HmT Mechatronics partnered with Petrel Engineering (mechanical engineering company based in Cape Town and Durban) to design & produce two advertising units that would rotate and stop at four different positions (90deg apart), each displaying a different advertisement. The dwell time for each advert on display, along with rotational speed, needed to be adjustable by the operator. The unit must also be able to supply power to the advertising board’s LEDs to make night time visibility possible. When any given side had no advertisement present, the option to bypass any “zone” by selection had to be possible.
To solve this problem, we incorporated a 0.25kW three-phase motor in conjunction with a inline bevel gearbox and VSD to turn the unit. A timer/counter was used alongside proximity sensors to detect its current position. The latter enabled the user to set the rotational speed as well as displaying dwell time intervals.