Rewiring Panasonic SD-200 Breadmaker

[kingaboy]

Re: Rewiring Panasonic SD-200 Breadmaker

Hi,

I know this topic hasnt been touched for while, but I had a question on the start capacitor. I have a Panasonic SD-251 which is basically the same as the 200 so I wired it up and all is working OK. I basically ripped out all components and left the capacitor on the circuit board to keep it tidy. I noticed though that there is a noticeable difference in motor sound without the capacitor connected. If it is a "start" capacitor, shouldnt it be connected momentarily to kick the motor over. I tried doing just that and touching the capacitor with the neutral wire kicks it over and then it runs fine without the wire connected.

Just wondering if the electronic circuit that is normally there does a kick start via a switch on board and if either way is going to shorten the life of the motor.

BTW thanks for the mod details.

[A_M]

Re: Rewiring Panasonic SD-200 Breadmaker

Hi,

I know this topic hasnt been touched for while, but I had a question on the start capacitor. I have a Panasonic SD-251 which is basically the same as the 200 so I wired it up and all is working OK. I basically ripped out all components and left the capacitor on the circuit board to keep it tidy. I noticed though that there is a noticeable difference in motor sound without the capacitor connected. If it is a "start" capacitor, shouldnt it be connected momentarily to kick the motor over. I tried doing just that and touching the capacitor with the neutral wire kicks it over and then it runs fine without the wire connected.

Just wondering if the electronic circuit that is normally there does a kick start via a switch on board and if either way is going to shorten the life of the motor.

BTW thanks for the mod details.  

As your an electrician... You should Know...

If ya not... Dont touch......

If ya continue to play... Then your choice and any outcomes are for you to own.

[capacitor]

Re: Rewiring Panasonic SD-200 Breadmaker

I noticed though that there is a noticeable difference in motor sound without the capacitor connected. If it is a "start" capacitor, shouldnt it be connected momentarily to kick the motor over. I tried doing just that and touching the capacitor with the neutral wire kicks it over and then it runs fine without the wire connected.

Just wondering if the electronic circuit that is normally there does a kick start via a switch on board and if either way is going to shorten the life of the motor.

No it doesnt, because it is not a "start" capacitor at all; the motor is in a PSC configuration. It will sound different with the capacitor disconnected because there will be one phase missing; it will lack power and should not be run like this. It is also unlikely to start on its own without the capacitor because it wont know which direction to rotate in; in fact, you can reverse the motor by connecting the capacitor to the opposite supply wire. This does not mean the capacitor is a "start" capacitor though; it is supposed to be in circuit all the time. There is a triac on the PCB to control the motor, and that behaves just like a simple switch. There is no other control circuitry for the motor.

(Another geek point: the heating element is controlled by a relay - black square thing you can hear clicking on and off. This is more expensive and less reliable than the triac which controls the motor, but a triac has a voltage drop which leads to it giving off heat. With a small load like the motor, the heat will be minimal but for the heating element it would be considerable and would have to be quite a large device with a heat sink. Hence the use of two different types of "switch" for the two components of the machine.)