erratic spindle speeds Askpower inverter series a131 (SOLVED)

[kwkenyon]

I'm using smaller taps, 10/32, 1/4-20 spiral taps, in aluminum. The G84 canned cycle decelerates 0k, Parameter 37, before the M3 to go out is called. I'm still tweaking it for this machine. Definitely a learning process. I can work with my spindle speed dilemma. Will post when perfected. Its only a hobby for me, no production going on here, but darn interesting. Thank you.

[martyscncgarage]

I'm using smaller taps, 10/32, 1/4-20 spiral taps, in aluminum. The G84 canned cycle decelerates 0k, Parameter 37, before the M3 to go out is called. I'm still tweaking it for this machine. Definitely a learning process. I can work with my spindle speed dilemma. Will post when perfected. Its only a hobby for me, no production going on here, but darn interesting. Thank you.

Share screen shot of your DMMDRV screen for the DYN4
Still would like to see a video of it tapping, and how the spindle is starting and reversing during the tapping operation
That would be most helpful.

Marty

[springlakecnc]

Askpower update : it almost runs perfect. I would advise against buying this drive, go the extra few dollars and buy a genuine Huanyang inverter or better.

Final conclusion, We set the drive to max out at 60 htz. The best way to get the analog signal working smooth is to only use the +10 volt wire and don't even hook up the analog ground or analog common coming out of Acorn, just the 10volt line. The only "gnd" terminal on the Askpower seems to mess with Acorns signal if you hook the analog common up.

We did have an Askpower 3hp drive that seemed to work with Acorn in a previous retrofit, but its long gone now. I remember when i changed speed with the 3hp drive, it sounded like a little internal motor turned something inside the drive and the speed would change. The 5hp drive is not like that.

This is what we ended up with after eliminating the analog common wire. We set top spindle speed at 3,500 @ 60 htz. we started backing the speed down while watching the analog signal and the htz readout on the Askpower drive, this is what happened with all 3 Askpower 5 hp drives we have and this is very strange. (they were swapped out, we were not running them at the same time) The analog signal and the drive both ran smooth and decelerated as they should until we got to 400 rpm, that's when strange things started. The htz readout and the analog went smooth right down to 0 rpm's but at 400, the motor sped up to what we guessed about 2,000 rpm's although the htz readout showed what it should at 400 rpms and the analog signal was correct and smooth for 400. going down to 350 rpms, the spindle stopped even though it showed correct htz and the analog signal was smooth and correct. Then at 250 rpm's, everything went back to correct and normal on down to spindle stop. This was exactly the same with all 3 of the drives, same results going up or down in speed, using the Acorn manual speed change button or the wireless hand wheel or using MDI and telling Acorn the speed and direction, exactly the same. I went and got a different motor, 3hp, hooked it to the 5hp drive, and it did exactly the same thing, proving my 5 hp motor is ok, and its the drive messing up. If you never ran between 300 and 500 rpm's, everything was great!

The 5hp Askpower ran fine using its own panel on the front, but I'm not going to waist any more time on this drive, our new drive should be here any day now.

[martyscncgarage]

I suggsest GS1, GS2 or GS3 VFD's from automationdirect.com
Buy once Cry Once....
Your time is worth something....