Huanyang VFD and Mesa 7i76e stuck at 6000 rpm

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21 Jul 2020 10:40 - 21 Jul 2020 10:40 #175326 by Stran_ge
I edited the Spindle part of my hal as following:
loadrt timedelay count=1
loadrt lincurve personality=4
addf timedelay.0 servo-thread
addf lincurve.0 servo-thread
setp timedelay.0.on-delay 4
setp timedelay.0.off-delay 0


#*******************
#  SPINDLE
#*******************

setp   pid.s.Pgain     [SPINDLE_0]P
setp   pid.s.Igain     [SPINDLE_0]I
setp   pid.s.Dgain     [SPINDLE_0]D
setp   pid.s.bias      [SPINDLE_0]BIAS
setp   pid.s.FF0       [SPINDLE_0]FF0
setp   pid.s.FF1       [SPINDLE_0]FF1
setp   pid.s.FF2       [SPINDLE_0]FF2
setp   pid.s.deadband  [SPINDLE_0]DEADBAND
setp   pid.s.maxoutput [SPINDLE_0]MAX_OUTPUT
setp   pid.s.error-previous-target true

# ---auto rpm: 1-6000 = 6000 / 24000 max
setp lincurve.0.x-val-00 0
setp lincurve.0.y-val-00 0
setp lincurve.0.x-val-01 1
setp lincurve.0.y-val-01 6000
setp lincurve.0.x-val-02 6000
setp lincurve.0.y-val-02 6000
setp lincurve.0.x-val-03 24000
setp lincurve.0.y-val-03 24000

net spindle-index-enable  <=> pid.s.index-enable
net spindle-enable        =>  pid.s.enable
net spindle-vel-cmd-rpm-abs     => pid.s.command
net spindle-vel-fb-rpm-abs      => pid.s.feedback
net spindle-output        <=  pid.s.output

# ---digital potentionmeter output signals/setup---

setp   hm2_7i76e.0.7i76.0.0.spinout-minlim    [SPINDLE_0]OUTPUT_MIN_LIMIT
setp   hm2_7i76e.0.7i76.0.0.spinout-maxlim    [SPINDLE_0]OUTPUT_MAX_LIMIT
setp   hm2_7i76e.0.7i76.0.0.spinout-scalemax  [SPINDLE_0]OUTPUT_SCALE

net spindle-output      => hm2_7i76e.0.7i76.0.0.spinout
net spindle-enable      => hm2_7i76e.0.7i76.0.0.spinena
net spindle-ccw         => hm2_7i76e.0.7i76.0.0.spindir

# ---setup spindle control signals---

net spindle-vel-cmd-rps        <=  spindle.0.speed-out-rps
net spindle-vel-cmd-rps-abs    <=  spindle.0.speed-out-rps-abs
net spindle-vel-cmd-rpm        <=  spindle.0.speed-out
net spindle-pre		       <=  spindle.0.speed-out-abs		lincurve.0.in
net spindle-vel-cmd-rpm-abs    <=  lincurve.0.out
net spindle-enable             <=  spindle.0.on
net spindle-cw                 <=  spindle.0.forward
net spindle-ccw                <=  spindle.0.reverse
net spindle-brake              <=  spindle.0.brake
net spindle-revs               =>  spindle.0.revs
net spindle-at-speed           =>  spindle.0.at-speed			timedelay.0.out
net spindle-vel-fb-rps         =>  spindle.0.speed-in
net spindle-index-enable      <=>  spindle.0.index-enable

# ---Setup spindle at speed signals---

#sets spindle-at-speed true

When i start my spindle it starts at 9xxx rpm instead of 6000 when i type M3 S24000 i only reach 22xxx rpm and for everything else the values are higher than what i typed in.


This is the Spindle part of my Ini:
[SPINDLE_0]
P = 0.0
I = 0.0
D = 0.0
FF0 = 1.0
FF1 = 0.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 24000.0		
OUTPUT_SCALE = 26000
OUTPUT_MIN_LIMIT = 0
OUTPUT_MAX_LIMIT = 24000


I will attach the full hal and ini aswell.

File Attachment:

File Name: configv5_2...7-21.hal
File Size:13 KB

File Attachment:

File Name: configv5_2...7-21.ini
File Size:5 KB
Attachments:
Last edit: 21 Jul 2020 10:40 by Stran_ge.

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21 Jul 2020 13:43 - 21 Jul 2020 14:35 #175334 by Stran_ge
I cant be doing everything wrong here :( , is everyone else controlling their vfd via modbus ??
Last edit: 21 Jul 2020 14:35 by Stran_ge.

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21 Jul 2020 14:52 #175338 by PCW
It sounds like the drive runs at 6000 RPM for 0V input
if so the lincurve values are wrong since you want a
Y value (output) of 0 at a commanded RPM of 6000

Also if you have a output scale of 26000 and a maxoutput of 24000
you can never get full output (these should both be left at 24000)

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21 Jul 2020 15:12 - 21 Jul 2020 15:12 #175340 by Stran_ge
the thing is at m3 s1 where it shouldnt be turning i measure 0.03v and get perfect 6000 rpm
at m3 s6000 i get 2.3 v and 10300 rpm and at m3 s7000 i get 2.7 volt and 11000 rpm

i already changed that output scale back to 24000 but it didnt change anything
Last edit: 21 Jul 2020 15:12 by Stran_ge.

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21 Jul 2020 15:19 #175341 by PCW
Right, so your linscale values are wrong,
Y should be 0 when X is 6000, you have that backwards

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21 Jul 2020 15:26 #175343 by Stran_ge
so it should be this way:

# ---auto rpm: 1-6000 = 6000 / 24000 max
setp lincurve.0.x-val-00 0
setp lincurve.0.y-val-00 0
setp lincurve.0.x-val-01 6000
setp lincurve.0.y-val-01 0
setp lincurve.0.x-val-02 6000
setp lincurve.0.y-val-02 6000
setp lincurve.0.x-val-03 24000
setp lincurve.0.y-val-03 24000

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21 Jul 2020 15:31 - 21 Jul 2020 15:32 #175344 by PCW
Point 02 is wrong and will cause you to get about 2.5V with a 6000 RPM command instead of 0V

Do you get 24000 RPM at 10V?
Last edit: 21 Jul 2020 15:32 by PCW.

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21 Jul 2020 15:34 - 21 Jul 2020 15:38 #175345 by Stran_ge
the maximum is 23xxx rpm at 9.1 volt
Last edit: 21 Jul 2020 15:38 by Stran_ge.

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21 Jul 2020 15:40 #175346 by PCW
So you really only need 3 points for lincurve (you could actually do the same thing with the scale component since you are just offsetting the analog output by 6000 )

setp lincurve.0.x-val-00 0
setp lincurve.0.y-val-00 0
setp lincurve.0.x-val-01 6000
setp lincurve.0.y-val-01 0
setp lincurve.0.x-val-02 24000
setp lincurve.0.y-val-02 24000
The following user(s) said Thank You: Stran_ge

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21 Jul 2020 15:48 - 21 Jul 2020 15:51 #175347 by Stran_ge
i changed the hal part and now when i start the spindle it starts at 6000 but i cant change the speed anymore.

I can start stop and change direction nothing else.

The Output voltage stays the same whatever i input via m3 sxxxxx


i appreciate the help so far, im trying to get this working correctly for the past 2 days
Last edit: 21 Jul 2020 15:51 by Stran_ge.

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