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 Every team should have a rule about not shouting "ROBOT!" when transporting a robot around the pits/arena. - frasnow [more] |
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| Every team should have a rule about not shouting "ROBOT!" when transporting a robot around the pits/arena. - frasnow [more] |
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#1
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Re: pic: Another stripped VexPro gear
Hey FRCGuy are you sure you don't want my 2 lightly used 24 tooth Vex gears?
Cause...  It's probably too late for me to broach you steel gears. I also don't have 24 tooth steel gears to start with and I doubt I can get them fast enough. Going to put these on my list of 'coming soon'... 
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#2
04-29-2016, 04:15 PM
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Re: pic: Another stripped VexPro gear
Just in case it hasn't happened yet ...
I'll bet the VEX folks would like to hear from you. I'm guessing that they will want to know if A) they need to either include a caution with their parts to help users avoid exceeding the loads the parts are designed to sustain, or B) they need to investigate a batch of parts that might have been manufactured badly, or C) they perhaps need to tweak their product's design. If you are at the championship, I'll bet they are there too. Blake
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#3
05-02-2016, 10:27 AM
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Re: pic: Another stripped VexPro gear
Quote:
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#4
05-02-2016, 10:39 AM
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Re: pic: Another stripped VexPro gear
Quote:
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#5
05-02-2016, 11:23 AM
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Re: pic: Another stripped VexPro gear
Quote:
The push broach looks like this (this one is from Dumont): http://www.andymark.com/product-p/am-2204.htm It fits in either a hydraulic or arbor press. The 20 tooth steel gear I did for other teams look like this before I broach them: http://www.andymark.com/Gear-p/am-0186.htm You know that intelligence test where you put the round peg, in the round hole and the square peg, in the square hole? In this case you push with about 1,100lbs of force until the round hole chisels out to a hexagon  Proving once and for all - brute force can solve problems. Last edited by techhelpbb : 05-02-2016 at 11:29 AM.
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#6
05-02-2016, 12:16 PM
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Re: pic: Another stripped VexPro gear
Is the output direct driving a wheel (ie output shaft going through a rigid frame)? Look into the possibility for relative motion between the output gear and its driving gear. This could be caused by loose transmission mounting or flexing of the plastic case. With extra load/impacts on the gears being part of this game and improper gear mesh (caused by relative motion between gears) I imagine this could easily happen.
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#7
05-02-2016, 12:18 PM
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Re: pic: Another stripped VexPro gear
That exact thing happened to us (3230) at the Idaho Regional!
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