Forum Posts

makopack
Oct 26, 2020
In Questions
Ok, finished the build on the AR3. Was having issues getting anything to work ,but then realized that I had the motor driver switches backwards (who uses DOWN for ON??!?!) Anyhow, I'm currently experiencing 2 issues - 1) The motor driver for J6 is slow flashing a red light and I can't get the motor to do anything. I've double checked the wiring visually between the motor and the port on the robot and that all seems correct (splices are correct color-color, and on the right pins of the port), checked the cable (tried swapping out cables), and checked the continuity of the control box port-controller. All looks good. Checked all the other wires going in into the controller and they all seem to be right. Kinda stumped as to what to check next. Any help appreciated. Do I maybe have a bad controller? I guess I could try swapping the configuration with J5 and see if it works or gives the same error... 2) J5 works, but seems to have a TON of slop when changing directions. When I command a 10 degree change in the opposite direction, I don't see any movement at all, but when I then do another 10 in the same direction I see it move properly. If I then command 10 in the opposite direction I see nothing until I do a second 10 in that direction. Any ideas how to remove/adjust this slop out? 3) Which direction is +/- supposed to be for each joint?
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makopack
Jul 16, 2020
In Questions
Looking through the manual I noticed 2 spots where it says to counter-sink holes. What size bit should I use for doing that?
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makopack
Jul 12, 2020
In Questions
First off, Chris, I really wish you would include the various parts needed for the gripper (the solenoid and such) in the manual in the bill of materials / parts section like you do with the actual gripper... I didn't even think to look to see if there was anything else needed when I ordered all the parts, so now I need to put in more purchase orders to get the rest... Second- what are you guys using for a Pneumatic source? I know that the FRC teams use a small 12V air pump, pressure regulator, control board (to know when to pump more air) and something like .5L storage tanks. Is this something we could add (and standardize) so as to make it a common setup? It would automatically pump up pressure at startup, get it into the storage tank and then turn off the pump and only come back on as it is needed (as the gripper gets used). How much pressure do we need for the gripper to function?? Here's the info on what they use for FRC: https://firstfrc.blob.core.windows.net/frc2017/pneumatics-manual.pdf
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makopack
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