Need Help! with my milling machine

Hi,

thanks for the fast response, i reversed the polarity on the encoder card to ged rid of the negative values but it didn't work, my problem is still how can i get rid of these oscillating?

how big should the P value be in my case?

On your picture, what is the oscillation from top to bottom of the oscillation?
If it is about 0.005mm is hard to go better than that due to your encoder limitation. If you make your calculation after quadrature one encoder count (your maximal physical measurement) will be about 0.001, because you will have 5000 pulses per 5mm. And it is normal that the motor will be oscillating at least about a few encoder positions.
What you can improve however is the medium value of the error (so that it will be around 0 when you move the machine to one side and to another). This is acheived by changing the FF values (FF1 if I am not mistaken) with small values.

I hope that I gave some help.

Thx for the answers super forum members , i will tune all axis now with belts on and post the results.

after a few test runs and sample parts i still have a new big problem, the surface finish isn't good enough i think it probably comes from the PID settings
here a few pics from the milled surface.

I've tried to tune the Axis more accurately but after hours and hours the result was still the same all changes made it worse then it was.
so now i need your help guys again... sry for that but might one of you can help me.

Milled surface:

And here the Pics from Halscope and my settings (click to enlarge)

Rapid Move 60mm:

With Feed 4000mm/min:

Without movement:

Program:
(the part of the program that finished the outer diameter)

[quoteLooking back through old messages it looks like this is the Chiron machine? That certainly ought to be able to achieve a good surface finish, and it is unlikely that the moving parts are light enough for chatter to be a problem.][/quote]

Yea i think so too i will try your proposal about the half Pgain and make another test part.

u think my I value is to high? cause its such a huge number.

My small opinion:

Run the code with the spindle in a high position with the spindle off and place you hand in the table. Feel the table.
If you can feel it jerky you will know that is not from the machine spindle or cutting conditions.
Then proceed depending on this test.

Hey guys,

finally i have time to get further with my retrofit but still have a few questions

the PID Axis settings are done the only thing left is the Spindle.

1. The problem is that the Mesa card didn't send 10 volts the the servo amplifier when i set the Rpm
in MDI to 7100rpm wich is the maximum spindle speed the motor can handle, i get only 8,76 Volts instead of 10V so the spindle doesn't run at full Rpm.
I mesured with my Laser Rpm tester and ill get only 6900 Rpm thats ok because the amplifier gets the 8,76V but why is the voltage not 10V??

What i tried so far:

external power for the opto card wich is a 7i37TA but still no 10Vlot

i think my hal file is the problem maby u guys find the problem


2. The second problem is when i shut down the Pc but have the machine Power still on all Outputs getting true signal spindle brake also, and thats really bad the Z-Axis runs down then.
How can i avoid that??

hope u can help me.

sry for my bad english

greetings nooob