Boring Brick

[mrsam]

So after my near mental breakdown over the motor sprocket yesterday i've been greeted today by some good sprocket news i.e my Custom machined main sprocket from Technobots, only 40 tooth but as my initial idea was to have an 8 tooth on the motor giving an overall reduction of 5:1 it was fine for that, ( the ratio now will be like 4:1 but should be okay). Heres a pic of the sprocket and the motor Dave delivered to me on Thursday

[mrsam]

Just received an 11 tooth pulley for the motor from Jamie so the axe is back on track. Not sure how powerful it will be as the ratio now will only be about 3.5:1 but only time will tell, so once i've cut 15mm off the back of one of the bulkheads, bolted the motor down, made up a chain and bolted the whole robot back together it'll be ready for a test, still got loads of time right? . If the axe is too underpowered for my liking i'll order a cheap 58 tooth mini moto sprocket from ebay and bolt that to the existing sprocket thus bringing the ratio to just over 5:1.

[mrsam]

I've tried my luck at breaking some chain for the axe today and it has not gone well, i've been using a hammer and pin/screwdriver/punch basically anything and every time the chain moves or the tool im using just slips off the pin, does anybody have ANY suggestions because i don't have the money left for a chain breaker and at this rate the axe won't be working in time for the champs.

[geeza]

Put an appropriate size nut under the chain pin then hit it with a hammer and punch combo. When one side of the chain is loose twist it out of the way and turn the chain over and repeat.

To reassemble use the nut again held in a pair of needle nose pliers on top of the link. Then with the chain pin through the middle of the chain and on a hard surface hit the nut with a hammer. Turn over and repeat.

Been using this method for years, tricky but you will get better with practice.

[mrsam]

I've already tried that method and all it seems to have done is force the chain links together, maybe i need a smaller punch?

[geeza]

Probably, I had to grind one down to fit the 6mm chain.

[mrsam]

I might try grinding the tip down actually, cheers Ed

[mrsam]

I'm just going to leave this here.....http://s921.photobucket.com/user/mrs...ba7d1.mp4.html

[maddox10]

Looks good. Not overly powerfull, but functional, a great selfrighter .

[mrsam]

Thanks Mario, have yet to have a successful self right as the 40 amp fuses i'm using as links blow so i'll be getting some higher amperage ones and the chain also needs a tensioner to stop it jumping off so much but other than that i'm happy with the power.

[harry hills]

Brilliant work mate. I'm worried about that axe!

[Mega Masher]

Looks great

[mrsam]

Cheers guys, and Harry I wouldn't worry too much if I come up against massacre I won't be using the axe with that bar going

[harry hills]

It's when the bar stops I'm worried :P

[mrsam]

Made a shorter, tighter chain for the axe today and cut a piece out of the front panel to improve the travel and i think you'll agree the axe is much more potent http://s921.photobucket.com/user/mrs...3e6a0.mp4.html