help with potters wheel

[petejohn]

hi can anyone please give me some advice. I have aquired an old potters wheel that needs attention it is aproximatly 20 years old it uses a normand electricial 220v dc shunt motor and a berco hsr42a dc speed controller. the motor works fine but the speed controller has a row of 3 0.1uf capicitors inter spaced with 2 resistors at the front of this bank is a component i am unable to identify it is about 1 inch long and 5/16 inch diameter and green in colour it appears burnt and is open circuit. it has a live 240v supply to one side and the other side connects to the ~ connection of a diode pack. i have had suggestions that it is a resistor and also that it is a high powered diode i would be most greatfull for any advice.

 

[itsmoked]

Most likely it IS a resistor.

That fits with something that gets hot all the time and eventually oxidizes to the point of failure.

If you want a more definitive answer put in a picture of it.

See: faq238-1161

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[jraef]

Could be anything, but not likely another diode in front of the diodes. Maybe an MOV to protect the diode bridge? The have a tendency to fail open circuit.

PS; expect to see your post deleted on Monday when the admins return. Homeowner type posting is not permitted. Try taking a picture of it and posting to a DIY forum for consumer electronics such as this one

http://forum.eserviceinfo.com/

 

[nbucska]

or post it at

http://www.engineeringforum.org/

-- they
are more tolerant....


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