7i76e to Durapulse connection

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19 Feb 2024 18:42 #293777 by gardenweazel
Yes, I have read about and I have installed a braking resistor that matches specs.

Additionally, I changed the ACC/DEC times from 10 secs to 12 secs.

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19 Feb 2024 19:08 - 19 Feb 2024 19:24 #293779 by gardenweazel
Attached is a zipped XLS copy of my setup sheet saved from Gsoft2, see any other problems?

The only other issue that I may have incorrect is parameter P03:20, P03:28 and P03:31.

The Durapulse manual is very helpful and written much better than offshore manuals but, there's a couple of places
in the manual that are a bit confusing. Especially this sentence regarding the braking resistor:

Set P06.01 to 0.0 to disable the over-voltage stall prevention function (connected with braking unit or braking resistor). Use this setting when braking units or braking resistors are connected to the drive.

The ability to program this VFD via software is priceless!
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Last edit: 19 Feb 2024 19:24 by gardenweazel.

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20 Feb 2024 23:29 #293870 by gardenweazel
@PCW
You need to set DI1 to RUN and DI2 to FWD/REV to work with the 7I76E
I think this is P3.01 = 1


From this list what should I be selecting based on your comment?  

 
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09 Mar 2024 21:56 #295540 by gardenweazel
So, I have everything connected. From the 7i76e and in LinuxCNC I can start the spindle both forward and reverse.

The only problem I have now is that I can't control the speed of the spindle from LinuxCNC. The speed ramps up to my starting speed
and is uncontrollable. Stopping the spindle works just fine as well.

I saw some commentary about LOCAL and REMOTE modes but, I see now way to totally disable the LOCAL mode if that even
is indeed the issue.

Anyone else have or have had similar situations?

 

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10 Mar 2024 18:38 #295595 by Aciera
have you tried using a potentiometers to directly supply the variaible voltage on the analog input? That would give you an indication if the problem is on the mesa side or on the vfd side.
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11 Mar 2024 15:51 #295647 by gardenweazel
I can control the spindle via the keypad if I config the VFD to do so, no problems.

I can start/stop the spindle with my 7i76e however I cannot change the speed from the 7i76e.
The spindle just ramps up to the START FREQ(83.33Hz) and remains as such even when I click on the plus button in Axis.
The LOWER FREQ is also set to 83.33hz as the spindle docs indicate to not run lower than 5000rpm.

The docs are very well written but, I note that there is confusion around the terminology of AUTO, MANUAL, LOCAL, REMOTE and HOA.

I suspect that the 83.33hz somehow plays a role in the following:
[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 = 24000
OUTPUT_MIN_LIMIT = 0
OUTPUT_MAX_LIMIT = 24000






 

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11 Mar 2024 16:58 #295655 by PCW
Replied by PCW on topic 7i76e to Durapulse connection
Have you checked:

1. The voltage between 7I76E SPIN- and SPIN+
2. The voltage between 7I76E SPIN- and SPINOUT (at various spindle speed settings)

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11 Mar 2024 20:58 #295682 by gardenweazel
One PIN 2(spindle output) of the 7i76e, is that supposed to be connected on the VFD with Analog Input or Analog Output?

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11 Mar 2024 21:17 - 11 Mar 2024 21:33 #295683 by PCW
Replied by PCW on topic 7i76e to Durapulse connection
Analog input

The 7I76E SPIN+,SPINOUT,SPIN- connections
connect to the drives potentiometer connection terminals
usually named something like:

VFD      7I76E
+10V-->SPIN+  potentiometer full speed end
AIN --> SPINOUT potentiometer wiper
GND -->SPIN-  potentiometer zero speed end
Last edit: 11 Mar 2024 21:33 by PCW.
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11 Mar 2024 21:33 #295684 by gardenweazel
Yes, I have it wired up as such.

Pin 1 and Pin 3 = +10.61vdc
Pin 1 and Pin 2 = -12 mV  and this value never changes despite the start up at 83.33hz

The -12 mV is millivolts. So a low.

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