![]() ![]() Let's start assembling the main base following the steps :Ī - Put in position an MG946 servo with the driving shaft aligned forward. ![]() The remaining are components that can be found ol local hardware stores (remenber only that I use metric hardware) Then a small sg90servo, a 606 bearing and some steel spheres with a diameter of 6 mm. You mainly need 3 big servos MG995 or MG946 (they are dimensionally the same, but 946 are a little more powerful). If you do not have a 3D printer there are several 3D printing services like 3D Hubs that can do the work for you.Ĭommercial items can be easy found on the web. You need some 3D prinded parts and some commercial items. Here following the list of parts necessary to built the mk2 robotic arm. (I'm NOT sponsored by Pololu !) Anyway I also developed an instructable to be used on four axis servo driven robots with Arduino and an Android APP via Bluetooth. Can also be stored in the internal script memory and it can be automatically played without computer connected. You can store the servo position to a sequence and when ready it can be played once or in a loop. You have to install drivers, a software and when connected to usb you're are immediately able to drive the servos choosing their speed and acceleration also. I found very easy to use a Mini Maestro 12 Controller from Pololu, it is not very cheap but solve a lot of problems. ![]() On the two axis of the main vertical.arm I used M4 threaded rods SOFTWARE / FIRMWARE : The purpose of the robot is to provide an educational tool wich allow making experiment with different control methods. They are to be tightened till the locking of the joint, then consequently you have to loose them until you obtain a smooth movement with a low clearance between components. On screws are to be used selflocking nuts. This to allow a fine adjust of their diameter using an exact drill bit. (in alternative of M4 an #8-32 can be used) Holes of the joints are designed quite tight. I made available a short video of some of the parts printing on YouTube It has been replicated may times and you can view at Thingiverse user makes HARDWARE : I used metric hardware and all joints rotate on M4 screws. I printed all the parts using a Prusai3 with ABS filament, but also PLA works great. I supply all stl models already correctly oriented to avoid supports when possible. Some few components (like main horizontal arm 006) requires supports enabled and a printing area of 200x200 millimeters. You can find more DIY projects at my personal web page 3D PRINTING : It is a little more challenging to print than the mk1 due to its dimensions and also some parts geometry. You can find a dedicated instructable of the smaller mk1 at this link : EEZYbotARM instructable Please follow the original licence and provide attributions.ĮEZYbotARM Mk2 has been initially released on my Thingiverse account here: thing 1454048 You can copy and modify the files, designing your own version. You can find the source CAD files at this link EEZYbotARM mk2. It has been designed without a definite purpose, the aim is educational, providing a suitable hardware that allow to concentrate on exploring all its potential applications.įollowing the requests of many users I made available the whole project on my Onshape account. I implemented also some little features like: a replaceable gripper with quick coupler, internal cable routing in main big arms and the vertical axis supported by spheres. It is a little bigger and stronger, just to obtain more payload and increase reach. It follows the success of my previous smaller one: the EEZYbotARM so I simply called it MK2 (make 2). This is a four axis 3D printed robotic Arm.
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