Re: [CAD_CAM_EDM_DRO] motor types

From: <info.host@...>

> >From what I remember Wayland that's it. Servos are handy obviously

because

> the rotor is not going to always be in the exact spot the controller tells
> it to be 100% of the time. Servo's sometimes have a tachometer as well to
> measure the actual rotor speed. The encoder will be at the end of the

motor

> and will have little wires coming out which give the feedback, make sure

the

> ones on the motor your pop has aren't just the supply for the motor.

Servos

> are smooth running, quiet, quick and accurate. They're expensive as well.
> Not so much the motors but the things needed to run them which can be
> 'pricey' compared to steppers. If you are planning to fit the servos to a
> large, accurate machine that will be running under quite a demand (I.e.

must

> work quickly and accurately) then it's worth it. If you are fitting them

to

> a Sherline to just mill bits that you don't mind taking a little longer

it's

> best to go with steppers. Where is your pop finding all these darn motors
> anyway? I know you mentioned him working with was it printers and
> photocopiers?

Stupid guy question coming... How many wires
*typically* come from the motor itself on a servo?
(so I can try and figure out what I'm looking at when I get it)
Yep, he sells and services copiers, printers, and fax machines.
Been doing it for 30+ years.
He found this one (and the others) in his parts bins.
The steppers he got me (85 oz/in) come out of HP LaserJet II's and III's.
The previously mentioned 5 wire DC gearmotor was out of an unknown copier,
used to drive the gear train and squirrel cage fan.
This possible servo, he has no idea where it came from.
He just called me and read the stuff to me and described it.

My intention is that if he finds stuff for me that I can use,
to find out where it came from and let everyone know
where to get them. (i.e. - what machines they came out of and such)
Hopefully, this will save people money.
(like knowing the steppers come out of the HP's)

I saw them advertised for $40 each, and he says if someone's
got them in their shop they would probably sell one to ya for about $10.

Thanks for your help,

Weyland