Diabase crash detector

This thing can be used to mount the heatbed of the Diabase H-series on springs and to mount switches underneath the printbed to detect when a nozzle has crashed into the bed. This is usefull since the diabase H-series is so powerfull it will bend it's extruders before the motors stall, even when software stall detection (M915) is enabled. Note that this solution probably only works when you are not using the machine for milling and that you will loose the capability to easily take of the heatbed.

For this solution the heatbed is mounted on compression springs of 19x13x1.2mm (7 turns, ends grounded flat). Underneath each corner a Cherry DB1C-C1RB microswitch is placed using a 3D printed mounting bracket. The springs are pre-tensioned by screwing a bolds into each of the pins of the heatbed. To keep the heatbed connector connected, the pcb with the heatbed connector is also mounted on a couple of springs salvaged from some pens and some m3x10 bolts.

To make sure the heatbed can't