The Automats cock the shutter by using the friction from winding the film to turn a spool which is sort of rubberized.
That cocks the shutter as I said and maybe, not sure about this, this also has something to do with frame spacing.
My guess is that when the film slips, the shutter gets cocked later and frame spacing is out of line.
I've had a Automat VI disassembled once, that is one complicated mechanism. All I wanted to do was clean the mirror, but, as it turns out, you have to take the whole top off.
For that you have to remove the front covering and loosen screws deep inside the bowels of the thing. If you lose them, technically, you can shake them out, if that does not work, congratulations,
you're in for some serious disassembly.
Turning the knob on the side advances the film, that cocks the shutter which you can not cock when there is no film in it and the back door is closed.
Turning the knob cocks the shutter when the back door is opened. My point is that this whole mechanism has to be aligned properly. Maybe there is something out of whack?
You could try roughening up the outer pads on the cocking spool using some sand paper, maybe that helps.
But since the trouble started suddenly, my guess is that your repair person cocked up the cocking and advance mechanism.
Like I said, it is really complicated and I'm not too bad at repairing and figuring out how things work.
I like Flexarets but I gave up on mine. It only would work intermittently at some point so I sold it.
Is there a warranty on the repair?
Hope that helps to some extent.
