stepConf and actual running precision issue

Lets go back,
1.>>>What type of drives? < regarding this, can you please set the timing values at 15.000, 15.000, 20.000,20.000
2.>>>Set the base thread to 100.000
3.>>>You MUST know the drive micro stepping, no guessing there, so in case you can not find them you can follow this procedure, but only after the step No.1
---Set the micro stepping to 1 for all axis, leave the rest as you have it now, do a "test axis" and set velocity to 5 and accel to 30, at the "-+" choose "+" and set the movement to 50mm. Measure how much it moves? from that you can figure out the drive micro stepping as follows:
......if it moves 50mm you are good to move on
......if it moves 25mm you have 1/2 micro stepping so you need to set 2 at the drive micro stepping field in stepconf
......if it moves 12.5mm you have 1/4 so set it at 4..............and so on.
4.>>> Only when you get this right, you can move on to set the speeds and accelerations.
try this and report back.
thank you.

Also when you get your scale figured out run a stepper test on each axis as shown in the manual to make sure you have not exceeded the maximum acceleration or something which may cause lost steps. Do your scale measurements at a slow speed.

JT

What Mod rack are you using? If it is Mod 1 or the imperial equivalent I could plug your values into a spreadsheet I have and give you your scale. If it is the same as I use (Mod1, 30T pinion) give me you pinion teeth, micro step value, any reduction your are using (2:1. 3:1, 4:1) etc and I'll see what it comes up with.

For example, as above, I use Mod 1 rack, 30T pinion, 8 micro step and 4:1 belt drive. My scale is 1724.81516993457

Let me know.

I will test your recommendations on Sat.

thanks Tommy

Hi Tommy,
for the same settings in StepConf and hardware.

One motor runs exactly the same, while the other is running way too much.

not sure if that helps?

that means, with the 50mm test, I have one motor (U axis) running exactly that.
while the other (X axis) runs more than that.

but they both have the same settings on stepConf and hardware driver side.

Hi John,
I did check too. previously i was going at 28,000mm/min on both my X and U axis.
now I just travel at 3,000mm/min for testing.

both steps are at 2000/rev.