Peristaltic Dosing Head

prusaprinters

<p>This is a peristaltic dosing head with a reversal dampener. It uses a 9:1 gear ratio and a nema 14 drive motor. This is a part of a series of experiments I am performing on liquid/farm bot/bio related devices.</p> <p>Videos: <a href="https://youtu.be/VUNKPKBcuh0">https://youtu.be/VUNKPKBcuh0</a></p> <p> <figure class="media"> <oembed url="https://youtu.be/e03CmF6zqBc"></oembed> </figure> </p> <p>Regular parts:</p> <p>I used pretty common parts for the majority of the device, M4 machine screws M5 Machine screw and square nuts for the rocker and 24 tooth pivots, ballpoint pen spring and a few M3 and M4 set-screws. The bearings are 5x 10x5x4, 4x 9x5x3, and 1x 7x3x3. The only trick is the sleeve bearing in the center of the base gear.</p> <p>Special parts:</p> <p>INA HK1010 Needle Roller Bearing https://www.amazon.com/gp/product/B006KT1FEU/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&amp;psc=1</p> <p>Nema 14 Stepper Motor 35mm https://www.amazon.com/gp/product/B07PQ12SDW/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&amp;psc=1</p> <p>Laboratory, Food &amp; Beverage and Vacuum Plastic Tubing, Clear, 1/16" ID x 1/8" https://www.amazon.com/gp/product/B00FW7UUTM/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&amp;psc=1</p> <p>Male luer with Lock Ring x 1/16" Hose Barb https://www.amazon.com/gp/product/B003NV7LFU/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&amp;psc=1</p> <p>30 Ga 1/4 Inch Blunt Tip Dispensing Needle with Luer Lock https://www.amazon.com/gp/product/B07VSDCRQG/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&amp;psc=1</p> Category: 3D Printer Extruders