RatRig VCore 3 Tool Changer

prusaprinters

<h3><strong>About</strong></h3><p>This is a tool changer modification for the RatRig VCore 3 printer that utilises an E3D style coupling.</p><p><strong>Belts</strong></p><p>This modifications is designed with the intention of being used on an VCore 3 with the so called “OpenFront” modifications where an alternative location exists for tensioning the printer belts.</p><p><strong>Z-Probe</strong></p><p>This modification is designed with the intention of using the z-probe mounts (or similar) used with the EVA system and specifically a SuperPINDA.  I will possibly design an alternative mount using a SPDT endstop type switch.</p><p><strong>X-Endstop</strong></p><p>This modification uses the blank EVA MGN12 top and therefore EVA X-endstop mounts can be reused.</p><p><strong>Y-Endstop</strong></p><p>This modification moves the Y-endstop to the front of the frame - once tested I will attach an STL.</p><p> </p><h3>Demo</h3><figure class="media"><oembed url="https://www.youtube.com/watch?v=sRe3pZT9Fkg"></oembed></figure><figure class="media"><oembed url="https://youtu.be/8Z3bdzcItSQ"></oembed></figure><figure class="image"><img src="https://media.printables.com/media/prints/137147/rich_content/a9581b52-f718-4764-a99a-2c19b2874d9a/20220331_135718.webp#%7B%22uuid%22%3A%228aa14947-0337-4687-9e0e-93baa7d76f14%22%2C%22w%22%3A1280%2C%22h%22%3A960%7D"></figure><h3>Bill of Materials</h3><h4><strong>Head</strong></h4><figure class="table"><table><thead><tr><th>Part</th><th>Quantity</th><th>Comment</th></tr></thead><tbody><tr><td>TC - Head - Front.stl</td><td>1</td><td>6 perimeters / top / bottom</td></tr><tr><td>TC - Head - Top.stl</td><td>1</td><td>4 perimeters / top / bottom</td></tr><tr><td>TC - Head - Bottom - Small.stl</td><td>1</td><td>4 perimeters / top / bottom</td></tr><tr><td>TC - Head - Back.stl</td><td>1</td><td>6 perimeters / top / bottom</td></tr><tr><td>TC - Head - Belt Grabber.stl</td><td>4</td><td>4 perimeters / top / bottom</td></tr><tr><td>10mm x 4mm Dowel Pin</td><td>6</td><td> </td></tr><tr><td>SF695ZZ Bearing</td><td>1</td><td> </td></tr><tr><td>4mm E-Clip</td><td>1</td><td> </td></tr><tr><td>12mm x 3mm Dowel Pin</td><td>1</td><td> </td></tr><tr><td>M3x3mm Grub Screw</td><td>1</td><td> </td></tr><tr><td>Tool Coupler Shaft</td><td>1</td><td>From E3D</td></tr><tr><td>M3x6 Socket Head Screw</td><td>1</td><td> </td></tr><tr><td>MR105RS Bearing</td><td>1</td><td> </td></tr><tr><td>F5-12M Thrust Bearing</td><td>1</td><td> </td></tr><tr><td>15mm x 1mm Spring</td><td>1</td><td> </td></tr><tr><td>40T Mod 0.5 Gear</td><td>1</td><td>From E3D</td></tr><tr><td>M3 Washer</td><td>1</td><td> </td></tr><tr><td>M3x10 Socket Head Screw</td><td>1</td><td> </td></tr><tr><td>20T Mod 0.5 Gear</td><td>1</td><td>From E3D</td></tr><tr><td>M3x50 Socket Head Screw</td><td>4</td><td> </td></tr><tr><td>Stepper Motor</td><td>1</td><td>From E3D</td></tr><tr><td>M3x8 Socket Head Screw</td><td>13</td><td> </td></tr><tr><td>M2.5x8 Socket Head Screw</td><td>2</td><td> </td></tr><tr><td>Omron D2HW-C201H Switch</td><td>1</td><td>Optional tool detect switch</td></tr><tr><td>M3xD4.6mmxL5.0mm Heat Insert</td><td>3</td><td> </td></tr><tr><td>M3 Full Hex Nut</td><td>12</td><td> </td></tr><tr><td>M3x6mm Grub Screw</td><td>2</td><td> </td></tr><tr><td colspan="3"><strong>Motor Brace Options</strong></td></tr><tr><td colspan="3"><strong>Small</strong> - As designed by E3D</td></tr><tr><td>TC - Head - Motor Brace - Small.stl</td><td>1</td><td>4 perimeters / top / bottom</td></tr><tr><td>16mm Standoff</td><td>2</td><td>15mm standoff if using non-E3D stepper</td></tr><tr><td>M3x8 Socket Head Screw</td><td>2</td><td> </td></tr><tr><td>M3xD4.6mmxL5.0mm Heat Insert</td><td>2</td><td> </td></tr><tr><td colspan="3"><strong>Large</strong> - A larger