Cetus 3D Z-axis shock absorber

thingiverse

Additional hardware required: M4 screw X 5-10mm long Tension coil spring (mine comes from a used laser printer cartridge) Double-sided tape (3M VHB tape recommended) How it works: When the power on the Cetus 3D printer is turned off, the horizontal arm will drop. When it reaches the arm of the shock absorber, the spring will extend to reduce the shock and bring the arm to a stop before it touches the print bed. During actual printing, the stepper motor is able to overcome the spring tension and reach the print bed so no user action is required whatsoever to operate the shock absorber. It is recommended to place the arm of the shock absorber at a point below the stepper motor (move along the X-direction) such that the nozzle touches the print bed just before the arm reaches the bottom (adjust along the Y-direction). The base of the shock absorber is stuck to the metal casing of the printer with strong double-sided tape. P.S. A double spring version is included if the spring you can find do not have enough tension. For a video showing the shock absorber in action, goto https://youtu.be/I4b1CjHHJ4g Printing recommendation: As the hooks on the base and arms are going to take a lot of shock from the springs, it is recommended to print with as high an infill as you have time for. A 0.2mm layer height is good enough and both the base and the arm should be printed lying on its flat side. CAUTION: Remove the print nozzle when testing to find the right spring with enough tension. No part of the print head should touch the print bed when the horizontal arm is dropped and stopped by the shock absorber. For the extended Z-axis machines, the double spring version is recommended.