Quote:
Originally Posted by Jonathan Norris
snip
We have designed our system to share the load across two of the gearbox's and sprocketed them down to a very reasonable level where we will will be using only 1/5 of the FP's stall torque. It now worries me that these gearbox's are no longer available, if we choose to use the ones we have will we be able to purchase replacements in the future?? Why are they no longer available?? simply out of stock, or quality problems?
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Using 1/5 of the stall torque of the FP would mean that you are pretty safe with respect to torque from the motor side. You have a pretty good shot at being able to limit the torque input by the motor.
If you can figure a way to limit the backdrive input from the arm to the gearbox, you'll be fine.
Now to your other points.
If you damage the gearbox, you can guy another ratio gearbox and rob parts to rebuild your 256:1 gearbox.
As to why they are no longer available, I didn't ask specifically, but I was under the impression that whatever stock they had in house has been sold. I don't know what or when or whether they will order more. My impression is that Banebots was not even planning on marketing these to FIRST folks. For our own reasons, we find them useful so we buy them but that was not their intent when they decided to add them to their catalog.
Joe J.