Finally we are up and running again, and I got some new parts in the mail yesterday!
Starting to look like a ball!
For the moment I have to glue the bows together, but that's OK.
Maybe in version two I'll manage to make them snapable.
I got a couple of new pieces today but I'm not completely satisfied!
I've misunderstood how the printing resolution works. I thought it would affect the surface roughness, but not the measurements.
This resulted in too thin material at the connection points
A quick update.
I had to change the tires of my wheels, the o-ring I meant to use had a diameter of 40 mm and I changed to one with a diameter of 45 mm instead.
New wheel diameter increased the top speed from 10 km/h to 11,5km/h 😎
I've been doing a lot of work since last time and there have been some changes in the design as well!
After I assembled a couple of parts in FreeCAD I realized that I had miscalculated (in my head) the size of some of them 🙁
I had to flip the base plate upside down to make room for the steering cradle and remove the friction wheels, because they wouldn't fit anymore. I also had to make the propel wheel larger to get better grip and to make the ball go a bit faster.
The approximate speed is now somewhere about 10 km/h, which is a quite good speed I think.
The base plate front view - with motors and steering craddle and its servo
Another post is up, about the propel system this time!
I have this idea that the ball will be driven with a motor and a small wheel inside a bigger ring, with a friction wheel underneath.
Sorry for my bad sketch
Finally I think we nailed the printing tolerance measurements! We also changed from white to black ABS filament, which seems to behave more accurately than the white one does.
I added some snap connections and push fittings to the new test piece so we can see if the printer has an accurate repeatability
Here's the alien mask when all the wires and servos fitted and mixed in the radio controller.
Check out my other post about the mask here: Animatronic mask
Igår var jag i "Hallen" och hjälpte Peter att programmera två radiosändare som ska styra en monstermask till ett hemligt projekt 😎
