Bottom chassis for LGB switch drive 1201 & 1206

prusaprinters

<p>These are replacement parts for LGB switch drive 1201/12010 (electric drive) &amp; 1206/12060 (manual drive).</p><p>These are the bottom chassis of the drive mechanisms.<br>Other parts can be found here:<br>- <a href="https://www.printables.com/model/274269-lid-for-lgb-switch-drive-1201-1206">Switchdrive custom lid</a><br>- <a href="https://www.printables.com/model/274301-junction-box-for-garden-railway">Cable junction box</a></p><p>The reason to create these is that I bought a double slip diamond crossing kit from Modellbau-Werkstatt Bertram Heyn (<a href="https://www.modell-werkstatt.de/kreuzungs-weiche-r3-2-x-22-5">https://www.modell-werkstatt.de/kreuzungs-weiche-r3-2-x-22-5</a>). I want to motorize this with LGB electric switch drives. The problem is that the mounting points on the switch drive are made for LGB railroad sleepers/ties. The sleepers in the kit are shallower, so the mounting points don't fit.</p><p>I could either saw/file down the mounting points (as described in the kit's building instructions), or I could create a replacement bottom shell with shallower mounting points - and that is what I did.</p><p>The SCAD file has the code to create the bottom shells for both 1201 and 1206. Each has an optional parameter to define a custom height for the mounting points. 1206 has also a seconds optional parameter to give it extra height - this is needed in this case because the drive rod of normal 1206 is too low for the double slip.</p><p>The SCAD file references the library <i>af-basics.scad</i> which can be found here: <a href="https://www.printables.com/model/175914-openscad-library-for-more-basic-shapes">https://www.printables.com/model/175914-openscad-library-for-more-basic-shapes</a></p><p>The STL files are:</p><ul><li>lgb_switchdrive1201bottom.stl - normal bottom shell for 1201</li><li>lgb_switchdrive1201bottom_flat.stl - bottom shell for 1201 with shallower mounting points for the double slip</li><li>lgb_switchdrive1206bottom.stl - normal bottom shell for 1206</li><li>lgb_switchdrive1206bottom_flat+1.stl - bottom shell for 1206 with shallower mounting points and 1mm extra height for the double slip</li></ul><p>The photos show how the interior mechanics, lid and screws of the original LGB 1201 and 1206 are simple put into &amp; onto the printed parts.</p><p>The parts are printed in grey Prusament PETG with 0.3mm layer height and 3 perimeters. I lowered the nozzle temp to 220°C after the first layer to reduce stringing. I advice to NOT use PLA because it might (will) deform in direct sunlight.</p><p><strong>Update 2022-09-27:</strong></p><p>I increased the clearance for the magnetic core by 0.4mm length-wise to accommodate older style drive mechanisms.<br>The SCAD file and both STLs for the 1201 bottom chassis are updated.</p>