for stepper motor have per sec running based on jitter? Is there any direct calculation exists? I am sure it will differ when 3 motors are connected and when 1 motor is connected.. 

Please help understanding these calculations

Mesa boards will not limit the step rate, they can be pushed to do 4 or 5 MHz rates, 1 MHZ is normal for them, and it does not matter how many drives/motors.
Drives will be more of a limiting factor when used with Mesa as they might not work with such short timings.
Most drives, cheaper ones, will not work with timings under 5000ns for step time and space, some will work with 200ns but those cost a lot.
Not an arduino, so no arduino limits with the number of stepgens.
Also, Linuxcnc uses PID loops for stepgens with Mesa boards, so that reduces even further the influence of jitter on step generation.

vkhargwanshi wrote:

I am working with Mesa board with 3 stepper motor. I am trying to reduce the jitter and so want to understand if there is direct relationship between jitter and the speed of stepper motors especially when 3 motors are connected.

No, there is no relation between host jitter (or number of steppers) and step rates when you are using Mesa hardware. Therefore also no such calculations.

Thank you for the reply.. Ok so how should I decide upto what extend I have to optimize jitter to ensure smooth working of my 3 axis machine..

Just till it does not bite, the watchdog that is.
Mesa will work with quite bad jitter, i have some laptops for testing with very bad latency and some do drop the link sometimes but still work ok for testing.
Some work for days without ever droping the link, one through a USB to LAN adapter.
To put it simply, install LinuxCNC, wire the Mesa card, make a simple config, start LinuxCNC and leave it running, watch youtube, copy stuff around, load some other gcode, etc and see if it drops the link.
If not, use it.
It is as simple as that.
LinuxCNC is very good at letting you know when something is wrong.

Thank you tommylight.

I am doing some trial and errors, I am using Mesa 7i96s. I observed with one motor if I keep the speed as 5000mm/min with 200 microsec jitter, 32 micro stepping and 200 steps, I keep getting errors from LinuxCNC within mins, but when make it 2000mm/min, don't get any error, even when running for an hr...

So you mean to say, I need to have such trial and errors to understand what will be the best speed I need and so keep lowering the jitter by removing services.. Right?