The Unnamed (FW)

[Pinski1]

One or more of the pins of the carrier on the outgoing axle came out and locked the gearbox.

I think the solution is locking the axle to the bearings so it can't move longitutal. (in and out)

I'll have a look at the gearbox closely then, seems a shame this is a known problem without a factory fitted fix. Unfortunately due to my setup I can't see a way of locking the axle to stop longitudinal movement, I guess a cir-clip on the shaft could help, but I don't know where I could fit it.

EDIT: Well, I must be on drugs. I checked the motor around lunchtime today and the gearbox was fine. The motor spins again, put it back together and drove it around some more. I'm utterly stumped, WTF it was catastrophically buggered Saturday night but now they work almost perfectly. I guess it was the drill motor fairy?

How come you left slack in the belt? There are lots of calculators out there that will give you the exact distance between centres so they are perfectly positioned from the start.

That's exactly what I did! I've got 300mm between drive axle and driven axle, I've got 22 tooth pulleys on both axles for HTD 5mm pitch 9mm wide belt. This works out to exactly to the standard 710 tooth belt which is what I bought and fitted. I've mesured the spacing and it's 300.00mm. *shrug* I knew I'd have to deal with some slack as the belt stretched and wore but I wasn't expected as much as I have right now. Of course it's not difficult to deal with, a delrin guide will reduce wear and keep the belt tight.

I'm sure a solution can be found, I imagine you're already cooking up your own!

Oh I've got you're solution right here!

Just kidding they're for messing around with, They're much too large for this bot, at the moment...