A great thing about having the platform below the wheel axis is the inherant stability, evident by the fact that it stands by itself!
The ground clearance is pretty good too!
Now I take a break from frame building and focus on the electronics.
Thursday, 15 January 2009
Frame Done!
I have added the motor mounts and painted the frame with Black Hammerite.
A great thing about having the platform below the wheel axis is the inherant stability, evident by the fact that it stands by itself!
The ground clearance is pretty good too!
Now I take a break from frame building and focus on the electronics.
A great thing about having the platform below the wheel axis is the inherant stability, evident by the fact that it stands by itself!
The ground clearance is pretty good too!
Now I take a break from frame building and focus on the electronics.
Monday, 12 January 2009
Almost Completed Frame
After lots of hacksawing...
I have finally finished the basic frame.
The plan next is to weld on the motor mounts, sand down the frame and spray it in black textured paint to give a tough and attractive finish.
I have finally finished the basic frame.
The plan next is to weld on the motor mounts, sand down the frame and spray it in black textured paint to give a tough and attractive finish.
Tuesday, 6 January 2009
Frame Base
I welded together the base of the frame tonight, interesting feeling is having heat in your hands and 0 degrees celsius elsewhere, it was cold outside tonight!
I'll be doing the wheel support arches when I receive the wheels to confirm measurements.
I'll be doing the wheel support arches when I receive the wheels to confirm measurements.
Motors
I got the 750W motors today from Technobots.
One runs at 1.5A idle (at 24V) and the other at 1.8A idle, probably due to manufacturing tolerances. Maybe I'll have problems with tracking straight when its finished?
One runs at 1.5A idle (at 24V) and the other at 1.8A idle, probably due to manufacturing tolerances. Maybe I'll have problems with tracking straight when its finished?
Monday, 5 January 2009
Disc Mount Sprockets
I received the disc mount sprockets today:
Hopefully tomorrow will bring 2 front 20" disc hub quick release wheels and then progress will be possible!
Hopefully tomorrow will bring 2 front 20" disc hub quick release wheels and then progress will be possible!
Saturday, 3 January 2009
Accurate Frame CAD Drawing
I found Google Sketchup to be very hard to use and therefore I couldn't create a decent CAD drawing. I transferred to using Solidworks at my university and drafted this:
And rendered this:
Big Frame Picture
Mockup with Tires
And rendered this:
Big Frame Picture
Mockup with Tires
Thursday, 1 January 2009
Initial CAD Drawing
I knocked up a concept CAD drawing in Google Sketchup to get a feel of the design. Having tweaked it, I'm satisfied that it will be good.
Points to note:
- The foot platform is below the centre of the wheels. This may help its stability, but more importantly it reduces the step up and travelling height.
- The wheels are supported from both sides. Whilst this may have an unsightly look to the frame, it means the design is cheaper as it can use standard bicycle parts.
- The overall width is 600mm, this was my target width to easily drive through doorways.
- When the motors are installed, there should be ground clearance between 75-100mm.
Points to note:
- The foot platform is below the centre of the wheels. This may help its stability, but more importantly it reduces the step up and travelling height.
- The wheels are supported from both sides. Whilst this may have an unsightly look to the frame, it means the design is cheaper as it can use standard bicycle parts.
- The overall width is 600mm, this was my target width to easily drive through doorways.
- When the motors are installed, there should be ground clearance between 75-100mm.
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