Added the project to github.
You can find the code that I used there.
Hello, unfortunately because of some job related problems, I had to give away the table and pack the robot as probably I will have to move soon .
So I am afraid no progress will be made in the next months .
I am happy to support with any information if somebody is working on the same robot .
As soon as my situation gets better I will get back to it .
Added videos with Banebot wheels and improved stepper support :
First garage tests :
This is a remix of the Table Tennis Robot from instructables :
The original printed parts can be found here, many of them are used, but what I changed was :
-There is some different type of DIN50 PVC pipe and connectors, so I made some adapter parts when the original ones would not fit to what I bought, this can vary greatly based on the shop .
-The feeder is no longer using the piston and a servo, instead it is using a disc (designed by informer from rhcforum.ro) which is rotated by a stepper controlled by Arduino via an stick driver like the ones used in RAMPS board for 3D printer
-The motors, I changed from the BLDCs used originally to the Mabuchi RS-540 from hobbyking, this is a very cheap, very powerfull motor, also I used 20 A brushed ESCs from Hobbyking which are also very cheap
-The wheels, I used some aluminium hub rubber wheels which are normally used for landing gear on jets on hobbyking, also a 4 mm shaft and bearing si needed and also an axle adapter from 3.17 mm to 4 mm (I also tried printed wheels with 40 mm orings as rubber, but no success, they have horrible vibration, still the stl is available)
-The rotation mechanism for the head is changed, this is based on alvinchua's design from instructables, it is a gear based rotation so no belt is needed
-The original software was taken and then it was changed in order to control the stepper and the new ESCs . Also a BT module was added and an application for Android was made in order to control the robot
Here are the links to the alternative parts that I used :
The parts that I use will work with some additional printed parts and hardware that I listed into my project .
Hope this helps you .