Hello, I've built the version AR3 twoYears ago and I would Like to upgrade it to the AR4. I already bought the teensy 4.1. There is any tutorial or any manual teaching how to upgrade it? thank you in advance

Hello! I live in Brazil and I can not find the driver DM542T, can I use the driver DM542 instead? what is the difference between them? i have not been able to find out what the T stands for

Hello! I am new to this world and I was trying to understand why the J5 motor is build this way. I just want to understand why it is a motor with a lead screw when it could have a belt like J4 motor. I am making this question because the way that it is currently, the assembly is much more complicated that a motor with a bellt or chain. Please keep in mind that I am new to robot building and I am here to learn! Chris did a really cool thing here and I am really exited with it.

Hi! I have a problem with the J5 limit swich... when I move the J5 motor it does not make the limit swich's button to "click" (NO TO NC), the limit swich gets "stuck" between the housing and the j5 carrier. maybe somebody had a similar problem with this parts of the assembly?

Hi! I finished building my AR3 robot and when I tried to calibrate the J1 motor it does not work properly.... It starts to move in the oposite direction of the limit switch and after 1 second, maybe less, it stops and the program says tha J1 is calibrated succesfuly. J5 is similar to J1, when I click auto calibrate only J5, the motor moves a little and then appears on the screen that calibration is succesfull. the carrier did not even touch the limit swich. All the others motors calibrate similar to the startup procedure video on youtube: it moves until it reaches the limit switch, then goes in the opposite direction slowly and the slowly reach the limit swich again. I checked the wires and apparently all the wires are correct. do you guys have any suggention?