Large dough mixer acting up -different diagnoses
We use a fairly old -30+ yrs-, but still very serviceable, Boku two-speed spiral bread dough mixer. Recently we started experiencing an intermittent symptom which also occured several years ago, and was promptly, and easily, fixed in short order.
As I understand it this is a three phase, 240 V motor. It's easily capable of mixing 250# of dough in second speed. It looks like a giant mix master. The bowl is about four feet across and over two feet deep.
The symptom is that when we turn it on from the OFF position to the "1" position it makes a groaning sound that I associate with the motor not getting enough voltage to operate correctly, but still getting some power. We can readily replicate the sound by switching it to an "in-between" position between "1" and "2".
The motor performs flawlessly in second speed, and if you switch it down from second to first it is also fine, albeit the shift makes a considerable "clunk" -always has.
Last time we had the problem the tech swapped out some relays. They were readily accessible at the top of the mixer and it took maybe 45 minutes.
But an electrician that we've used before and is who is great with most stuff can't find anything in the relays and switching and says we have to pull the motor.
I didn't let him do it. Was I right to look for another opinion before doing a major motor repair? Or do I need to bit the bullet and get along without the beast for a week or two?