Serienproduktion d139|17
First test … and the wrong side was up - so it was printed on a suspended membrane instead of the peltier element inside. That normaly should allow fast heating and cooling (the small area 50×50mm heats up in 3-5 seconds to 100°C) a small Motor will be added next.
but you need to coll the other side of the peltier otherwise it will just heat and burn itself . membrane will cause high prints to fail and self detach *kapton tape is not the best solution here ,
@Piotr_Sitko you should not run the peltier without temp controle and only 3seconds on full power to heat up … after that it needs very little. And Yes very likely the membrane will cause the issues you said but as i said it was an accident and the iteressting part is that you can print on the membrane without a heatbed - as the membrane has so little heat capacity. However if you see my second video/post you see that printing on the right side is working pretty well. What did you mean with “self detach” and what would you use?
I meant it you try to print something tall and small the force applied by the moving head will be great enough to detach print from the platform. Maybe I am overthinking , some people do this http://www.thingiverse.com/thing:20383 But I think that you need to add spring loaded tension mechanism to make sure that the foil(kaptontape) will not move horizontally to left and right when printing , if you want to make precise prints
@Piotr_Sitko you see the black stripes - thats a special neoprene sticks like glue but is no adhesive. I am just thinking about building an XY unit with 2 sheets and two level of such rollers…
good luck ! : ) Maybe if you have board that supports g code commands like external cooling fan you can hook it up to motherboard and have it run after each print , you may want to use voltage regulator after that mosfet to reduce voltage going to your motor. That way you don’t need any external power supply and it will be automatic. You can also connect yourself with comparator to led state so when the head comes back to home position and both leds are lit up it will trigger your part. Or maybe you have a different idea , just trying to help 
hope you will not give up and make it work great!
its a 12v motor, but i ll change that for a stepper. • the other Idea is to use a mouse sensor to track the movement of the belt/platform - a 4000dpi mouse should make 1µm possible.
if you are going to use stepper motor you can count the steps like 3d printer does