DemonDeltaMicro - Simplest reprap delta frame to date.

See it working here: https://youtu.be/vKAmmksFpJ4 and here https://youtu.be/mn-dIP0MK7c 30-12-17 IMPORTANT SAFETY TIP - I HAVE NOW ON TWO OCCASIONS HAD THIS PRINTER TIP OVER, ITS TALL AND NARROW. PLEASE SECURE THE PRINTER TO THE BATTERY UNIT WITH THE SCREWS (IF USING LIPO BATTERY). PLEASE ALSO CONSIDER SOME OTHER FORM OF RESTRAINT. IT SEEMS TO BE THE WEIGHT OF THE SPOOL WHEN FULL ON TOP. I WILL DESIGN A NEW SPOOL HOLDER. Update 15-09-17 - DemonDeltaMicro goes fully portable! Okay, so can you make a portable 3D printer which runs off lipo batteries - yes. I have made an add-on module for this printer which allows truly wireless, portable use. https://www.thingiverse.com/thing:2536426 I have also added a modified base for the printer which allows you to attach the battery module. Update 22-07-17, so the Micro has finally got a z-probe, please see https://www.thingiverse.com/thing:2446460 now calibrating to 0.07mm deviation using RC's marlin and the Precision Piezo, Z-probe system. Update 11-07-17 Decided to try a new heater for the bed. Keenovo (eBay and Aliexpress) offer custom heated bed this size for only £25 delivered to UK. So I opted for a 100mm diameter silicone heater at 50w 12v (4 amps) so it should heat up quicker, be neater and fit better than the square (off the peg) heater that I had before. The quality of these units is excellent, and you can specify the thermistor/pt100 sensor etc.. you want when it is made. Also moved on to using LV8729 drivers which IMO are very good, they are much quieter than A4988's and although they are specc'd for 1.5A max this is ample for a micro/small printer. Unlike TMC 2100's they are stable, and run cool. Update 24-04-17 Gone back to the A4988's as the TMC's were just too difficult to tune, working well one minute and layer shifts the next. Also changed the unbelievably noisy fan on the mini hotend for a Sunon Maglev 25mm fan, which is much quieter. Update 07-04-2017 - recently swapped my A4988 d