Alternative design of carriage for Phineas 3DP.
It used 6 625 (5x16x5) bearing to replace the POM wheels.
It not only easier to find but also provide lower friction movement.
Good lubrication between the bearing and 1515 aluminum rob is necessary.
Other parts used.
M3x8 screw x2
m3x12 round head screw x6
M3x18 screw x 1
m3 hex nut x8
M3 prevailing torque hex nut x1
M3 spring washer x1
M4 x10 screw x2
M10 steel ball with M4 screw hole x2