A useful tip for extruder motor current settings
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I thought this might be worth sharing. I've been running all sorts of tests on a dual heat zone hot end that I'm developing. One thing I needed to establish was the lowest possible temperature for one of the heat zones that I could reliable extrude 28 different filament types. This involves loading filament, then letting the hot end cool, then attempting to extrude starting at a low temperature and gradually increasing it. So effectively starting with a blocked hot end and gradually increasing the temperature until it is no longer blocked.
I didn't much fancy the idea of dealing with stripped filament and cleaning out the extruder multiple times, but fortunately discovered that by playing around with the extruder motor current I could get the motors to stall and skip when there is significant resistance, before the BMG extruders start to chew through the filament.
So (unless you have already thought of it) the tip is to consider setting your own extruder motor current such that should you be unfortunate to experience a hot end blockage, the motor will stall before the filament gets stripped. You'll still have to deal with the blockage but at least you won't have to strip and clean the extruder.
(.........and yes, I know I could fit filament monitors but my hot end has 6 inputs and my pension won't stretch far enough for me to buy 6 filament monitors).
