The next couple picture links to my album are how my MOLLEM VFD was hooked up to the ESS/MB3. The nomenclature for the MB3 is different from the Acorn and I am lost.
If there is a better schematic to follow I'm all for it.
Obviously I can change any connections at the VFD. I want to hook this thing up the best way to utilize everything built into the VFD so any help would be greatly appreciated.
Re: Retrofit My Build Looking at Switching from Mach4 to Centroid System
Posted: Mon Nov 04, 2024 3:00 pm
by centroid467
From reading the manual, I am not sure whether or not you will need to connect +24 VDC to the VFD terminal labelled +24V. Does it supply voltage of its own? Using a multimeter set to 200VDC (or DC volts if it is autoranging), is there +24V across the VFD's +24V and COM terminals when it is powered on?
If so, then do not connect anything to +24V terminal and use the VFD's COM terminal as the connection for the VFD COMMON signals on S15158.
You'll have to check VFD parameters F4-00, F4-01, F4-02, and F4-03 to see what functions are assigned to the digital inputs (terminals labelled Sx).
I am guessing since there are only two digital signals shown from the MB3 that the VFD would be set to have S1 and S2 as FWD and REV and the enable is controlled by the level of the analog signal.
It is quite possible that they left the VFD on default input settings so S3 would then be FAULT RESET.
Regardless of the current input settings, to match our schematic S15158, you will want the VFD parameters to be:
F4-00 = 1 which then gets the signal SPIN_FORWARD
F4-01 = 2 which then gets signal SPIN_REVERSE
F4-02 = 9 which then gets signal VFD_RESET
F4-03 = 0 and it will left disconnected.
F5-02 = 38 and you should wire SpindleOk to VFD terminal TB and the corresponding GND to VFD terminal TA (labelled FAULT COM on Centroid drawing S15158). This is using the drive's relay output to act as a drive fault signal.
You may need to adjust the settings of F4-38 to get the correct input behavior. I believe it should be set to 00111 to make S1, S2, and S3 active when the circuit is closed.
For the analog signals, copy the MB3 diagram:
Acorn's ANALOG OUT to drive's AI1
Acorn\s Analog GND to drive's GND
Re: Retrofit My Build Looking at Switching from Mach4 to Centroid System
Posted: Tue Nov 05, 2024 11:15 am
by Onawa220
centroid467 wrote: ↑Mon Nov 04, 2024 3:00 pm
From reading the manual, I am not sure whether or not you will need to connect +24 VDC to the VFD terminal labelled +24V. Does it supply voltage of its own? Using a multimeter set to 200VDC (or DC volts if it is autoranging), is there +24V across the VFD's +24V and COM terminals when it is powered on?
If so, then do not connect anything to +24V terminal and use the VFD's COM terminal as the connection for the VFD COMMON signals on S15158.
You'll have to check VFD parameters F4-00, F4-01, F4-02, and F4-03 to see what functions are assigned to the digital inputs (terminals labelled Sx).
I am guessing since there are only two digital signals shown from the MB3 that the VFD would be set to have S1 and S2 as FWD and REV and the enable is controlled by the level of the analog signal.
It is quite possible that they left the VFD on default input settings so S3 would then be FAULT RESET.
Regardless of the current input settings, to match our schematic S15158, you will want the VFD parameters to be:
F4-00 = 1 which then gets the signal SPIN_FORWARD
F4-01 = 2 which then gets signal SPIN_REVERSE
F4-02 = 9 which then gets signal VFD_RESET
F4-03 = 0 and it will left disconnected.
F5-02 = 38 and you should wire SpindleOk to VFD terminal TB and the corresponding GND to VFD terminal TA (labelled FAULT COM on Centroid drawing S15158). This is using the drive's relay output to act as a drive fault signal.
You may need to adjust the settings of F4-38 to get the correct input behavior. I believe it should be set to 00111 to make S1, S2, and S3 active when the circuit is closed.
For the analog signals, copy the MB3 diagram:
Acorn's ANALOG OUT to drive's AI1
Acorn\s Analog GND to drive's GND
You rock! Sorry for the slow reply, just finished 3 12 hour shifts and haven't had a chance to get back in the shop. Hopefully I can get to this today and get this finished up!
Re: Retrofit My Build Looking at Switching from Mach4 to Centroid System
Posted: Tue Nov 05, 2024 8:20 pm
by Onawa220
Ok I have most of those connected but I realized that the analog out1 and ground for it aren’t mentioned. Would those still be the A1 and GND I had the analogs connected to on the MB3?
Re: Retrofit My Build Looking at Switching from Mach4 to Centroid System
Posted: Tue Nov 05, 2024 8:53 pm
by tblough
Analog out from the VFD will not be used. Some of the other Centroid controls have an analog input where this could be used for a spindle load meter. Unfortunately, the Acorn does not have this.
As far as A1 goes, this is more likely AI (Analog Input) and where the 0-10V output from the Acorn goes.
Re: Retrofit My Build Looking at Switching from Mach4 to Centroid System
Posted: Tue Nov 05, 2024 9:21 pm
by Onawa220
tblough wrote: ↑Tue Nov 05, 2024 8:53 pm
Analog out from the VFD will not be used. Some of the other Centroid controls have an analog input where this could be used for a spindle load meter. Unfortunately, the Acorn does not have this.
As far as A1 goes, this is more likely AI (Analog Input) and where the 0-10V output from the Acorn goes.
I probably asked that wrong but your answer was what I was looking for Thank you.
Re: Retrofit My Build Looking at Switching from Mach4 to Centroid System
Posted: Tue Nov 05, 2024 9:26 pm
by Onawa220
I just realized that to do this right I probably need to connect my e-stop but also to really do it right I need a contactor. The one I had when it was factory is a 3 phase I believe and even though I thought I took good pictures and notes before ripping the cabinet apart I couldn't get it connected the same again.
What contactor would work? I have a separate 24v power supply in the cabinet for powering my laser and it should have plenty of power to trigger it.
Re: Retrofit My Build Looking at Switching from Mach4 to Centroid System
Posted: Wed Nov 06, 2024 1:07 pm
by RogDC
Looks like the one in your photo is a 24VDC coil 3 pole contactor. You should be able to use for single phase. https://baomain.com/products/cjx2-1810. There should be a label on the side with more information to verify it is a 24VDC coil.
Re: Retrofit My Build Looking at Switching from Mach4 to Centroid System
Posted: Thu Nov 07, 2024 12:49 pm
by Onawa220
Now I guess I need to figure this thing out. I gave up last time and just removed it
Re: Retrofit My Build Looking at Switching from Mach4 to Centroid System
Posted: Thu Nov 07, 2024 2:40 pm
by centroid467
The terminals labelled A1 and A2 are going to be for the signal that controls the contactor. Using that website that RogDC suggested, I found this picture which should show where the coil voltage information is. I circled the location in red:
contactor_coil_data.PNG (123.9 KiB) Viewed 2033 times
The pairs of L1-T1, L2-T2, and L3-T3 are the main contacts so those are what you would be running the main circuit power through.
Thank you.