Gluing/Melting the Plastic on the Dagu Rover 5
March 13, 2013
Do any of you know what kind of plastic is used to make the Rover 5?
It doesn't have the "feel" of ABS. My guess is it's polystyrene.
In the process of repeatedly opening the gearboxes on my Rover 5 bots, I've stripped a few of the threads, cut by the self threading screws, used to hold the gearboxes together. I know different types of plastics need different approaches to gluing or melting the plastic back together.
One of the threads I stripped held the encoder board to the gearbox casing. I repaired this with some thick super glue (CA) and it seems to be holding up okay.
I'm about to once again open up the gearboxes. While it's apart, I'd like to strengthen some of the threads.
I don't think the problems I'm having with the threads is a defect of the Rover 5. The stripped threads are a result of my having taken about the gearboxes many times as I've experiemented with the Rover 5. IMO, the Rover 5 is a pretty amazing bot for the price.
I have wondered about melting a small amount of Polymorph into the thread holes hoping the Polymorph would bind with the plastic. I know Polymorph sticks to some plastics really well while other plastics don't create a bond at all with it.
I don't have any modeling glue for plastic models. I'm guessing it would work well. I do have some acetone that can be used with some plastics to kind of melt the plastics together.
I'd rather not continue to use the CA since it has such a different consistency than the Rover 5 plastic. I also don't want to glue the gearbox together, I just want to reinforces the threaded holes.
BTW, I recently noticed Parallax is selling a grey 2WD version of the Rover 5.
Here's a picture of one of my Rover 5 experiments.
I attempted to increase the encoder resolution by using more black and white stripes on the encoder disk. The increased resolution worked on a couple of the wheels but some wheels didn't read the new encoders are full speed.