{"product_id":"rack-pinion-robotic-gripper-jaw","title":"Rack \u0026 Pinion Robotic Gripper Jaw","description":"\u003cdiv\u003e\n\u003ch1 class=\"thing-component-header summary summary\"\u003eSummary\u003c\/h1\u003e\n\u003cdiv\u003e\n\u003cp\u003eServo Controlled Robotic Gripper using rack \u0026amp; pinion drive for parallel jaw movement\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/youtu.be\/Qfd0ikdnAsg\" rel=\"nofollow\"\u003ehttps:\/\/youtu.be\/Qfd0ikdnAsg\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a robotic gripper\/jaw that uses a low-cost Tower Pro MG996R servo.\u003c\/p\u003e\n\u003cp\u003eAs opposed to some grippers that use a lever action, this directly drives both jaws with a rack and pinion action.\u003c\/p\u003e\n\u003cp\u003eIt therefore has slightly more grip than traditional lever grippers and the jaw movement is totally parallel.\u003c\/p\u003e\n\u003cp\u003eIt could be easily modified to fit into a robotic arm.\u003c\/p\u003e\n\u003cp\u003eIt requires:\u003cbr\u003e1pcs Tower Pro MG 996R servo motor (approx price UK £5 \/ US $10)\u003cbr\u003eM3x15mm Screws (4 pcs)\u003cbr\u003eM3x10mm Screws (4 pcs)\u003cbr\u003eM3 nuts (8 pcs)\u003c\/p\u003e\n\u003cp\u003eTo drive it, I used a servo motor test board and a USB phone charger (2.5A) But you can also use an Arduino.\u003c\/p\u003e\n\u003cp\u003eServo tester board:\u003cbr\u003e\u003ca href=\"https:\/\/www.banggood.com\/Servo-Tester-Third-Gear-Switch-With-Indicator-Light-4_2V-To-6_0v-p-1079862.html\" rel=\"nofollow\"\u003ehttps:\/\/www.banggood.com\/Servo-Tester-Third-Gear-Switch-With-Indicator-Light-4_2V-To-6_0v-p-1079862.html\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eOct 2018 - I've added an alternative JAW that has a wider opening of about 70mm, but obviously only closes to about 22mm. This was for a request to enable the jaw to operate a Rubik's cube of about 57mm Square. Please note that I haven't tested this, so hopefully it'll print and function correctly.\u003c\/p\u003e\n\u003cp\u003eMay 2019 - It's been reported that the pinion doesn't have teeth to engage with the motor spindle teeth and just spins on the motor spindle. I checked my version here and the pinion on the motor spindle is rock solid. It shouldn't need teeth and as the teeth on the motor spindle are so small, I doubt whether most low-cost consumer 3D printers could print teeth that would interlock.\u003c\/p\u003e\n\u003cp\u003eThe problem is probably because I forgot to mention that the pinion has two different sides. On one side the hole recess is deeper and smaller in diameter to tightly fit onto the motor spindle. On the other side, the recess is shallower and larger to accommodate an M3 screw head. So you need to make sure the tighter deep side is pushed onto the spindle motor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch1 class=\"thing-component-header settings print-settings\"\u003ePrint Settings\u003c\/h1\u003e\n\u003cp class=\"detail-setting printer brand\"\u003e\u003cstrong\u003ePrinter Brand: \u003c\/strong\u003e                         \u003c\/p\u003e\n\u003cdiv\u003e\u003cp\u003ePrusa\u003c\/p\u003e\u003c\/div\u003e                                    \u003cpre\u003e\u003ccode\u003e                                            \u003cp class=\"detail-setting printer\"\u003e\u003cstrong\u003ePrinter: \u003c\/strong\u003e                     \u003c\/p\u003e\n\u003cdiv\u003e\u003cp\u003ei3 MK2S\u003c\/p\u003e\u003c\/div\u003e\u003c\/code\u003e\u003c\/pre\u003e\n\u003cp\u003e\u003c\/p\u003e                                    \u003cp class=\"detail-setting rafts\"\u003e\u003cstrong\u003eRafts: \u003c\/strong\u003e                         \u003c\/p\u003e\n\u003cdiv\u003e\u003cp\u003eDoesn't Matter\u003c\/p\u003e\u003c\/div\u003e                                    \u003cpre\u003e\u003ccode\u003e                                            \u003cp class=\"detail-setting supports\"\u003e\u003cstrong\u003eSupports: \u003c\/strong\u003e                     \u003c\/p\u003e\n\u003cdiv\u003e\u003cp\u003eNo\u003c\/p\u003e\u003c\/div\u003e\u003c\/code\u003e\u003c\/pre\u003e\n\u003cp\u003e\u003c\/p\u003e                                    \u003cp class=\"detail-setting resolution\"\u003e\u003cstrong\u003eResolution: \u003c\/strong\u003e                         \u003c\/p\u003e\n\u003cdiv\u003e\u003cp\u003e200\u003c\/p\u003e\u003c\/div\u003e                                    \u003cpre\u003e\u003ccode\u003e                                            \u003cp class=\"detail-setting infill\"\u003e\u003cstrong\u003eInfill: \u003c\/strong\u003e                     \u003c\/p\u003e\n\u003cdiv\u003e\u003cp\u003e20%\u003c\/p\u003e\u003c\/div\u003e\u003c\/code\u003e\u003c\/pre\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003ch1 class=\"thing-component-header tips post-printing\"\u003ePost-Printing\u003c\/h1\u003e\n\u003cp class=\"detail-title\"\u003e\u003cstrong\u003eSome Filing\u003c\/strong\u003e\u003c\/p\u003e\n\u003cpre\u003e\u003ccode\u003e            \u003cdiv\u003e\u003cp\u003eYou may need to file or remove excess plastic inside where the nuts go\u003c\/p\u003e\u003c\/div\u003e\u003c\/code\u003e\u003c\/pre\u003e\n\u003ch1 class=\"thing-component-header design how-i-designed-this\"\u003eHow I Designed This\u003c\/h1\u003e\n\u003cp class=\"detail-title\"\u003e\u003cstrong\u003eFusion 360\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eDesign by PapaBravo on MakerWorld (license: BY).\u003c\/p\u003e","brand":"Mymadmanlab","offers":[{"title":"Default Title","offer_id":67383282696496,"sku":null,"price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0987\/0809\/5280\/files\/0_cfd79245-d6b6-4de5-a266-4a1741dfa5ea.jpg?v=1784496191","url":"https:\/\/mymadmanlab.com\/products\/rack-pinion-robotic-gripper-jaw","provider":"Mymadmanlab.com","version":"1.0","type":"link"}