Gday All.
My old Richardson DP had a 3 phase motor on it when I first got it back in the mid 1970's. At the time (not having 3 ph) we removed it and replaced it with a 2 speed, single phase washing machine motor which has done (and is still doing) sterling service. I have no idea what the power of this motor is and cant remember what the original 3 ph was. The current motor is more than likely only 1/4 hp or even less but I've never had an issue with it being too small.

When I refurbished the old DP about 25 years ago (geez writing that makes me feel old) I replaced the original 3 step flat pulleys with 4 step V pulleys so ending up with 8 speeds. However the lowest speed is still around 400 rpm which is way too fast for larger hole saws or trepanning tools etc. When I converted it to 4 step pulleys I also got an extra pulley with the intention of one day making a compound drive for it. That hasn't happened and is not going to.

Now though, with VFD's being so cheap, I'm leaning towards fitting a 3 phase motor and VFD to get the variable speed control.
So can someone who has a decent DP (either Richardson, Brobo or Tough etc) be so kind as to have a look and tell me what size motor and speed is fitted please? I want to start looking for a 3 ph for my old DP.

dp 004.jpg


Thanks in advance.
Peter
Attached Images




Read the full thread at metalworkforums.com...