Near Chaos Robotics

[MikeNCR]

Looks nice

Are the wheels going to be mounted direct on the Dewalts gearboxes or on their own axles?

Wheels are on their own shafts with an additional 1.25:1 reduction off of the dewalts.

[Ellis]

You seem to be turning into the Sebastian Vettel of the combat robot world! That's an impressive record. Thanks for going through the trouble of filming and uploading these.

Right, there goes my day, starting at video 1.

[playzooki]

Pretty cool

[PJ-27]

That looks awesome!

[shakesc]

Mike, interesting. I guess with the wheels that size the extra reduction is useful. Did you need this for any shock resistance to the motors themselves?
Also I heard that the Dewalts have a winding advance so that they are 7% ? faster forwards than reverse. Just wondered if this was correct and how you then are looking to balance that?

Chris

[MikeNCR]

Mike, interesting. I guess with the wheels that size the extra reduction is useful. Did you need this for any shock resistance to the motors themselves?
Also I heard that the Dewalts have a winding advance so that they are 7% ? faster forwards than reverse. Just wondered if this was correct and how you then are looking to balance that?

Chris

Offset is mainly for two things- Extra reduction, and shifting the weight balance closer to the wheel axles. As far as the timing, my intent is to get the forward direction driving straight and rely on the fact that it will only be reversing for short distances to deal with the timing issues. It may twist a bit when swinging the weapon, but it shouldn't be all that much since with the balance it should swing the body very smoothly.

[MikeNCR]

Here's the chainsaw attachment in progress:



Still have to cut the slots in the arm for the sprockets and finish welding the teeth in place. For now they're all tac'd in place as I was running low on argon for the welder. When done it'll be powered by a 775 size motor geared down to a tooth speed of approximately 20ft/s.

[RoboLibre]

I'm liking the look of this chainsaw Mike

You know... you could probably get away with using military/emergency rescue chainsaw chain, as that stuff is designed to hack through metal and ice... just some food for thought from your friendly neighborhood Arboriculturalist

[MikeNCR]

Spanky is wired up and running. Weight is just a hair over 22lbs as pictured, leaving almost 8lbs for weapon configurations. The spike wedges are 1lb 3.4oz and will be used primarily with the axe and hammer weapons. I'm intending to armor up the chainsaw and circular saw attachments as heavily as the weight budget allows me.

Here's a finished shot with the high visibility paint job-

[RogueTwoRobots]

That looks amazing
They may not be the most effective weapons around but gotta love the retro nature of chainsaws.