I figured with all the money saved on precision linear components I'll just blow all the savings on some crazy ideas for calibration. I thought that once you have it calibrated, something like this will really help with storing the calibrated position: Got some samples a while back and it is simple enough to work with. It says 14-bit resolution in the summary, but I think I remember from the dby lerouxb - Polar Machines, SCARA, Robot Arms
I AM looking at the Wally and I have tons of ideas for calibration. I kinda got to this idea via wanting to build something with DC motors, eventually realised that it is very similar to the Wally, so started having a closer look at it. If everything really fails I'll go back to something cartesian because building a quiet printer is most important to me.by lerouxb - Polar Machines, SCARA, Robot Arms
Here is some progress on the arms and motor mount for my parallel SCARA bot. It is mounted against a "wall" (actually a wine box for now..) similar to the RepRap Wally, but I'll probably go with something fairly conventional for the z-axis and I'm not driving the elbows, but the corners at the wall. The gap between the motors are twice the length of the arms as I ran some simple simulations usingby lerouxb - Polar Machines, SCARA, Robot Arms
Thanks I managed to figure it out. I found some maths for something http://forums.reprap.org/read.php?185,490216,page=2]very similar on this forum and then adapted it for mine. Here's a video of my forward and reverse kinematics progress in operation. I'll put the code up on github soon.by lerouxb - Polar Machines, SCARA, Robot Arms
Hi I'm building a parallel SCARA similar to the Wally, except I'm planning on driving the bases of of the arms rather than the elbows. My goal is to make a really cheap, mostly 3d printable printer that's as quiet as possible. So just to make things extra interesting, I'm planning on using DC motors with optical encoders and really high gearing so I can get the accuracy/precision required. I sby lerouxb - Polar Machines, SCARA, Robot Arms