SmartrapCore HK13 v1.0

thingiverse

Important Update - 22-08-2016 Please refrain from printing this design version as it has been found to contain incorrect belt paths, not set up perpendicularly. Check out the discussion on RepRap forum at: http://forums.reprap.org/read.php?344,563301,656013#msg-656013 for further details. Mistake was made attempting to maximize effective build volume within the confines of a standard cube shape without adequately considering essential guidelines for CoreXY setup. Error in judgment is acknowledged. Update - 10-07-2015 Zbottom_belt part replaced with an updated attachment mechanism for the stepper motor. Optical adjustments have been implemented to some design components. A revised assembled STL model is now available for viewing of this current design iteration. Update - 10-04-2015 An easy solution was discovered to integrate Optical Endstops and a couple of tie-wraps into the system for effective triggering. The part YSlide_Bot_Endstop has been modified to YSlide_Bot_X_Endstop_tiewrap, incorporating a slot for tie-wrap attachment. A new part YSlide_Bot_Y_Endstop_tiewrap has been added, replacing the YSlide_Top_Bot component, and also features a tie-wrapslot. Additionally, a new part Y_Endstop_holder was introduced to securely mount an Optical Endstop onto the right stepper motor. The outdated Endstop_Holder component was removed as it is no longer necessary in this design. A comprehensive Bill of Materials (BOM) with associated costs has been added. Original files are available at https://cad.onshape.com/documents/10a8f0214fa64912a989ba8d/w/774092f1242a47238ff32759/e/805452aa2f6e4f1a9012b2d3 for your reference (copy the file to make modifications). Several of you may already be familiar with my 8mm rod designs for SmartrapCore standard versions (found on Thingiverse). However, I've been adapting additional components to fit the experimental version that I'm working on. As a result of Smartfriendz's release of their ALU design and upgrading of the standard version to Onshape, I have taken advantage of these updates while also learning Onshape. This experimentation has led me to create a cheap and easy-to-assemble SmartrapCore variant using affordable 13mm square aluminum tubes from Hobby King. In trying to achieve larger build volume within a compact box, some modifications were made. Specifically, I adapted the standard components in the following ways: * Use of 8mm smooth rods * Implementation of copper self-lubricating bushings instead of standard bearings for reduced complexity and assembly requirements * Optimization of the X-axis width within the confines of 400mm alu square tubes * Elevating the X/Y axis slightly to accommodate a wider belt path Corner brackets were also designed for both top and bottom areas. Top corner brackets integrate steppers and XY_bearings_LR in one single component. By utilizing these customized components, I managed to secure a build plate of 250mm on the X-axis (and a 300mm Y-Slide between LR - minus 50mm from Head part) yielding an overall total build volume of 250x300x300.