What USB WiFi dongle are you using? Also, what are you using to power the robot? If you’re using non rechargeable (alkaline) batteries, could you use rechargeable (NiMh) batteries instead?

Regards

Alan

I bought my battery pack from Amazon, so had to make my own cable for the controller, but comparing to what you offer, its the same unit, so I would assume that eliminates the possibility of variations in the size of the battery pack.

I placed an order for some Dasu parts last week from a US based seller, didn’t know about this issue at the time, otherwise I could have ordered a second set of wheels to compare.

Thanks for persevering with this. When I get back into the office on the 5th I’ll try building another robot from scratch to see if I can recreate the problem. It is possible that Dagu (the company which make the 2WD chassis) may have done something like change the wheels to use different tyres without us noticing.

I’d be interested to know if the alternative method for positioning the battery pack works for you? This seems to work well for another customer, possibly using someting like velcro to hold it in place. If it works for you then I might change the instructions to recommend it, and include some velcro with the battery packs.

Regards

Alan

Any movement, and the clearance disappears. The battery pack just does not stay in a position where it can avoid touching the tires.

Looking at it some more, and comparing with the pics, I’m thinking its the thickness of the tires. And it makes sense, considering the likelihood that those are manufactured under much looser tolerances than the battery pack case. I’ve ensured the motor mounts are tight and everything is positioned correctly.

I can try to get some pics, but clear closeups that show the gap (or lack thereof) will be tough. Going to stew on this a bit and see if I can come up with a fix that will take care of the issue.

Manufacturing tolerances could be causing the issue but we’ve been selling the battery pack since June and not seen any problem until now, when there seem to be at least 2. Any extra information or pictures you can provide would be much appreciated.

Regards

Alan

I’m finding this very confusing, as I’ve never had any problems with the powerbank touching the wheels. The fit is a bit tight, but I’ve always found that there’s a small (approx 2mm) gap that allows the wheels to turn freely.

Having said that, I have had another customer report the same problem recently so I’m keen to try to work out wht’s going on here.

I’ve updated the post to include the pictures that I sent to my other customer, trying to clarify the issue (haven’t heard from him yet whether this improved things). Apologies that the images aren’t great quality, it’s tough to get in close to photograph the important areas, I’ll try to take better ones in the new year.

If you can see anything different between your kit, and the photos I’ve uploaded, I’d be very interested to hear. Are the tyres on your wheels thicker for instance?

Regards

Alan