Servo Wiring and Tuning detailed How To example Mesa 7i77.

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19 Aug 2019 10:40 #142483 by rodw
Left = Dislexic right :)
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19 Aug 2019 10:59 #142484 by Type_Zero_Design
Ha! Rod you had me wondering there for a second, I was like darn I didn't even see sliders on the left! No wonder it wasn't working!
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19 Aug 2019 22:29 #142522 by tommylight

Left = Dislexic right :)

lol
was on the phone and at work so could not reply.
Thank you.

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19 Aug 2019 22:31 #142523 by tommylight

Ha! Rod you had me wondering there for a second, I was like darn I didn't even see sliders on the left! No wonder it wasn't working!

Is it working now with no dyslexia ?
:)
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20 Aug 2019 04:59 #142553 by Type_Zero_Design
I got it working and was able to move this at signals actually see what's happening.

I don't see that crazy movements describe seeing in Hal Scope., but what I do see applies sharper the line that off the screen that fat then a second later actress back in the screen in a large arc goes back to normal.

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21 Aug 2019 10:28 #142711 by Type_Zero_Design

I got it working and was able to move this at signals actually see what's happening.

I don't see that crazy movements describe seeing in Hal Scope., but what I do see applies sharper the line that off the screen that fat then a second later actress back in the screen in a large arc goes back to normal.


LMAO I think I was half asleep when I wrote this.

Sorry for that garbled mess..

So what I was trying to say is I was able to get everything situated in Hal Scope and see the signals but when comanding the short jogs as you described I was not seeing the signals jump all over out of control. Instead what I would see is the signal would spike up vertically in a straight line off the screen the about a second later it would drift back in the screen and in line with the other line in a giant sweeping arc.

I did play some "I" and that did make a change and eliminate the giant spike, but then the signal never came back in line and seemed to just chase itself producing a endless sine wave.

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21 Aug 2019 12:00 #142713 by PCW
A couple of suggestions:
1. Don't use any I or D only P and FF1
2. Make sure you remove all the PID maxerror lines in the hal file
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22 Aug 2019 02:39 #142762 by Type_Zero_Design
PCW,

I will check into the maxerror lines.

I should have mentioned that I started with P and some ff1 but I wasn't getting any visible change as I think the error was so large. I got nervous to be making large changes. Is there a safe range to work in or is it all just case by case.

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22 Aug 2019 14:00 #142848 by PCW
If you dont have the maxerror lines removed, you will no be able to tune

You can either calculate FF1 (10/velocity@10V) or scale the analog output
in velocity in which case FF1 = 1.0

An initial P value of 1 is probably OK
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22 Aug 2019 23:06 #142887 by tommylight

If you dont have the maxerror lines removed, you will no be able to tune

You can either calculate FF1 (10/velocity@10V) or scale the analog output
in velocity in which case FF1 = 1.0

An initial P value of 1 is probably OK


Added this info to the original post.
Thank you, PCW.
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