Gabriel

Thanks for the comments,
I may try to increase the weight of the axe head a little, and at the moment the battery is only rated at 12v this could easily be increased to 16.8v. increasing the power from the motor. But at the moment I want to get the robot finished for Portsmouth :D

Gabriel should be unbeatable!!!

Big Green wheels

Active weapon

Blue LED lights

Can't fail :mrgreen: :mrgreen: :mrgreen:

seen the video of the axe system, looks really good, got me thinking about doing a similar system :lol:

Quote:

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That works really well! I wonder if light and fast is better than slow and heavy (axe heads)?

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An Interesting question.
The effectiveness of a hitting weapon relies on three basic parts.
1/ Speed.
2/ Mass (or weight).
3/ Contact surface area.

I would say there is a small advantage going fast and light. The reason is, it dose not give the armour as much time to distort and in doing so absorb and dissipate the energy in the contact area.

But what do you think?

I have cut new top and bottom armour for the robot and moved the wheels back to help with control and turning :D


http://i569.photobucket.com/albums/s...l/IMGA5559.jpg

http://i569.photobucket.com/albums/s...l/IMGA5560.jpg

Working well till this happened

http://i569.photobucket.com/albums/s...l/IMGA5561.jpg
Going to redesign the drive system again :shock: :shock:
It won't be making it to Portsmouth now :cry:

Easy fix...

on the round part that has a square hole through it... tap that through the other side of the gearbox... file the crimped parts of the base of the gearbox to remove the 1mm ali cover plate...

Once uve done that you sould be able to nock out the shaft totaly with the gear and bushes...

Replace the shaft with a square hole with a solid bar of the same OD... re-build the gearbox, with bushes then pin through the boss on the nylon worm wheel into the new solid axle....

..bore out the pulley and fit it over the new solid shaft... then pin/grubsrew it on.

Something ive considered doing, as its probably a 30min job per side if you have a bar the right OD kicking around, and it can be done in the shed/garage without the need of a lathe.

Hope this helps.

Many thanks Dave,
I have stripped down the gearbox but The shaft is 8mm diameter but were the box wheel is, the shaft has straight Knurled splines the diameter there is 8.3mm
Has anyone the facility to put splines on 8mm round bar?
If so please PM me :uhoh:

If you pin the worm wheel you won't need the splines... Just something to take up the 0.3 gap... Maybe drill the gear centre out to 10mm and put some 8mm ID 10mm OD tube in to fill the gap? Then pin the lot together. Would be a simple fix to get you away...

A machine shop should be able to straight knurl a section of the 8 mm bar.