1.5 Weeks till nationals and OVER9000! went out the window when the beaters turned out to be unusable (Will shelve that idea till early next year).
So time to fall on the oldest backup plan ever...
Build a Brick/Wedge!

ANNOYING BOX RUSH


Specifications
Chassis/Armour: 6mm & 10mm Aluminium, 5mm Hardox 450.
Weapon: Wickly fast drive train, a Hardox wedge and trash talking.
Drive: 18V DeWat 3-speed gearmotors with 4"x2" Colson wheels, T5 belt drive
Controller: BotBitz 85A ESCs for drive
Batteries: 18.5v 5S Turnigy NanoTech 4500mAh 65C-130C LiPol

Essentially, FarmBoy 0.75....
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https://www.halfdonethings.com/

Nice ...where did all the time go?....those toothed belts should work great ...you probably wont need a tensioner with them either right?
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Miles Blow - Julie Pitts
www.mulesfilm.com.au
www.wombokforest.com.au

-Pickasso- Vivid Sportsman champion 2015

quote:

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Originally posted by miles&Jules:
Nice ...where did all the time go?....those toothed belts should work great ...you probably wont need a tensioner with them either right?

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After a day in bed with a screaming migrane, I had a lot of enthusiasm this evening to clean up the mill and start making some bearing blocks.


I love my fly cutter... so smooooth....


Just need to fit the 4-jaw to the lathe and spin up the bearing block
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https://www.halfdonethings.com/

Ah, love the chuck mounting on the C6... Crack 3 nuts, twist the locking plate, pull the chuck and off it comes.... So so simple, makes a chuck swap take 1 minute tops!


I don't have a dial indicator, so the quickest way I could think of for lining up the bearing blocks into the 4-jaw was to center mark it, center punch it then use the tail stock in the lathe to center and hold the billet while I adjust the jaws into place. Worked a treat and seems to be within 0.25mm according to my calipers, which isn't bad for my machining skills


Center mark stayed center with no wobble, good enough!


Ran the 15mm drill bit through it to give the boring bar some room for machining out the bearing pockets.


First bearing in


Second bearing in


Bearing block, shaft and pulley in place, just needs drilled and tapped, then bolted to the base.


Quick hook up of the belt and it's looking nice.
_________________
https://www.halfdonethings.com/

Lookin good!

That's how i stick non square stuff in the 4 jaw too. Would probably push the limits of travel of most indicators trying to align something that size with one anyways.
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Now on holidays... 2 days to build 13.75kg of robots.... >.>








_________________
https://www.halfdonethings.com/

C'mon, three whole days to get it finished! Is that extended base plate for a wedge, or is it going to be a real box all 'round?

I'm reusing the original 6mm aluminium base plate from Farmboy (see the track difference!) and the extended bit will be cut off shortly. It will be boxy on all sides, but have an attached wedge a bit like Warning. Still not sure what I'll do wedge wise, but what ever weight is left will probably go into it
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https://www.halfdonethings.com/

Love it, looks so beefy!

This is probably my lack of experience showing in drivetrains that don't simply consist of a couple of cheap drills, but what keeps the free-running shafts from coming out of the bearing blocks?

If, say, the timing pulleys weren't perfectly aligned, I would expect some lateral movement from the shafts, resulting in the possibility that the driven wheel could pop out. Is it just the force of the press-fit in the bearings that holds the shaft in?
_________________
Jamie
RogueTwo Robots
www.rogue-two-robots.vze.com

With great power, comes great reliability

quote:

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Originally posted by RogueTwoRobots:
This is probably my lack of experience showing in drivetrains that don't simply consist of a couple of cheap drills, but what keeps the free-running shafts from coming out of the bearing blocks?

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I don't know what I'm doing




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https://www.halfdonethings.com/

quote:

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Originally posted by Knightrous:
I don't know what I'm doing

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Yeah, that looks at least mild annoying

Nice touch......please can you leave those wheels exposed ?he he.
_________________
Miles Blow - Julie Pitts
www.mulesfilm.com.au
www.wombokforest.com.au

-Pickasso- Vivid Sportsman champion 2015