Susan Fox Hirschmann on sat 10 feb 07
In a message dated 2/10/2007 6:42:41 AM Eastern Standard Time,
fredrick@WELL.COM writes:
My first guess is the reversing switch is shot.. It is a DPDT toggle
switch. Best to not operate it when the wheel is turning, These
switches are rated for a certain max current and reversing a running
wheel may exceed the rating.
Fred
--
This is a wheel with a reverse switch on it, specifically for left handed
people. I am trying to understand
what you are saying?
Since the company puts this switch on here to use, why not use it!?
Susan
Fredrick Paget on sat 10 feb 07
>In a message dated 2/10/2007 6:42:41 AM Eastern Standard Time,
>fredrick@WELL.COM writes:
>My first guess is the reversing switch is shot.. It is a DPDT toggle
>switch. Best to not operate it when the wheel is turning, These
>switches are rated for a certain max current and reversing a running
>wheel may exceed the rating.
>Fred
>--
>This is a wheel with a reverse switch on it, specifically for left handed
>people. I am trying to understand
>what you are saying?
>Since the company puts this switch on here to use, why not use it!?
>Susan
What I am saying is stop the wheel using the foot pedal and then throw
the switch. To do it with the wheel running is very hard on the cheap
little reversing switch.
To do it with the wheel running is like shifting your car into
reverse while running forward down the road.
Reversing these permanent magnet DC motors is really easy. all you
have to do is reverse the wires in the circuit to the motor.
My Jepson wheel did not come with a reversing switch. Instead they
put a plug and socket in the middle of the cord from the controller to
the motor. To reverse it you have to separate the plug from the socket
which naturally stops the motor and turn it 180 degrees and plug it
back in.
The Jepson has a far better controller than the Brent. I got tired of
having to go under the wheel to reverse it so I installed a reversing
switch. The first time I threw it with the wheel running I blew a small
fuse that the better controller maker had thoughtfully provided and
had to take apart the controller housing to get to the fuse.
So I replaced the DPDT reversing switch with a double pole switch
with a center "off "position. To reverse I move the toggle from the first
position to the center off position and pause then throw it to the third
position. 7 years that way now and no problem.
If you don't like all this then buy a bigger switch that can take a big
current surge.
Fred
--
Twin Dragon Studio
Mill Valley, CA, USA
fredrick@well.com
Charter Member Potters Council
Michael Wendt on sat 10 feb 07
Susan,
DPDT stands for double pole double throw.
The wires through the switch run like this:
red wire______...._____ + DC Voltage
motor \ /
black wire_____ / \______-DC Voltage
to reverse, the switch runs them like this:
red wire___________ + DC Voltage
motor
black wire___________-DC Voltage
If the one set of contacts is bad, the motor will
not run in the reverse direction.
All Fred meant was the motor must be at
full stop before you reverse the switch.
Reversing under power is not recommended.
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave
Lewiston, ID 83501
USA
208-746-3724
http://www.wendtpottery.com
wendtpot@lewiston.com
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