Dewalt 925 radial arm - Woodworking Talk - Woodworkers Forum
 
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post #1 of 2 Old 09-22-2017, 09:36 PM Thread Starter
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Dewalt 925 radial arm

Im new to this forum and was wondering if anyone had experience with the vintage, (1959-1960)925 RAS. I just bought one in excellent condition. It was wired for 220. It ran fine at the sellers home. When I got it home I converted to 110, as per the institutions, but when I ran it there is a clicking in the electrical panel when it first starts up, a single click, and when I shut it down there is another 3 clicks. I believe its the brake doing this. I don't want to run it if there is a possibility of creating a motor problem..
any help would be appreciated!
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post #2 of 2 Old 09-23-2017, 12:57 PM
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Originally Posted by Steve Tsigounis View Post
Im new to this forum and was wondering if anyone had experience with the vintage, (1959-1960)925 RAS. I just bought one in excellent condition. It was wired for 220. It ran fine at the sellers home. When I got it home I converted to 110, as per the institutions, but when I ran it there is a clicking in the electrical panel when it first starts up, a single click, and when I shut it down there is another 3 clicks. I believe its the brake doing this. I don't want to run it if there is a possibility of creating a motor problem..
any help would be appreciated!
It is a potential relay that is making the clicking sound, Delta's do the same thing, at least the one I have that is about the same vintage

They should have never used a pot relay in them, but I suppose it works better than a centrifugal switch in a dusty environment

A potential relay opens up from the back electromotive force or EMF created by the start windings, when wired into 110 as the motor powers down there isn't enough back EMF to hold the relay closed so it will drop out then as the force builds up again it will open the relay and drain the force again. It really won't hurt anything, just the nature of the beast
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