version of the E3D design with 4 standoffs for more support</td></tr><tr><td>TC - Head - Motor Brace - Large.stl</td><td>1</td><td>4 perimeters / top / bottom</td></tr><tr><td>16mm Standoff</td><td>4</td><td>15mm standoff if using non-E3D stepper</td></tr><tr><td>M3x8 Socket Head Screw</td><td>4</td><td> </td></tr><tr><td>M3xD4.6mmxL5.0mm Heat Insert</td><td>4</td><td> </td></tr><tr><td colspan="3"><strong>Switches</strong> - A 4 standoff version with 2 SPDT switches for lock/unlock detection</td></tr><tr><td>TC - Head - Motor Brace - Switches.stl</td><td>1</td><td>4 perimeters / top / bottom</td></tr><tr><td>TC - Head - Cam.stl</td><td>1</td><td>4 perimeters / top / bottom</td></tr><tr><td>16mm Standoff</td><td>4</td><td>15mm standoff if using non-E3D stepper</td></tr><tr><td>M3x8 Socket Head Screw</td><td>6</td><td> </td></tr><tr><td>M3xD4.6mmxL5.0mm Heat Insert</td><td>6</td><td> </td></tr><tr><td>Omron D2HW-C261H Switch</td><td>2</td><td> </td></tr></tbody></table></figure><p><strong>Stepper Motor: </strong>This build assumes the usage of the motor although I have trialled and used a 24BYJ-48 (available from Mouser and RS Components) which seems to work well too. I can provide alternative parts for this if required. </p><p><strong>Spring:</strong> I purchased a 20mm spring initially which was too long and I cut it down, the 10mm I have is slightly too short so would recommend a 15mm or 20mm and cut if required.</p><h4> </h4><h4>Dock</h4><p>Note: This is for a single tool dock.</p><figure class="table"><table><thead><tr><th>Part</th><th>Quantity</th><th>Comment</th></tr></thead><tbody><tr><td>TC - Dock - Stand.stl</td><td>1</td><td>4 Perimeters / top /bottom</td></tr><tr><td>TC - Dock - Receiver.stl</td><td>1</td><td>4 Perimeters / top / bottom</td></tr><tr><td>M6x12 Socket Head Screw</td><td>2</td><td> </td></tr><tr><td>M6 3030 T-Nut</td><td>2</td><td> </td></tr><tr><td>M3xD4.6mmxL5.0mm Heat Insert</td><td>3</td><td> </td></tr><tr><td>M4x45 Locating Dowel Pin</td><td>2</td><td>Can be longer</td></tr><tr><td>M3x10 Socket Head Screw</td><td>1</td><td> </td></tr><tr><td>M3x12 Socket Head Screw</td><td>2</td><td> </td></tr><tr><td>M3x6mm Grub Screw</td><td>1</td><td> </td></tr><tr><td>6mmx3mm Neodymium Magnet</td><td>1</td><td> </td></tr></tbody></table></figure><h4> </h4><h4>Tools</h4><p><strong>Tool Face:</strong> An additional tool face will be provided for use with E3D metal tool plates.</p><p><strong>Helical Lock Ramp:</strong> This can be 3D printed (TC - Tool - Ramp.stl) and I would recommend 0.1mm layer height or less.</p><p> </p><h5>E3D Revo Micro / LGX Lite</h5><figure class="table"><table><thead><tr><th>Part</th><th>Quantity</th><th>Comment</th></tr></thead><tbody><tr><td>TC - Tool - Face.stl</td><td>1</td><td>6 Perimeters / top / bottom</td></tr><tr><td>TC - Tool - LGX Lite Mount.stl</td><td>1</td><td>6 Perimeters / top / bottom</td></tr><tr><td>TC - Tool - Revo Mount.stl</td><td>1</td><td>6 Perimeters / top / bottom</td></tr><tr><td>TC - Tool - 5010 Fan Mount.stl</td><td>1</td><td>6 Perimeters / top / bottom</td></tr><tr><td>TC - Tool - Revo Fan Duct.stl</td><td>1</td><td>4 Perimeters / top / bottom</td></tr><tr><td>LGX Lite</td><td>1</td><td> </td></tr><tr><td>E3D Revo Micro</td><td>1</td><td> </td></tr><tr><td>12mm M3 Steel Ball </td><td>3</td><td> </td></tr><tr><td>Helical Lock Ramp</td><td>1</td><td>From E3D</td></tr><tr><td>M3xD4.6mmxL5.0mm Heat Insert</td><td>15</td><td> </td></tr><tr><td>M3x6mm Grub Screw</td><td>1</td><td> </td></tr><tr><td>6mmx3mm Neodymium Magnet</td><td>1</td><td> </td></tr><tr><td>Bowden Tube</td><td>1</td><td> </td></tr><tr><td>M3x10 Countersunk Socket Head Screw</td><td>5</td><td> </td></tr><tr><td>M3x6 Socket Head Screw</td><td>3</td><td> </td></tr><tr><td>M3x16 Socket Head