Hotend Micrometer Height Ajuster for 20/20 & 20/40 Extrusion

thingiverse

This is a compact new version of my popular Anet A-8 Micrometer Height adjuster. Its been designed to be a carriage for 20/20 & 20/40 Aluminium extrusion, with 2 sets of holes for M5 bolts to mount the track wheels. It has a complete mounting system for an E3D-V6 hotend & fans, or you can design your own hot end mounts to screw onto the height adjusting slider. You will need some M3 & M5 Nuts & bolts, extruder track rollers & some 5/16 unf threaded rod & nuts & a spring. A piece of 8mm x 1mm fine pitch threaded rod (or 5/16 UNF can be used too) x 110mm long & 3 nuts are needed for the variable height adjuster. A thumb wheel with 10 graduated l markings is used to adjust the height. This gives a resolution of 0.1mm (0.004") per graduation & allows the head 12mm of variable height adjustment. A compression spring 25mm long x 10mm dia is used to take all backlash out of the design, as well stop any vibrations. Adjustments can be made while the machine is printing, so if a brim layer appears to be slightly too high or low, it can be adjusted while printing to get the first layer down perfect. The 2 dovetail wedge parts should be a neat, almost a little tight, so there is no movement or vibration between the 2 parts. If they are too tight, just pare some plastic away with a sharp knife until the fit is correct. M3 screws & captive nuts allow the bottom rollers to be adjusted to tension them into the track & provide zero lash. The photos are fairly self explanatory. The Parts are mounted on a modified Anet E10, but will fit any 20/20 & 20/40 extrusion on other machines. Purchasing pre-assembled track wheels is the best option, but if you want to buy bearings & print the wheels they are available to print here. There are plenty of E3D-V6 fan mounts & air nozzles to download to suit your needs. If you Find this useful please Like & post some finished photos. Added youtube vid https://www.youtube.com/watch?v=FZPFHl9lBNI