Raising the TOM ceiling 50mm

thingiverse

Inspired by barrychuck's Tall TOM (http://www.thingiverse.com/thing:7063) and Zydac Cup Cake Extenders (http://www.thingiverse.com/thing:4716), I replicated my TOM with a 50mm raised ceiling. The longer screw stepper was sourced from Kysan directly (https://store.kysanelectronics.com/servlet/-strse-69450/17HD011-dsh-200N/Detail) and added a few micro servos to meet the $100 minimum order requirement. Unfortunately, the stepper was broken upon arrival; there was no resistance between pin 3 and 6, which should be 0.5 Ohm between pins 1 and 4. I replaced the longer leadscrew axle with the original TOM's one to complete the project. Kysan was contacted, and they agreed to send a replacement stepper with a 200mm leadscrew without requiring the faulty one back - excellent customer service! The new stepper arrived from Beijing via EMS in just four days. The 3/8" rod came from McMaster-Carr (http://www.mcmaster.com/) with part number 88915K213, a 36" stainless steel rod. I cut two new rods after raising the top to ensure proper fit due to potential variations in the extenders. The Zydac Cup Cake Extenders are designed for TOMs, explaining the difference between front and back. The backs also have markings for self-tapping screws to secure the Z-end stop. Additional parts required include six M3 16mm screws and nuts from the original stash, two countersunk M3 16mm for extender connection, and two self-tapping screws for the Z endstop. To assemble, print four sides, two fronts, and two backs without rafts, with extra shells for durability. Remove supports to insert pins into slots, then detach the stepper and Z-rods from the Z-stage. Disconnect the Z-axis end stop, which will be installed in the right back extender later. Install extenders in order (sides and front first, back last), securing the Z endstop before installing the extender. Be cautious with wiring; you may need to lengthen it for the new Z-height. Cut and install new Z-rods, measuring carefully, and reassemble the stepper without using the new brass nut - it's identical to the TOM's. If your ABP is low enough, leave the cork out; otherwise, it could be 2mm shorter. Adjust wiring connections and enjoy your 50mm taller printer!