NEMA 23, weird velocity results.. need help

Attached is the driver in terminal, seems to run nvidia gt218. How do I change this?

Thanks

Attached is the driver in terminal, seems to run nvidia gt218

Not sure where you got that number from, it clearly says
Kernel driver in use: nouveau
Kernel modules: nvidiafb, nouveau

Those are open source drivers, nouveau is right one for nvidia

It might work better with the 3D driver, this covers how
help.ubuntu.com/community/BinaryDriverHowto/Nvidia
but don't do anything until you know video is the problem.

You need to do the terminal latency test and see where the high figures are coming from.

It appears that you have the Intel 82801I ICH9 chipset.
There are no listings for this chipset having the SMI problem, if it is regularly spiking with no activity, the problem is likely to be something in BIOS, like fan control.

See this addition to the FAQ with a similar one I had
www.linuxcnc.org/index.php/english/forum...ency-solutions#36807

regards

I did a boot to win7 x86 with default microsoft nvidia drivers and got around to 22600 pulse jitters.
Will take screenshot and check back here how to reduce the jitters in linuxCnC.

The MACH 3 shows that lower value after auto running pulse setting.
On MACH 3, the values for my motor is at vel 400mm/s & accel 80mm/s2.

The motor indeed did move much faster on my travel.
Scale is same.
Using 2 uStep, 200 steps/rev, pulley 1:1, 1.75mm/rev.

Hoping to resolve the differences in linuxCnC to get almost same speed.
I did a test to run 1000mm/s & 76.875mm/s2.
The motor ran for 2secs before stalling.
Awesomely fast, but not really manageable.

Hence I down it to 400mm/s which does stall after running for 30mins.
Temp wise is still touchable.
DIP settings to 4.20A on the driver board.
Voltage is measured around 8~13 max per motor.

Thanks

I saw the forum link you link me to, so I need to go off to my BIOS and off

1. CPU Fan (monitor & control)
2. PSU management
3. Hyper threading

Is that right?

No pre-conditions ya? As in if fan control is off, the cpu wont overheat?
So no need to be in a/c room.

No pre-conditions ya? As in if fan control is off, the cpu wont overheat?

You don't turn the fan off, you turn the temperature sensing fan control off.
In other words you set the fan to be on full at all times, so that there is no need to test the temperature and adjust it, that is what causes some spikes.

Really good point that you mentioned.

Yes MACH3 is at 25kHz.

So to say, I will really need to up either my leadscrew or my motor to get that IPM higher.

By the way, when you asked the base period, you meant the base max when we run the jitter tests?
If that is the one, then linuxCnC is giving me 33858, while MACH3 is 22600.

At first test, MACH3 says pulse too fast, auto step-in and take over for adjustment to 22600.

For linuxCnC the base max jitters of 33858 says 22kHz ish.
Step time 3050
Step hold 0
DIR hold 35000
DIR setup 35000.

For MACH3
Step time 3uS
Step hold 0
DIR hold auto (will find out and insert here)
DIR setup auto (will find out and insert here)


Andy mentioned at 228steps/mm and 10kHz, I can get theoretical 40mm/s.
May I ask where or how can I edit this 10kHz? Or you mentioned 50knS.
Is that the same max base jitter that I have for 33858?
So change that to 5000?

This confuses me...

Also I do notice that at 33858 and above settings, I get stall when I hit

12.5mm/s @ 20mm/s2 around (3000mHz)...
This is when unloaded, jz the motor attached to housing and frame. No screws yet or couplings.

Thanks

I cant change ini or hal files. Everytime I do that, the stepconf for stepper throws it all away...

I do hear that too many uStep will actually hurt the torque?
Hmmm, still in figuring out mode...

Let me try again later or early tomorrow and screenshot both mach3 and linuxCnC and find out what differences they are making to help improve.

Thanks for all the headsup

Really appreciate it