Build Instructions

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• 1

  The Brush

  For the rotating brush i use an extra long radiator brush, be sure that the real brush has a minimum length of 700mm, after searching the webstores a while i found the right one. Cut off the handle and let the shaft project 20mm on both sides.

  The shaft of my brush has a diameter of 5mm, this fits perfectly in the bearings of the side parts.

  To prevent the slippage of the shaft i use a small alu tube with a shrink tube, the other side is fixed by the gear.

  Tip: If the bristles are too long the rotation will get very slow/off.

  In this case simply shorten them with an electrical hair cutter, as i have done :-)

• 2

  Frame

  Think beforehand how wide the crawler should be, or how wide the lanes are to move along. The length of the profiles and threaded rods depends on that, i use 700mm.

  Make sure that the profiles dip 1-2mm into the side panels

  Through the side panels and the profiles, the threaded rods (M6 or M8) are inserted and screwed from the outside.

• 3

  Gearbox for Brush

  The gearbox of the brush consists of 4 gears.

  For a better smoothness, the double gear is fixed with a piece of a brass tube (diameter 8mm) and screw M6.

  The other gear is fixed with a M4 screw and locknut.

  The brush gear is fixed with two M3 screws, do not forget to put the nuts in the gear wheel first.

  The motor is attached by M3 screws to the sidepart.

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