First Build - Featherweight Bar Spinner

[Ocracoke]

Hey there, welcome to the forum!

Specs look OK to me, perhaps a bit of a query on the drive motors as to wherever they'll have enough oomph to move this but otherwise looks fine. I will have to note that it is generally not a good idea for a first time roboteer to build a FW spinner - if they go wrong, they go wrong quickly and, as you can imagine, the consequences of that going wrong can be very hazardous. Also, not all robotic events support spinners due to their specific arena safety features - you'd have to get confirmation that you could use this.

To answer some of the questions you have:

2. I've been looking at using a round belt for the weapon drive - does anyone have any experience with these?

Not directly but if under enough tension, that should be OK. The only problem I can see is that after a few hits, the belt is going to wear out very quickly methinks but does avoid the need for a dedicated clutch.

4. Does anyone think the ball transfer units at the front are a bad idea?

Not particularly. I've used them before in The Honey Badger to help with turning. The problem with them is that they do have a tendency to fail under hard use and then it locks up. If you needed to save a bit of weight, you could replace these with some Oilon plastic feet to save a bit of weight.

[Eidg]

@DR.Crane Your drive Motors are too week.
I am using 800W Brushless Motors for my drive, the robot is also a spinner. Next time I will go for 1200W.
Your Motor has around 10W...
I would recommend you to use multi v ribbed belts, with the pj profil.