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Pop quiz?


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rjw



Joined: 04 Jul 2010
Posts: 110
Location: Miami, Fl. USA


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Pop quiz?

Here is a quick question that maybe some of you already have an answer to...
You have a horizontal undercutter with a live shaft and when you drive around with the weapon spinning, the weapon shaft is kind of steering the bot!!
How do you stop (or minimize) this from happening?
Here is the bot in question...

Post Sun May 26, 2013 11:02 pm 
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marto
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Joined: 08 Jul 2004
Posts: 5459
Location: Brisbane, QLD


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Short answer. You really can't.

Sharpening it to a point will help the most but then it will get stuck on any divet or join. You can round it into a ball shape which will also help a little.

I put one of those roller bearings which you sometimes see on floors for moving around large palletised/boxed gear in warehouses on mine back in the day. Which also helped but wore quite badly.

Steve
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Post Sun May 26, 2013 11:11 pm 
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rjw



Joined: 04 Jul 2010
Posts: 110
Location: Miami, Fl. USA


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I actually came up with a good solution, but was wondering if it was unique...so I am fishing... Cool

btw: I received the escs, including the one..thx

Post Sun May 26, 2013 11:21 pm 
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Glen
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make a domed endcap with another bearing in that so it stays stationary. Always thought that may work but found the concept of a live shaft in a robot weapon to be backwards vs a fixed axle so never did it :p
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Post Sun May 26, 2013 11:28 pm 
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rjw



Joined: 04 Jul 2010
Posts: 110
Location: Miami, Fl. USA


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quote:
Originally posted by Glen:
make a domed endcap with another bearing in that so it stays stationary. Always thought that may work but found the concept of a live shaft in a robot weapon to be backwards vs a fixed axle so never did it :p


In the case of an undercutter, how would you have a dead shaft? Unless the hub that the blade is mounted on extends up throught the frame? seems way more complicated than a live shaft.

Post Mon May 27, 2013 3:09 am 
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Daniel
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Joined: 30 Aug 2005
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Location: Gold Coast


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If you made the hub and the pulley as the same part and mounted the bearings/bushes into the hub/pulley you'll be able to have a dead shaft.

Post Mon May 27, 2013 6:52 am 
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rjw



Joined: 04 Jul 2010
Posts: 110
Location: Miami, Fl. USA


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quote:
Originally posted by Daniel:
If you made the hub and the pulley as the same part and mounted the bearings/bushes into the hub/pulley you'll be able to have a dead shaft.


Agreed...that was what I was tryoing to say in my previous post....but, I do have a good working solution that I will reveal once I have this bot finished (motor gear slipping, am waiting on a replacement)

thanks for the feedback guys...will reveal all soon!!

Post Mon May 27, 2013 8:10 am 
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