What's the current draw when it's stalling?
Hi,
I purchased a 2.2kW 4 pole watercooled chinese spindle + Filing inverter, cutting a hardwood with a 1/2 2 flute @ 5-7mm doc 7mm stepover 2500mm/min 10k rpm the spindle would get dangerously slow to the point that it would stall if I didn't stop it.
As it turns out the inverter was advertised as sensorless vector capable but that is only up to 60Hz..
Cutting at 3mm doc with above settings the inverter pulls about 1.5A. Off the top of my head Gwizard calc estimated the required power to be approx 250w which I assumed it should be more than capable of at that rpm?
My question is would a good quality (branded) vfd capable of open loop solve my problems?
The spindle stayed quite cool to touch after 5 hours of cutting maybe 30 degrees on the outside jacket.
Any help would be great thanks
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What's the current draw when it's stalling?
Gerry
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Not sure what the current is when it stalls but the most I've seen it get to is 1.8A @10k rpm usually about 1.1A. I've gone through all the settings and it's set to 10A and can't seem to find any other settings that could contribute..
You have your Parameters set incorrect so don't run your spindle with these setting or you will smoke your spindle
If you only have a 60Hz VFD which I doubt that you have, this will smoke your Spindle if it can only be set to 60Hz
If you are able to get 10,000 RPM you are not using a 60Hz only VFD Drive
Post what your VFD Drive spec's are model number photo
Mactec54
Hi,
The inverter is a DZB312B002.2L2DK and I managed to get it running properly. In the manual there is an inverter model type selection and this inverter needs to be set to a "2" which isn't listed as an option (see attached).
Also had a reserved function which needed to be set to 1235..
These manuals are a little bit cryptic
Spindle cuts really nicely now.
How do you know your running 10,000 RPM? Mactec54 knows VFD settings so listen to what he is asking.
1000x750 Workbee CNC - Mach4 - PMDX USB - Windows 10 Pro
Max RPM = 24000
Max Amps = 8
Max Hertz = 800
Everything is reset to default (as per the sellers instructions)
And then set
F3.01=1235 - reserved function
F0.04=800 - Max Freq
F0.05=800 - Upper limit
F1.02=800 - Motor rated freq
F1.03=24000 - Motor rated speed
F1.04=220 - Motor rated voltage
F0.03=1 - VI freq command selection
F0.01=0 - Terminal
Inverter seems to default motor rated current to 8 Amp.
I don't have a way of measuring the speed, only what the inverter tells me 24k/800Hz..
The seller is just that and would not really know how to setup your VFD Drive or what any of the numbers mean
I don't know why you would of messed with this Parameter F3.01=1235 - reserved function
What mode are you using Parameter F0.00= 0 Or 1 ????
F0.06=100
F0.07=800
Once you have checked your motor Parameters are correct you can then Auto Tune to your motor see snip F1.11=1
F1.01=2.2
F1.02=800
F1.03=24000
F1.04=220
F1.05=8 ( Or Your Motor Rated Amps )
Mactec54
Sensorless vector without auto tune would be like buying a new car without wheels, they are telling you BS 50-60Hz is only for V/F I have heard a lot of Bs from sellers, this kind of tops the list
The series 300 has Auto tune I have the different manuals Series 100 200 and 300
You may have been sold a copy if it is the 300 series and does not have Auto Tune
So set F0.00=0 and test run it to see if you have any improvement
Mactec54
That would make sense as it seems to be a 200 series drive which does not have Auto Tune, I would say you have a VFD Drive that is not suitable for the spindle you have, these drives are normally quite good
If you need / buy a sensorless vector control than make sure the VFD has Auto Tune
Do you have a web link from where you brought it from
Mactec54
That is a good spindle brand name not used by many but I have used there spindles
By there specs they have a minimum working speed of 12,000 so running it at 10,000 may have been some of your problem even though it can run at 10,000 it would not have very much torque at that speed by what there spec's are,I would say even though it is a 4 Pole it should have a lower speed
I have one of there 2.2Kw 2 pole and it is good down to 3,000 up to 24,000
It also has a 10A rating not 8A that you have set, it would have to be set at 10A in the VFD Drive, then it comes to the VFD Drive which may not suit your spindle when using single phase power as the VFD max output is 10A this should be at least 12A minimum, so the VFD Drive is borderline at best
What is your Amperage for the 240v supply power to the VFD Drive
Mactec54
Your VFD required needs to be larger than your spindle so 3Kw to 4Kw and rated for 800Hz or more
I think you have a power supply problem to start with 15A supply is not going to run a 2.2Kw spindle
You need a minimum 240v supply at 25A most have use 30A Circuit for the 2.2Kw spindle
Can you post some photos of the wiring, you may not have a VFD Drive Problem
Mactec54