In the animation shown below what can be the mechanism used for this purpose? I know it can be achieved by using rack and pnion gear arrangement. But how are this set up arranged in classroom environment, I have no little idea. Please help me about this mechanism. And what can be best suitable material for this wiping action Thanks Video link: https://youtu.be/VB3FGRPSqsI blackboard clearner

  • $\begingroup$ ROFL If that is a board cleaner, all I can say is the engineer went lunar buggy on it. $\endgroup$ Sep 6, 2020 at 16:37
  • $\begingroup$ Yes it's a board cleaner, similar prototype kink: youtu.be/sShy2FVXS6g $\endgroup$
    – Satya
    Sep 6, 2020 at 16:43
  • $\begingroup$ Linear motors with a bunch of erasers is not the video you have above. $\endgroup$ Sep 6, 2020 at 16:46
  • $\begingroup$ I have attached the link for the video which is there in the question. $\endgroup$
    – Satya
    Sep 6, 2020 at 16:47
  • $\begingroup$ Even both the video uses same mechanism, I guess $\endgroup$
    – Satya
    Sep 6, 2020 at 16:48

1 Answer 1


that is a scanner that converts the writing on the board into a digital file for remote sharing, and then erases the board.

These devices use either a rack-and-pinion gear arrangement with the rack running along the top edge of the board, or a flexible cable-and-pulley system with an electric motor coupled to the pulley through a set of reduction gears.

You can get an excellent idea of how the cable-and-pulley systems work by taking apart an inkjet printer and studying the print carriage transport mechanism; almost all inkjet printers use this arrangement to move the printhead across the paper surface.

  • $\begingroup$ Sir i think it's a blackboard cleaner, there are lots of similar prototype on YouTube like: youtu.be/sShy2FVXS6g $\endgroup$
    – Satya
    Sep 6, 2020 at 16:44
  • $\begingroup$ @Satya it first scans the image then cleans it - how did you miss that? $\endgroup$
    – Solar Mike
    Sep 6, 2020 at 17:56
  • $\begingroup$ I missed it because the video clip is too short, will edit my answer. $\endgroup$ Sep 6, 2020 at 18:16

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