F1410HS CNC Project with Acorn

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LorenzoRR
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Re: F1410HS CNC Project with Acorn

Post by LorenzoRR »

Just checked that my multimeter is crap and provides non-constant shitty values... need to buy another one.
Will repeat the measurements.
Lorenzo
Prototyping with: EMCO CT60, Klipfeld K120 and Wabeco F1210HS
HFS Suspension


martyscncgarage
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Re: F1410HS CNC Project with Acorn

Post by martyscncgarage »

LorenzoRR wrote: Thu May 21, 2020 7:27 am Just checked that my multimeter is crap and provides non-constant shitty values... need to buy another one.
Will repeat the measurements.
That's the one thing I don't cheap out on. I buy Fluke
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ


LorenzoRR
Posts: 77
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Re: F1410HS CNC Project with Acorn

Post by LorenzoRR »

martyscncgarage wrote: Thu May 21, 2020 9:31 am
LorenzoRR wrote: Thu May 21, 2020 7:27 am Just checked that my multimeter is crap and provides non-constant shitty values... need to buy another one.
Will repeat the measurements.
That's the one thing I don't cheap out on. I buy Fluke
Just ordered a Fluke by Amazon :x
Arrives tomorrow.
Lorenzo
Prototyping with: EMCO CT60, Klipfeld K120 and Wabeco F1210HS
HFS Suspension


LorenzoRR
Posts: 77
Joined: Sat Apr 11, 2020 5:28 am
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Re: F1410HS CNC Project with Acorn

Post by LorenzoRR »

I have updated the measurements:

1) Voltage in pins CW, CCW and FQ (error acknowledgement -Reset-):
2020-05-22_Voltage-measurements.jpg
Seems that pin CW, CCW and FQ have 24 volts when:

- Spindle runs CW = Knob selector in FWD
- Spindle runs CCW = Knob selector in REV
- Reset after e-stop = Knob selector in "0"

respectively.

2) Signal 0-10 V is not linear. I have charted voltage readings every 10% of potentiometer %:
2020-05-22_0-10V-non-linear.jpg

Thanks!
Lorenzo
Prototyping with: EMCO CT60, Klipfeld K120 and Wabeco F1210HS
HFS Suspension


martyscncgarage
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Location: Mesa, AZ

Re: F1410HS CNC Project with Acorn

Post by martyscncgarage »

LorenzoRR wrote: Fri May 22, 2020 5:58 pm I have updated the measurements:

1) Voltage in pins CW, CCW and FQ (error acknowledgement -Reset-):
2020-05-22_Voltage-measurements.jpg

Seems that pin CW, CCW and FQ have 24 volts when:

- Spindle runs CW = Knob selector in FWD
- Spindle runs CCW = Knob selector in REV
- Reset after e-stop = Knob selector in "0"

respectively.

2) Signal 0-10 V is not linear. I have charted voltage readings every 10% of potentiometer %:
2020-05-22_0-10V-non-linear.jpg


Thanks!
I would agree. Please rerun the speed test and measure the voltage between pins 4 & 5
Do you have a way of tracking the RPM from zero speed to high speed, so we can see the voltages at X RPM?
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ


LorenzoRR
Posts: 77
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Re: F1410HS CNC Project with Acorn

Post by LorenzoRR »

Will use the inductive tachometer I have in my lathe. I think it will work.

Lorenzo
Lorenzo
Prototyping with: EMCO CT60, Klipfeld K120 and Wabeco F1210HS
HFS Suspension


cncsnw
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Re: F1410HS CNC Project with Acorn

Post by cncsnw »

What is the relation between commanded RPM (commanded percent speed) and measured analog voltage, if you disconnect the analog wires from the VFD?

If that is linear and on track, but you get distorted results when connected to the VFD, then try adding a 0.1uF capacitor across the analog output, or perhaps this circuit with two capacitors and a resistor:
AnalogSnubber.png


LorenzoRR
Posts: 77
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Re: F1410HS CNC Project with Acorn

Post by LorenzoRR »

Hi,

I was measuring with a low impedance multimeter and it was affecting the measurement itself.

With a normal one, response is perfectly linear, starting from 100 rpm, 0 VDC to 8000 10 VDC.

Also double checked selector voltage w.r.t. CW/CCW/FQ pins and previous conclusions were correct. Final report below:
2020-05-26_Voltage-measurements.jpg
RPMs are accurate as managed to fit lathe's inductive sensor:
2020-06-26_Induct-RPM-1.jpg
2020-06-26_Induct-RPM-2.jpg
2020-06-26_Meas.jpg
Do you think I still need signal isolator? if Centroid's H8 is stable I would not see the need?

Ready to start bench test I think !

Thanks

Lorenzo
Lorenzo
Prototyping with: EMCO CT60, Klipfeld K120 and Wabeco F1210HS
HFS Suspension


martyscncgarage
Community Expert
Posts: 9953
Joined: Tue Mar 28, 2017 12:01 pm
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Location: Mesa, AZ

Re: F1410HS CNC Project with Acorn

Post by martyscncgarage »

If it's a true VFD (3 wires feeding the motor?)
Then perhaps you do not need the signal isolator.

Use an output for SpinFwd and an output for SpinRev
Use the generic VFD schematic in the Acorn schematic package. DO make sure you use the relay board
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ


LorenzoRR
Posts: 77
Joined: Sat Apr 11, 2020 5:28 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: F1410HS CNC Project with Acorn

Post by LorenzoRR »

martyscncgarage wrote: Tue May 26, 2020 3:05 pm If it's a true VFD (3 wires feeding the motor?)
Then perhaps you do not need the signal isolator.

Use an output for SpinFwd and an output for SpinRev
Use the generic VFD schematic in the Acorn schematic package. DO make sure you use the relay board
Yes, it is 3-phase 220V, confirmed by supplier.
I will study that layout.
Thanks.
Lorenzo
Lorenzo
Prototyping with: EMCO CT60, Klipfeld K120 and Wabeco F1210HS
HFS Suspension


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