Screw</td><td>4</td><td> </td></tr></tbody></table></figure><p> </p><h5>Phaetus Dragon HF / LGX Lite</h5><figure class="table"><table><thead><tr><th>Part</th><th>Quantity</th><th>Comment</th></tr></thead><tbody><tr><td>TC - Tool - Face.stl</td><td>1</td><td>6 Perimeters / top / bottom</td></tr><tr><td>TC - Tool - LGX Lite Mount.stl</td><td>1</td><td>6 Perimeters / top / bottom</td></tr><tr><td>TC - Tool - Dragon Mount.stl</td><td>1</td><td>6 Perimeters / top / bottom</td></tr><tr><td>TC - Tool - 5010 Fan Mount.stl</td><td>1</td><td>6 Perimeters / top / bottom</td></tr><tr><td>LGX Lite</td><td>1</td><td> </td></tr><tr><td>Phaetus Dragon</td><td>1</td><td> </td></tr><tr><td>3010 Fan w/ Duct</td><td>1</td><td> </td></tr><tr><td>12mm M3 Steel Ball </td><td>3</td><td> </td></tr><tr><td>Helical Lock Ramp</td><td>1</td><td>From E3D</td></tr><tr><td>M3xD4.6mmxL5.0mm Heat Insert</td><td>15</td><td> </td></tr><tr><td>M3x6mm Grub Screw</td><td>1</td><td> </td></tr><tr><td>6mmx3mm Neodymium Magnet</td><td>1</td><td> </td></tr><tr><td>Bowden Tube</td><td>1</td><td> </td></tr><tr><td>M3x10 Countersunk Socket Head Screw</td><td>5</td><td> </td></tr><tr><td>M3x6 Socket Head Screw</td><td>3</td><td> </td></tr><tr><td>M3x16 Socket Head Screw</td><td>4</td><td> </td></tr></tbody></table></figure><h3> </h3><h3>Software Configuration</h3><p>The configuration here presumes the usage of Klipper - Duet is not be covered.</p><h4>Plugin Installation</h4><p>Install this excellent Klipper plugin by Andrei Ignat - <a href="https://github.com/TypQxQ/Klipper_ToolChanger">https://github.com/TypQxQ/Klipper_ToolChanger</a></p><h4>Klipper Configuration</h4><p>I have uploaded my RatOS configuration folder to the following repository:</p><p><a href="https://github.com/psyvision/vcore3-configuration">https://github.com/psyvision/vcore3-configuration</a></p><p>This is mostly typical RatOS configuration and the tool changer configuration is in the “additions” folder:</p><figure class="table"><table><thead><tr><th>File / Folder</th><th>Purpose</th></tr></thead><tbody><tr><td>btt-octopus-11/*</td><td>Files providing configuration for a BTT Octopus 1.1 as a tool board</td></tr><tr><td>board.cfg</td><td>Pin definitions for the coupler and each individual tool (extruder, tmc etc.)</td></tr><tr><td>toolchanger.cfg</td><td>ToolChanger Klipper plugin configuration and macros to handle tool changes</td></tr><tr><td><p>speed-limits-performance.cfg</p><p>steppers.cfg</p><p>tmc2209-performance.cfg</p></td><td>These files provide the same functionality/configuration as the original RatOS configuration except removing the extruder configuration</td></tr></tbody></table></figure><p> </p><h3>Version History</h3><figure class="table"><table><thead><tr><th>Version</th><th>Date</th><th>Comment</th></tr></thead><tbody><tr><td>v0.6</td><td>08/04/2022</td><td>Updated TC - Head - Back files</td></tr><tr><td>v0.5</td><td>01/04/2022</td><td><p>Revised dock with cable bracing</p><p>Partial STEP file publication</p></td></tr><tr><td>v0.4</td><td>31/03/2022</td><td><p>Improved dock cable management</p><p>Mirrored fan/cable on LGX Lite mount</p><p>Software configuration update</p><p>Add head bottom with ADXL mounting</p></td></tr><tr><td>v0.3</td><td>10/03/2022</td><td><p>Update dock files</p><p>Added carriage motor brace options</p></td></tr><tr><td>v0.2</td><td>25/02/2022</td><td>Updated after initial trials</td></tr><tr><td>v0.1</td><td>21/02/2022</td><td>Initial beta release</td></tr></tbody></table></figure><h3> </h3><h3>Attribution</h3><p>This modification would not be possible without designs from:</p><ul><li>E3D Online (Tool changer)</li><li>Pawel Kucmus (EVA platform)</li><li>Joshua Vasquez (Jubilee 3D)</li><li>Andrei Ignat (Klipper Toolchanger plugin)</li></ul>

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