Deathly Hallows - FW - Alligrater

[Deathly Hallows]

One note about those motors. Epoxy the magnets.

I was told I'd need to glue them in. Any particular product I should look for - something special a thermal adhesive epoxy or good old super glue?

I found a suitable sprocket on Robotshop, 48T and 0.25" so should work fine. 10:48 will give me 2750/4.8 = 573 rpm
Still rather nippy but it will be manageable with a tweak to the TX settings I think. It's important I get the drive sorted quickly so I can work on the other systems. If it's a rolling wedge at least I can push stuff, and at 30kph (if my rough maths is right) I could push quite quickly.

Looking at this sprocket it will go around the fixed axle no problem, fixing it to the heel is another question. Needs to be dead center, probably need to make a tool to ensure I fix it right. Was thinking I would bolt it through the wheel hub. No appropriate mounting holes so I'd make those, and a plate or spacers to keep the plate off the wheel.

I think a belt tensioner will be essential. Found a few options mostly for dirt bikes.

Also need to do the calculation for the battery.

Can anyone tell me how much time is there between rounds typically? Do you get time to top up charge or should I plan for a massive 6S battery or a couple of smaller ones?

[Maxamuslead]

I was told I'd need to glue them in. Any particular product I should look for - something special a thermal adhesive epoxy or good old super glue?

Epoxy, i used THIS stuff and it has worked fine (no loose magnets yet) and depending on how they magnets are held in it depends on how you glue them. If you look at Blacksmith Build log the last page shows you the two version i have found.

I found a suitable sprocket on Robotshop, 48T and 0.25" so should work fine. 10:48 will give me 2750/4.8 = 573 rpm

Still rather nippy but it will be manageable with a tweak to the TX settings I think. It's important I get the drive sorted quickly so I can work on the other systems. If it's a rolling wedge at least I can push stuff, and at 30kph (if my rough maths is right) I could push quite quickly.

Looking at this sprocket it will go around the fixed axle no problem, fixing it to the heel is another question. Needs to be dead center, probably need to make a tool to ensure I fix it right. Was thinking I would bolt it through the wheel hub. No appropriate mounting holes so I'd make those, and a plate or spacers to keep the plate off the wheel.

I think a belt tensioner will be essential. Found a few options mostly for dirt bikes.

Depending on what tools you have and what you are going to use for wheels depends on how you are going to mount it. If you using HDPE i would suggest drill holes through the wheel and bolting to too the wheel, about getting it true, i can see three methods:

1 Eyeballing it, quick dirty and with the help of a ruler can be accurate enough that it shouldn't wobble too much.

2 Use a 1” hole in your wheel and a 1in shaft, should be fairly accurate, what i used on my axe mechanism it worked well enough.

3 Model it in CAD and find a model or make a model of the sprocket us that to make a wheel design and get it cut out.

Also need to do the calculation for the battery.

Can anyone tell me how much time is there between rounds typically? Do you get time to top up charge or should I plan for a massive 6S battery or a couple of smaller ones?

ermm I would look at 2700mah + battery what voltage is up to you. I fully drained a 2200mah battery using 550 motors x2 for drive and a MY1016 for an axe (so not contain draw) in 4 mins ish. Michael did you take part in the Featherweight play time at Manchester, if so do you remember how long that match was ?