User test

We went back to Marc to test with the bigger uphill part to test if it was also better for him.

The results of this model were good. It's not too steep anymore. 

Marc has the wish that it would have a nice color and not just the wood multiplex.

Prototype 14

Goal to test if the uphill side is still to steep

based on prototype 13
We also made it out of 3 parts to storage it better. It was also more practical to do adjustments

 Expected positif:  
The angle is good now

Unexpected positif:

Expected negatif:   

Unexpected negatif:  when riding over it the system clicks a little bit because it has no basic under the edges. We adjusted this by the next prototypes

user test

We went to marc with this prototype to test it with him

His first impressions were good and he liked it.
But the uphill was to steep.
we had to make uphill side longer but have to take care that the total solution doesn't become to big.

prototype 13

Goal to test if the textile works

based on prototype 12

 Expected positif:  
The water tracks are gone after the installation.

Unexpected positif:

Expected negatif:   

didn't test it with wet front wheels

Unexpected negatif: 

prototype 12

Goal: to test if it works better with 5 wheels so that the front wheels doesn't get stuck inbetween the rolls

based on prototype 11

 Expected positif:  

tubes rolls in one direction

Tubes are strong enough

width is good

Front wheels doen't get stuck between the rolls

Unexpected positif:

the weight of the rolls helps to not move the system on the floor

not to much friction

Expected negatif:   

To high

Unexpected negatif: 

prototype 11

Goal: to test if it is better with steel rolls in sted of pvc rolls.

based on prototype 10:

Expected positif:  

tubes rolls in one direction

Tubes are strong enough

width is good

Unexpected positif:

the weight of the rolls helps to not move the system on the floor

not to much friction

Expected negatif:   

front wheels gets stuck inside

Unexpected negatif: 

to high

CURRENT PROTOTYPE

Before visiting to Marc we made a prototype with the real materials (part of them) with two possible solutions.

The prototype is composed of 3 or 5 metal tubes (it depends that he prefers), covered with a   fabric that absorbs the water and  ratchets bike to turn in a unique direction and also the structure has two ramps. The tubes form the diameter of the wheelchair wheels. 

The tube cover has six buttons to close it, and also is attached to the tube with velcro. 

            


Prototype with three tubes:

To reinforce the structure we made two triangles with the same angle as the ramp to be strong enough to support the weight of a person. 

The ratchets are attached to the tubes with epoxy and silicon and also are joined to the wall with bolts.  

                                   
With this movie we can se the prototype mistakes

1- The ramp is too much high, so is a bit difficult go to the structure. 

2- The distance between the ramp and the first tube is too much big, so the small wheels

get into the gap. 

3- The silicon and epoxy is not strong enough to join the ratchets .

                                    

Prototype with five tubes:

It has the same structure as the prototype with three tubes. 

Some mistakes are the space between the tube and the ramp is very little therefore the ratchets touch the ramp. 

POSSIBLE SOLUTIONS 

For the ramp, we made a little hole not to touch the ramp 

   

For the tubes we replaced the silicon for wood cylinders which are attached directly to the tube with bolts. 
These are introduced inside the ratchet with a hammer, so they are strong enough to support the movements.