This is replacement part for the [Robotgeek Gripper](http://www.trossenrobotics.com/robotgeek-gripper) to allow for easier collection of pennies for the 2017 division C Science Olympiad event, Robot Arm. It should be fully rules complaint but check dimensions before using this design.
The Robotgeek Gripper - Penny Gripper requires no modification to the Robotgeek Gripper and is a drop in replacement for existing parts. In addition this gripper mod should gives the Robotgeek Gripper the ability to grab a stack of pennies up to 36 mm in heights. The griper should be able to grab other things then pennies but pennies is what it was designed to deal with. This included two variants RGS Adapter that will allow for a slightly out of tune printer to create a functional part.
Design Project: Project Apollo
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Printed Parts needed:
2x RGS Adapter 20.95 mm (or RGS Adapter 21.05 mm)
2x Gripper Mid 36mm
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Hardware Needed:
2x M3x8 Bolts https://www.amazon.com/BoNaYuanDa-120pcs-Socket-Screws-M3x10mm/dp/B01MQJPAP0/
2x M3 nuts https://www.amazon.com/gp/product/B000NBIH92/
Some [3ALink Sound Dampening Mat](http://www.xoxide.com/sounabmat.html)
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Info on Installing:
1. Feed the M3x8 blots through the hole on the concave side of the Gripper Mid 36mm and push the bolt head into the part until it is flush with he concave side of the part, see picture above.
2. Feed the M3x8 bolt with the Gripper Mid 36mm on it through the hole on the RGS Adapter 20.95 mm (or RGS Adapter 21.05 mm) so that the large flat parts of each part are against each other and the end of the M3x8 bolt is in the concave section of the RGS Adapter 20.95 mm (or RGS Adapter 21.05 mm), see picture above.
3. Install a M3 nuts onto the end of the M3x8 bolt, see picture above. Use the nut to lock the position of the grippers.
4. Install foam to the concave side of the Gripper Mid 36mm as needed.
5. This completed part replace the Fingertip Front Plastic Plate and the two Fingertip Side Plastic Plate in the assembly instructions of the Robotgeek Gripper, Step 15 to 17.
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Info on the Design:
This design is my attempt to take the [OWI Penny Gripper](http://www.thingiverse.com/thing:2069843) to the Robotgeek Snapper Arm with the [Robotgeek Gripper](http://www.trossenrobotics.com/robotgeek-gripper). The design required making the Gripper Mid taller to get past the larger frame of the Robotgeek Gripper. This design does offer an advantage over the OWI design: the grippers can be locked to any angle for operation.
The reason there are two variants of the RGS adapter is I did the design these parts without access to the fully assembled griper. It has been tested by my friend with the bot but I only had the Fingertip Front Plastic Plate and the two Fingertip Side Plastic Plate to work off of. So I have included both in case for some reason your printer is not creating a perfect 1 to 1 recreation of the main part. I would recommend printing the RGS Adapter 20.95 mm before the 21.05 mm version.
Note: At time of upload, the design has not been tested in competition and has no guarantee of performance.
cordovalabs
