Compact Tourbillon mechanism

prusaprinters

<p>(Original Thingiverse link: https://www.thingiverse.com/thing:4226922)</p><p>Small and compact windup tourbillon design based on the Blancpain Tourbillon Carrousel, less than a 100mm at its widest. I had to go through several design iterations and prototypes before i landed on a result i was happy with posting online.<br>It lasts about 3 minutes on 1 wind</p><figure class="media"><oembed url="https://www.youtube.com/watch?v=zj2x6IsGiTs"></oembed></figure><p>Note: Mainspring must not be printed in PLA. PETG or ABS is preferred.<br>Parts may need to be reoriented before printing.</p><p>Tools and parts required:</p><p>A printer well calibrated for accuracy<br>0.25MM nozzle<br>Needle or diamond files<br>Cutting broaches, 1.5 to 3mm in size ( [Example](https://www.amazon.com/Cutting-broach-set-1-2-3-0mm/dp/B003LS2H7C/ref=sr_1_112?qid=1584415456&amp;sr=8-112&amp;srs=8181165011) )<br>1x 688(ZZ) bearing (8x16x5)<br>2x MR63ZZ bearing (6x3x2.5)<br>5x M3 x 4MM screws (correct length is critical), preferably din 98 cheese head screws<br>4x M2 screws, max 8MM length<br>2MM metal rod<br>3MM metal rod<br>(optional) 1.6M x 4MM screw</p><p>Assembly:</p><p>Escapement:<br>Cut 2 pieces of the 2MM rod to a length of 17.5MM and 10.5MM (+0 -1 tolerance).<br>Press the 17.5MM rod into the escape wheel along with a bearing spacer.<br>Press the 10.5MM rod into the escape pallet along with a bearing spacer.<br>This should be an interference fit, use cutting broach if necessary.<br>Make sure that the metal rod sticks out by 2-2.5mm on both sides.</p><p>Frame:<br>Use cutting broach to enlarge the 2MM holes for the escapement on the mid and bottom frame til a running fit is achieved.<br>Press the 6MM bearings into their respective holes in the tourbillon frame.<br>Press the 16MM bearing into the stud on the bottom of the frame.<br>fitting a 1.6M screw to the regulator is optional, a light press fit with the hairspring stud works just as well.</p><p>Balance Wheel:<br>cut a piece of 3MM rod to a length of 22MM and press it into the balance wheel along with the balance wheel arbor/staff.<br>It is critical that the small notches on the the wheel and arbor/staff are lined up.<img class="image_resized" style="width:100%;" src="https://media.printables.com/media/prints/179150/rich_content/9d197027-63c0-4190-a113-51dc2f231a67/large_display_skjermbilde3.png#%7B%22uuid%22%3A%224c3d7ee4-b94f-4d24-a65c-11f820e052ff%22%2C%22w%22%3A1024%2C%22h%22%3A654%7D"><br>fit the hairspring to the small hexagonal part on the balance wheel, making sure the cutout. and notch are lined up to ensure orientation.</p><figure class="image image_resized" style="width:100%;"><img src="https://media.printables.com/media/prints/179150/rich_content/9815b4d6-feac-4de9-a3cb-8e7d151f5b75/large_display_skjermbilde4.png#%7B%22uuid%22%3A%22ec37478d-18f9-4a8f-be7d-011858498beb%22%2C%22w%22%3A1024%2C%22h%22%3A694%7D"></figure><p>Rejoice! the difficult part of the assembly is now over! and with it i will leave the rest of the assembly up to you.</p>