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  #16   Spotlight this post!  
Unread 14-02-2012, 20:29
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Re: Things You Shouldn't Do

Never, ever drill a hole in a block of wood unless it is clamped down. Our team captain lost a large part of her finger this way.
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Unread 14-02-2012, 21:20
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Re: Things You Shouldn't Do

Quote:
Originally Posted by Whippet View Post
Never, ever drill a hole in a block of wood unless it is clamped down. Our team captain lost a large part of her finger this way.
Last year we were cutting a piece of plywood on a table saw. The newly cut piece of wood got lodged between the saw blade and the sliding guide and shot 20ft clear across the shop making a large hold in the wall.
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Unread 14-02-2012, 21:52
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Re: Things You Shouldn't Do

Quote:
Originally Posted by Trez View Post
Last year we were cutting a piece of plywood on a table saw. The newly cut piece of wood got lodged between the saw blade and the sliding guide and shot 20ft clear across the shop making a large hold in the wall.
Lexan + same set-up + me standong there = Ouch
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Unread 14-02-2012, 23:41
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Re: Things You Shouldn't Do

Make sure everything on the CNC work tray is clamped down or the material will spin on the bit at approximately 2500 RPM until the bit breaks.
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Unread 15-02-2012, 08:12
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Re: Things You Shouldn't Do

Quote:
Originally Posted by Trez View Post
Last year we were cutting a piece of plywood on a table saw. The newly cut piece of wood got lodged between the saw blade and the sliding guide and shot 20ft clear across the shop making a large hold in the wall.
That's called kickback, and it's one reason why the table saw is probably the most dangerous tool in your shop. Please be careful!
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Unread 15-02-2012, 08:39
MichaelBick MichaelBick is offline
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Re: Things You Shouldn't Do

Don't use bad PWMs. Also, don't connect PWMs backwards.
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Unread 15-02-2012, 08:50
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Re: Things You Shouldn't Do

never trust the robot when its on
we lost connection with it and it went after the whole team
robot+lose connection=sprang ankle and no more camera turret
don't forget when your working on it to put it on blocks......
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Unread 15-02-2012, 09:19
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Re: Things You Shouldn't Do

Neophyte team member sent to deburr a hole in a plate... 30 seconds later, we hear a loud sound and I spend the next 30 minutes extricating said plate from deep within the belt sander...
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Unread 15-02-2012, 09:57
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Re: Things You Shouldn't Do

DO NOT! go up to your team's CAD computer and decide it would be funny to mess around with the design. While fixable with 'undo' or 'ctrl z', it is really annoying and not remotely funny. One time a rookie even accidentally caused the computer to freeze up, making me have to re-CAD everything I had been working on

Do: Constantly save your CAD drawings
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Unread 15-02-2012, 12:15
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Re: Things You Shouldn't Do

This happened to us a week ago. If you need to drill holes in a plate, and the holes are right above an encoder, NEVER EVER drill them without removing the plate!!!

That encoder took too long to replace
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Unread 15-02-2012, 12:22
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Re: Things You Shouldn't Do

Do not try to see if the battery fits and accidentily touch the battery terminals to the frame causing sparks and the unfortunate nickname of Sparky.

Also do not forget to put the tailgate up on the truck you are hauling the robot in. You will make a turn and the robot will fall out on the highway.
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Last edited by treffk : 15-02-2012 at 12:23. Reason: Remembered my second do not
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Unread 15-02-2012, 17:17
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Re: Things You Shouldn't Do

Do: Insulate your batteries the INSTANT you get them. I thought everybody did that...
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Unread 15-02-2012, 18:26
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Re: Things You Shouldn't Do

We had a 2-cim shooter setup, and wired the positive wires from each motor to one jaguar, and the negative wires to another! Thankfully, the jags survived and seem to have avoided any damage.
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Unread 15-02-2012, 19:34
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Re: Things You Shouldn't Do

Quote:
Originally Posted by electron View Post
Things to not do:
-Think you can worry about wire management after everything is wired.
-Put the Digital Sidecar in the most out-of-the-way, hardest-to-reach place on the robot you can possibly imagine.

Things to do:
-Make sure the jags are not wired backwards..
We actually did a similar thing, putting power into both sides of a Jaguar, and found that it was unresponsive afterward.
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Unread 16-02-2012, 08:10
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Re: Things You Shouldn't Do

Don't wire motors directly into the power distribution board and turn the robot on.
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