Quote:
Originally Posted by Ian_Xodus
Thank you for all of your input but my question has still not really been answered.
do you guys build your own gearboxes for the globe motors?
Do you use any special programming to make the motor stay slightly engaged to keep the arm up?
Do you use globe motors, van door, or window?
Sorry... only my second year in first.
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In answer to some of your questions, The gearboxes that are on the Globe and the Keyang window motors pretty much match at output speeds. The part that I posted, one end goes on the globe shaft and the other picks up the "gear" on the window motor. The globe was monted to a plate and the plate was mouted to the frame and the window motor. The #25 chain teeth drive chain that is attached to a sprocket that was attached to the last arm. Thus the motors were mounted "nose to nose". The globe gave us the oomph and the window motor helped, and with power off, Held the arm in place. I'm attaching a picture of the last stage you can kindof get an idea of how we did it. You will not need as large a final sprocket as this year your not trying to move a 12 lb tetera. (the vision one). A multi turn pot with a #25 chain sprocket mounted to the frame read the position of the arm. The nice thing about pots with sprockets is you can change the number of teeth on the pot sprocket to get full range out of the pot. Just remember smaller sprockets get more truns on the pot for the same arm angle change. It seems kind of backward but if you work it out you will see.
(Also BTW each motor had it's own victor, although one victor is plenty to drive this setup if this years rules allow it, Also triple check wiring so the motors work together, I tended to label with arrow which way things turned with a marker on the part of the motor showing so I knew if red went to pos or it it was the other way)
Biff