Fredrick Paget on wed 30 apr 03
It is quite easy to reverse a permanent magnet field D.C. motor. That is
what most modern wheels use. All you have to do is reverse the two wires
going into the motor.
This is most easily acomplished with a double pole double throw toggle
switch. Get one big enough to handle the motor current and I reccomend one
with a center off position so you can pause a moment in the off position
before reversing the motor. This is a good idea as it is hard on things to
reverse the motor when it is running. Probably blow fuses and stuff. These
switches go in a hole in the panel - usually a 1/2 inch hole.
I think I put this in the archives some years ago but anyway here goes again.
The switch has 6 terminals on the back arranged in pairs.
You connect the corner terminals in an X configuration and the juice goes
in at the center pair and comes out the end- reversed or not depending on
which way you throw the switch handle.
|<---- from controller---
|
O O O------->to motor
\ ____ /
_____\ ___/
/ \ ___
| O O O-------->to motor
|
|<---- from controller---
Have fun and don't forget to disconnect the wheel before you try this.
Fred
>I have a quite elderly Brent B. I know its motor can be reversed, but I
>have never seen a reversing switch. With all the "publicity" reversibility
>just has gotten, is there a retrofitable switch? Something I could install
>(and Kelly too) that would do the trick.
>
>ElectroWizards? How about it?
>Lili Krakowski
From Fred Paget, Marin County, California, USA
Lily Krakowski on wed 30 apr 03
I have a quite elderly Brent B. I know its motor can be reversed, but I
have never seen a reversing switch. With all the "publicity" reversibility
just has gotten, is there a retrofitable switch? Something I could install
(and Kelly too) that would do the trick.
ElectroWizards? How about it?
primalmommy writes:
> I have a student with one hand. With smaller pots he can use the hand he
> has, pulling toward himself, but as he gets more skilled and wants to
> work bigger, wider, taller, he's working into his own fingertips. I am
> looking into spending my tax refund on a student level creative
> industries wheel simply BECAUSE it will reverse directions between
> students.
>
> Yours, Kelly in Ohio
>
> _______________________________________________________________
> Get the FREE email that has everyone talking at
> http://www.mail2world.com
>
> ______________________________________________________________________________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
Lili Krakowski
P.O. Box #1
Constableville, N.Y.
(315) 942-5916/ 397-2389
Be of good courage....
Michael Wendt on thu 1 may 03
Lily,
get a double pole double throw toggle switch. (Typical cost is less than
$7.00) You want one designated with on- (no off position). On the back are
six terminals. Look at how the handle moves. Up connects the middle set to
the lower set. Down connects the middle set to the upper set. Cut the leads
from the controller to the motor. One will likely be black, the other white
and a third may be green. The green wire is the ground and must remain
soundly connected. Attach the two remaining wires from the controller to the
middle two terminals of the switch, connect the wires from the motor to
either the top or bottom terminals, then make two small jumper wires and
connect them from the top terminals to the bottom terminals in an "X"
pattern so that they reverse the current to the motor in the alternate
position. IMPORTANT! the switch and all connections must be in a safe
enclosure since you are dealing with lethal voltages AND never move the
switch with the power on. Reversing should only be done without power. Good
luck,
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Avenue
Lewiston, Idaho 83501
1-208-746-3724
wendtpottery.com
Lily wrote:
I have a quite elderly Brent B. I know its motor can be reversed, but I
have never seen a reversing switch. With all the "publicity" reversibility
just has gotten, is there a retrofitable switch? Something I could install
(and Kelly too) that would do the trick.
Electro? How about it?
primal writes:
Fredrick Paget on thu 1 may 03
Just one little point of ambiguity I want to clear up.
In the connection diagram below there is no connection in the middle
of the X where the two wires pass over each other.
Fred
>It is quite easy to reverse a permanent magnet field D.C. motor. That is
>what most modern wheels use. All you have to do is reverse the two wires
>going into the motor.
>This is most easily acomplished with a double pole double throw toggle
>switch. Get one big enough to handle the motor current and I reccomend one
>with a center off position so you can pause a moment in the off position
>before reversing the motor. This is a good idea as it is hard on things to
>reverse the motor when it is running. Probably blow fuses and stuff. These
>switches go in a hole in the panel - usually a 1/2 inch hole.
>I think I put this in the archives some years ago but anyway here goes again.
>
>The switch has 6 terminals on the back arranged in pairs.
>You connect the corner terminals in an X configuration and the juice goes
>in at the center pair and comes out the end- reversed or not depending on
>which way you throw the switch handle.
>
> |<---- from controller---
> |
> O O O------->to motor
> \ ____ /
> _____\ ___/
> / \ ___
> | > O O O-------->to motor
> |
> |<---- from controller---
>
>Have fun and don't forget to disconnect the wheel before you try this.
>Fred
From Fred Paget, Marin County, California, USA
Fredrick Paget on thu 1 may 03
Just one little point of ambiguity I want to clear up.
In the connection diagram below there is no connection in the middle
of the X where the two wires pass over each other.
And Michael - good point about the ground. I forgot that it might be in the
same cable. We don't want to mess with the ground. It always goes straight
through.
Fred
>It is quite easy to reverse a permanent magnet field D.C. motor. That is
>what most modern wheels use. All you have to do is reverse the two wires
>going into the motor.
>This is most easily acomplished with a double pole double throw toggle
>switch. Get one big enough to handle the motor current and I reccomend one
>with a center off position so you can pause a moment in the off position
>before reversing the motor. This is a good idea as it is hard on things to
>reverse the motor when it is running. Probably blow fuses and stuff. These
>switches go in a hole in the panel - usually a 1/2 inch hole.
>I think I put this in the archives some years ago but anyway here goes again.
>
>The switch has 6 terminals on the back arranged in pairs.
>You connect the corner terminals in an X configuration and the juice goes
>in at the center pair and comes out the end- reversed or not depending on
>which way you throw the switch handle.
>
> |<---- from controller---
> |
> O O O------->to motor
> \ ____ /
> _____\ ___/
> / \ ___
> | > O O O-------->to motor
> |
> |<---- from controller---
>
>Have fun and don't forget to disconnect the wheel before you try this.
>Fred
From Fred Paget, Marin County, California, USA
| |
|
