Electric motor data plate interpretation

[Righty Tighty]

How about a pic of this beast of a sander? I've got a 12" disk/6x18 belt combo Rockwell industrial sander that runs maybe a 2-3hp 220v single phase motor and for the most part, it plows through anything I throw at it. I can't imagine a sander that requires 26hp and what you'd need to feed it to bog it down.

I have an older US made Delta unit like yours - 12"/6x18" combo, cabinet base. Love it! It's one of my favorite machines, but mostly just use it for on-the-fly shaping and woodwork.

This unit is specifically for profiling metal. It has a 36" wide capacity and thickness range of 18 gauge to 6". It's just over 6' wide by about 6-1/2' tall, and I'll be using a wet dust collector with it. It has two drums, one for the sanding belt and one for a drum that gives a brushed finish, if desired.

Infeed side:

Outfeed side:

Dust collector:

 

[ProjectBazza]

So what do you do, change 1 set of stators 1 phase rotated in reference to the 1st set, to create more poles?

Yes, more or less. Not sure if I can find a better explanation than below, which shows two drawings to help explain what I meant when I said "series and parallel". Hopefully they help.

And the links where I found them:

Three Phase Two Speed Motor

Two speed (4 & 8 pole) constant torque motor Arrangement windings. Low Speed: 2 pole -- Series Delta ...

electricaltechnologyblog.blogspot.com

EEE COMMUNITY: Dual-Speed, Three-Phase Squirrel-Cage Single-Winding Motor

xxxxx

eeecommunity.blogspot.com

The "series and parallel" may or may not be entirely accurate ("technically speaking" and all that), but this is how I visually remember them in my head.

 

[Killer6]

try this

https://control.com/textbook/variab...c-motor-speed-control/#animation_3phase_motor

or this

.

The fan blower motor in your AC system is capable of several speeds, mine can be set to 4-5 different speeds just by changing which 1 wire connects to the 120V AC supply terminal. Not sure how it is internally wound, might be that one wire feeds 2 poles and one feeds 4 etc. I recall from the Chrysler Master Tech video on wiper motors that the angle between the brushes changes the speed. It's DC so it might not be the same.

DC is entirely different. Take a rad fan, some are resistance variable, some are dual-winding, some are a combination of both. Most Mopar 2-speed rad fans are dual winding, low-speed only engages the pair of brushes for 1, then engages the second pair @90° for high-speed.