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Update
Kinda forgot about this thread now I've got a FB team page on the go, time to bring it up to speed.
Spent some time over the past few weeks building a robot around the axe module I made pre-champs. Rather than try and get it all in weight when attached to Carcinus, I figured it would work better as its own machine and it means I can tick axe-bot off the list. Back when the Bosch 400 was intended for it, the name I had was Grond (a LOTR reference), but now it's called Onyx. No particular reason other than I think it sounds cool, and no connection to the mineral.
This is how it looked from the back shortly before it appeared at a Scot-Bots talk a couple of weeks ago:
Since then, the Scorpion XL has been transplanted into Carcinus after I blew up one of its ESCs by running it on too high a voltage (Mtroniks, 12V max) and Victors have taken its place. The LED strips have also gone after I forgot that they too only operated up to 12V and proceeded to plug them into a fully-charged 5-cell lipo pack. The receiver, RX battery and link all now reside in the front right-hand section.
Filmed a test of it today which had mixed results. Overall, the robot is very nippy and, although the axe won't cause much damage, it's really fun to play with and self-rights the robot nicely. The Victors don't offer nearly as much precise control as an XL, something which I've never noticed previously, so will look at getting another Scorpion or some TZ-85s somewhere down the line. The axe gearbox also jammed up as a result of the pins coming out. The same thing happened at the Scot-Bots talk and although I repaired it, it wasn't enough. I reckon I can redo the repairs more sufficiently for it to work for sustained periods, but if it's going to be a persistent problem, I might look at making the transmission two-stage, with the first stage being a timing belt and pulleys from the motor, just to try and reduce shocks. Probably won't happen before Edinburgh though, so will see how it gets on then.
http://www.youtube.com/watch?v=8aObqgv2r2E
Need to grind some bits off the chassis somewhere too as something's fouling on the floor, hindering the drive a bit.
Kinda forgot about this thread now I've got a FB team page on the go, time to bring it up to speed.
Spent some time over the past few weeks building a robot around the axe module I made pre-champs. Rather than try and get it all in weight when attached to Carcinus, I figured it would work better as its own machine and it means I can tick axe-bot off the list. Back when the Bosch 400 was intended for it, the name I had was Grond (a LOTR reference), but now it's called Onyx. No particular reason other than I think it sounds cool, and no connection to the mineral.
This is how it looked from the back shortly before it appeared at a Scot-Bots talk a couple of weeks ago:
Since then, the Scorpion XL has been transplanted into Carcinus after I blew up one of its ESCs by running it on too high a voltage (Mtroniks, 12V max) and Victors have taken its place. The LED strips have also gone after I forgot that they too only operated up to 12V and proceeded to plug them into a fully-charged 5-cell lipo pack. The receiver, RX battery and link all now reside in the front right-hand section.
Filmed a test of it today which had mixed results. Overall, the robot is very nippy and, although the axe won't cause much damage, it's really fun to play with and self-rights the robot nicely. The Victors don't offer nearly as much precise control as an XL, something which I've never noticed previously, so will look at getting another Scorpion or some TZ-85s somewhere down the line. The axe gearbox also jammed up as a result of the pins coming out. The same thing happened at the Scot-Bots talk and although I repaired it, it wasn't enough. I reckon I can redo the repairs more sufficiently for it to work for sustained periods, but if it's going to be a persistent problem, I might look at making the transmission two-stage, with the first stage being a timing belt and pulleys from the motor, just to try and reduce shocks. Probably won't happen before Edinburgh though, so will see how it gets on then.
http://www.youtube.com/watch?v=8aObqgv2r2E
Need to grind some bits off the chassis somewhere too as something's fouling on the floor, hindering the drive a bit.
great vid, that does look like its got a good bit of power
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