I recently bought an Ultimate Bee CNC with the generic 2.2Kw Air Cooled 220V spindle and the Huanyang VFD.
I got an electrician to do all the wiring, and we did all the VFD configs based on the various docs we found.
The issue we’re having is that the spindle starts accelerating but the voltage never goes up to 220V however the current (Amps) drawn by the spindle rapidly jumps to 8-10-12-18A and the VFD trips. At the third attempt the VFD had a meltdown in a cloud of smoke.
I bought a second VFD from Vevor and after all the configs this behaves the same, but this has high current protection so it always trips with an error. We tried to force voltage to 220V, we tried to make it start very very slow or very very fast, always the same behaviour, voltage stops around 140-150V and current goes to 18A where it trips. We set the 18A as the max current in the VFD so we don’t burn something else. Normally the total draw of this spindle should be no more than 9A.
Yes, we checked all cables, no shorts, nothing out of the ordianary.
Any ideas? I feel that I need to buy another spindle, but I’d rather not as they are not cheap.
220V is the maximum rated voltage for the spindle, not the ‘drive voltage’ for it.. The actual voltage for a given output power is determined by it’s inductance/resistance. You vary the speed by increasing the voltage, did the spindle ship with a voltage/power curve or similar?
Anyway.. some maths:
If I put in 140v at 18A with a power factor of 1 I get a total power of 2.5Kw for a single phase supply. Which sounds right for your spindle.
Eg 220V is just ‘the maximum voltage’ for the spindle, not ‘the voltage at which it makes it’s rated power’
I’m assuming that this is a 3ø spindle; you can drive a 1ø motor with a VFD but these spindles are normally 3ø and the speed should be controlled synchronously with frequency; the VFD is an “ESC”.
I’m not an expert in VFD configuration; my VFD came with appropriate settings and I didn’t change them. But providing neither the settings nor the documents you used makes it harder for anyone reading this to respond analytically; you are asking people to guess.
Thanks everyone for the input. I’ll be more clear.
Spindle is VHD are these 1.5/2.2kW Spindle and VFD [Maker Hardware] - the 2.2kW version air -cooled version with the Huayang VFD. This is not where I bought them from but they are the identical ones that various suppliers sell together.
This is a 2.2kW 3Phase spindle, with a 4 wires cable 1,2,3,4 where 4 is the ground. Input in the VFD is single phase 240V (Australia). Ground from the 240V input is connected to both the ground of the input and the ground of the spindle (wire 4 above) as per instructions.
The settings were done like this:
Source of Run Commands Pd001 - 0
Source of operating Frequency Pd002 = 0
Max operating Frequency Pd005 = 400
Main Frequency Pd003 = 400
Base Frequency Pd004 = 400
Min Frequency Pd007 = 0.50
Max Voltage Pd008 = 220
Intermediate Frequency Pd009 = 15
Min Voltage Pd010 = 8.0
Frequency Lower Limits Pd011 = 133.33
Acceleration Time 1 Pd014 = 10
Deceleration Time 1 Pd015 = 10
Starting Mode Pd025 = 0
Starting Frequency Pd027 = 0.80
Rated Motor Voltage Pd141 = 220
Rated Motor Current 2.2KW: Pd142 = 9
Motor Poles Pd143 = 2
Rated Motor Revolutions Pd144= 3000
Once we switched to the Vevor VFD we and we wired it applied similar-ish settings (we did change and play with a lot of values once we couldn’t get this working but starting point was:
I am not an expert here (like I say, mine just worked…)
The fact that it’s drawing about twice the expected current with two VFDs makes me wonder if the spindle is miswired. You could try setting the maximum voltage to 110V and see what happens?
