Hi,
I have drill motor, from a reversing drill. It has 4 leads- 1 for each
brush, and 2 going into the motor. How do I connect these leads, and also
what do I change to reverse the direction. Thanks very much for your help!
Joe

In article ,
says...
Hi,
I have drill motor, from a reversing drill. It has 4 leads- 1 for each
brush, and 2 going into the motor. How do I connect these leads, and also
what do I change to reverse the direction. Thanks very much for your help!
Joe


If this motor is from an AC powered drill it's a universal
series motor. Name the leads going to the brushes A1 and A2
(A for armature) and the other two F1 and F2 (F=field). Tie
A2 to F1 and apply power to A1 and F2. To reverse tie A2 to
F2, power to A1 and F1.

I expect this would apply to most rechargeable drills as
well, but don't know for sure.

Ned Simmons

Ned Simmons wrote:

In article ,
says...

Hi,
I have drill motor, from a reversing drill. It has 4 leads- 1 for each
brush, and 2 going into the motor. How do I connect these leads, and also
what do I change to reverse the direction. Thanks very much for your help!
Joe



If this motor is from an AC powered drill it's a universal
series motor. Name the leads going to the brushes A1 and A2
(A for armature) and the other two F1 and F2 (F=field). Tie
A2 to F1 and apply power to A1 and F2. To reverse tie A2 to
F2, power to A1 and F1.

I expect this would apply to most rechargeable drills as
well, but don't know for sure.

Ned Simmons

AFAIK rechargeable drills use permanent-magnet motors -- at least my
Makita, the DeWalt's that are torn apart for model airplane power
plants, and the Black & Deckers that a friend of mine used to help
design are all built with them.

Universal motors are bulkier than PM DC motors, and may not be as efficient.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

In article ,
says...


AFAIK rechargeable drills use permanent-magnet motors -- at least my
Makita, the DeWalt's that are torn apart for model airplane power
plants, and the Black & Deckers that a friend of mine used to help
design are all built with them.

Universal motors are bulkier than PM DC motors, and may not be as efficient.



I'll buy that. The universal motor's big advantage is being able to run
on AC, which is no advantage for a rechargeable. Especially with modern
magnet materials, I don't doubt the PM motor is both more compact and
more efficient.

Ned Simmons