Contactor not latching

[westward10]

You should get continuity across them when it is latched closed.

 

[Tom256]

If it's a commercial mixer there will almost certainly be a safety interlock on the head, if it hinges or on the bowl guard if there is one.
The interlock will be in the control circuit for the contactor.
What you shouldn't be able to do is get your hands / fingers anywhere near any moving parts when it's running.

Indeed. there could be more than one safety interlock - example bowl height and then blender guard.

More information needed. When you don't know the answer - gather more data

Edit: just seen the post where the original poster mentions the difference is this machine has a stop / start.
Excuse this question to original poster, because I do not know anyone here, how familiar are you with DOL starters and auxillary contacts?

 

[westward10]

The one in question does have a stop/start function.

 

[Tom256]

The one in question does have a stop/start function.

I am getting confused following this one. I make a terrible passenger.

 

[brianmoooore]

Late to the party on this one as well, but if the original contactor had a NC auxiliary contact and the circuit is single phase, then one of the main contacts has been used as the aux to hold the contactor on, and as already said, the fault will probably be with a safety circuit external to the contactor.
I'd be getting a pen and some paper and tracing out the circuit of a) what I have with the faulty machine, and b) what it should be, from the adjacent, working, and hopefully, unmolested machine, if it is identical.

 

[westward10]

Good point they may well have put the control through a main contact.