Acorn to Fuling DZB280B002.2L2DK_VFD Wiring Questions

[centroid467]

1. Yes to connecting S1 (spin fwd) to the N.O. terminal of relay 4. No to the ACM GND connection. Use DCM to the COM terminal of the relay.

2. Yes, connect VI to Acorn H8 VOUT and ACM to H8 COM

3. Yes, there should be a wire but it should be going to DCM.

4. Correct

5. Correct

This wiring should work assuming the VFD I/O parameters are set to defaults.

[thomsl@mac.com]

I am using a DZB Fuling VFD.

I have been working on the VFD setup today. I am having limited success. I do have the spindle turning on and off through CNC 12. I am using an Acorn 4-axis board.

My current problem is that I cannot control the spindle speed through CNC12. I am using VI (voltage input) and ACM (ground) on the VFD. These are connected to H8, analog ground, and analog out on the Acorn. I bench-tested the analog output before ever connecting things up. I have also checked the voltage output changes when I adjust the speed in CNC 12. It is working correctly.

I have also changed the parameters in the VFD.

F0.01 Command source must be on to 1 to be able to turn on the spindle from CNC12
selections:
0:Keyboard
1:Terminal
2:Communication

F0.03 Frequency command: This was already set to 1. When set to 0, the keypad shows H 4000, which is the top speed of the spindle. Neither the keypad nor CNC12 have any control over spindle speed.

Selections:
0:Keyboard
1:VI
2:CI
3:VI+ CI 0
4: Multi-speed
5: PID control
6: Communication

This is the link to the Fuling manual.

Thanks in advance for any ideas.

[centroid467]

So, you have verified:
1. SpinFwd commanded by Acorn works to start and stop spindle motion
2. Analog output from Acorn changes as expected
3. Correct command source (F0.01) and frequency command source (F0.03)

and it is not changing speed?


What frequency/speed does it run when you start it? If it is a particular number like the maximum spindle speed, maybe you accidentally set F0.06 = F0.05 or a similar mistake with F0.04.

Can you measure the analog voltage at the VFD VI and VCM terminals to see if it is changing correctly there? If you have access to an oscilloscope, it would be good to check for noise on those lines as well.
What are the values of VFD parameters F2.09-F2.13? They control the analog voltage input range and filtering time. It may be possible to set the min and max to the same value and get no speed adjustments.


(Note: you'd need both F0.01 and F0.03 set = 0 to use the up/down buttons on the keypad to adjust speed)

[thomsl@mac.com]

I went back and checked the wiring several times. It is correctly wired. I have also gone back and checked/changed the parameters of the VFD; however, I am still stuck. I have tried to clear up some terms. The control on the VFD is referred to as a keypad. Many selections refer to "keyboard," which may imply external control.

These are all the configurations you mentioned and their current settings. I may have only kept one parameter change that I have made

F0.01 = 1 Command source must be on to 1 "terminal" to turn on the spindle from CNC12. When it is changed to 0 (Keyboard, this makes sense), I cannot turn it on using the controls in the CNC12 software.

F0.03 Frequency command: This was already set to 1. When set to 0, the keypad shows H 400(RPS), the top speed of the spindle. Neither the keypad nor CNC12 have any control over spindle speed. When started, the spindle ramps up to 400RPS or 24,000 RPM.

These were all set as follows. I have not changed them yet.
F0.04 Maximum output frequency 10.00~600.00Hz It is set to 50.00Hz
F0.05 50.00 Hz
F0.06 0.00 Hz
F0.07 50.00 Hz

You mention that maybe F0.04, F0.05, and F0.06 should not be the same, and they are. What do you recommend they be set at?

Values of VFD parameters (I have not ever changed these values)
F2.09 = 0.00 Volts
F2.10 = 0%
F2.11 = 10 Volts
F2.12 = 100%
F2.13 = 10s

Your last statement: (Note: you'd need both F0.01 and F0.03 set = 0 to use the up/down buttons on the "keypad" to adjust speed)

I assume you mean in CNC12, not the keypad on the VFD.

I appreciate you sticking with me on this.
Scott

[centroid467]

Hello Scott, I may not have explained myself well here. I'll try to clarify.

F0.01 = 1 Command source must be on to 1 "terminal" to turn on the spindle from CNC12. When it is changed to 0 (Keyboard, this makes sense), I cannot turn it on using the controls in the CNC12 software.

F0.03 Frequency command: This was already set to 1. When set to 0, the keypad shows H 400(RPS), the top speed of the spindle. Neither the keypad nor CNC12 have any control over spindle speed. When started, the spindle ramps up to 400RPS or 24,000 RPM.

The drive manual seems to suggest that the "H400" display should be showing the output frequency setpoint but that does not make sense considering F0.04 which sets the maximum output frequency is set to 50 Hz.

F0.01 and F0.03 should be set to 1 as you already have them.

These were all set as follows. I have not changed them yet.
F0.04 Maximum output frequency 10.00~600.00Hz It is set to 50.00Hz
F0.05 50.00 Hz
F0.06 0.00 Hz
F0.07 50.00 Hz

You mention that maybe F0.04, F0.05, and F0.06 should not be the same, and they are. What do you recommend they be set at?

They should not be the same as I would expect having the maximum and minimum output frequency set to the same value to only ever output that one frequency. Your maximum and minimum are not set to the same value so you do not have that issue.

Your settings are the default which set the maximum output frequency to 50 Hz, the maximum output frequency setpoint to 50 Hz, and the minimum to 0 Hz.

The drive manual does not really say what to set in F0.04 but I would suggest keeping it at or below the motor's rated maximum frequency.

If you are not planning to command the maximum speed of the motor then set F0.05 to an appropriate frequency less than the value of F0.04. Otherwise, set F0.05 = F0.04.

F0.06 should be used to set the minimum commanded speed. This can be useful if the motor does not run well below a certain speed.

The calculation of the frequency for a certain speed is simple ratios. Frequency = (Max frequency * Desired RPM) / Max RPM.

Values of VFD parameters (I have not ever changed these values)
F2.09 = 0.00 Volts
F2.10 = 0%
F2.11 = 10 Volts
F2.12 = 100%
F2.13 = 10s

There should not be any need to change these parameters at this point. I suggested checking their values because that set also contain a minimum and maximum setting that could disallow changing the commanded frequency if set to the same values.

Your last statement: (Note: you'd need both F0.01 and F0.03 set = 0 to use the up/down buttons on the "keypad" to adjust speed)

I assume you mean in CNC12, not the keypad on the VFD.

I appreciate you sticking with me on this.
Scott

That last statement was intended to make it clear that both of those VFD parameters needed to be set to those values in order to try to adjust the speed from the "keypad" on the drive itself.

At this point I have no clue what could be going on here. Could you please post pictures of the wiring and a report from CNC12?

[ShawnM]

The Fuling VFD's are good VFD's and do work very well with Acorn. I've wired several of them up with no issues. With all the changes you made back and forth I'd suggest a reset of the VFD's parameters to factory settings. Then change only the settings in section F1 to match your spindle motors parameters. Power, freq, speed, voltage and current, etc. This should then allow manual control of the spindle from the controls (keypad/keyboard) on the VFD itself.

Then change only the parameter to switch control from the keypad to the terminals. F0.01 should then be set to 1. If you have it wired correctly it'll then work through the Acorn.