I have a Milltronics Milling machine which I was told by Milltronics could be run from single phase provided I put the 220 lines on L1 and L3. Well ne edless to say the VFD did not last to long.
When I contacted the drive manufacture they told me that the Drive was not rated to have single phase input and that the drive could only be used for a motor of 1/2 of what it was rated for if three phase power was supplied. They even gave me a technical manual to explain why. Long story short you can not put single phase power in to any VFD rated for three phase input and expect the VFD to provide the same rated HP or Curre nt output when you only supply single phase input.
With the now fried and obsolete VFD as a guide I purchased a replacement V1
000 single phase drive from Yaskawa at 1/3 the cost of what Milltronics wan ted for a F7 drive rated for three phase input. When the drive arrived not to long ago I noted that the HP of the motor was 7.5 and the AMPS was 19 no t the 17.5 on the now fried VFD. Well it appears that Milltronics company d id not size the drive correctly in the first place even if three phase powe r was to be used which is NOT the case here as they do not have three phase power on my street. No worries as I will use it anyway as I never take lar ge cuts or have big face mills....Now the fun begins
When I connect the wires all up to the new drive and with a phone call to Y askawa as the new drive terminals are not marked or named the same as the o ld ones I think I have things wired correctly.
I power the drive and it comes to life or so I thought
With the belts removed from the motor to the spindle I do the auto tune as noted in the V1000 quick start book. All seems well and the drive does oper ate the motor when run in local mode and I control things from the keypad.
I restart the machine by using the large switch at the back of the machine.
I note the computer seems to be DEAD no screen or anything but did note a f lash on the computer screen at power up so the screen got power for a short time and the lights did the normal flash....However the cnc machine is in Estop as normal startup and the computer screen is black.
I press the reset button and the machine goes from Estop back to Estop with only a micro second in between. Still no computer and no temporary flash o n the screen.
I go to the back of the machine and note no errors on the drive readout and the lights on the computer acroloop cards (green light) is light up so thi ngs look normal from the back and at least I know the computer is getting p ower.
I opted to use the V1000 drive as it is available in single phase input.
Why is the machine in Estop with no computer and when reset is pushed its s till stuck in Estop with no computer. Typically the machine starts up with the machine in E-stop but we have a co mputer readout.
How do I fix this??? Milltronics is of no use as they have stated they do not have any experienc e with the V1000 and only when I advised the general manager that the f7 dr ive was no longer in production and that the drive they would have sold me was not rated for single phase input did they now state that they where con verting to the A1000 drive.
Milltronics still states that the VFDs they use can be used on single or th ree phase and they do not comprehend the fact that you need to use a larger drive because of the added total harmonic distortion and the fact you are asking two diode pars to do the work of what three used to if the machine i s supplied with single phase power VS Three phase power.
The machine in question is a partner 1h bed mill serial m3165 the machine had a Safetronics PC3 drive in it
If anyone has a v1000 machine and could tell me where the control wires are connected on the v1000 that may help
I had also asked Milltronics about adding a fourth Axsis to the machine and advised them that I could purchase an acroloop card (seeing as they couldn 't sell me one) and they could not tell me how to configure it to work.
Thank You Regards Stan