EVK / EVM - Electronic sensor positioners
Strip edge guidance
For strip edge guidance, the HF alternating light receivers are moved either by means of an EVK receiver adjusting device to an externally defined reference position or automatically to the strip edge. For this purpose, an aluminium base plate is provided with a guide rail with an adjustable slide.
The adjustable slide accommodates a measuring and a reference receiver which are fastened by means of angle brackets and which allow easily adjusted, precise direction towards the 1000 Hz light source. The adjustable slide is driven by a DC gear motor, via a toothed belt. The control electronics including scaled regulating distance signal and electronic end-of-travel limitation are installed in the connection box which is laterally fastened to the adjusting device. The HF alternating light receivers are wired to this box through an integral cable conduit.
Strip centre guidance
For strip centre guidance, HF alternating light receivers on the drive and on the operator side are automatically adjusted by means of a receiver adjusting device EVM to suit the strip width. For this purpose, an aluminium base plate is provided with a guide rail with two adjustable slides.
The adjustable slide accommodates a measuring receiver and a reference receiver which are fastened by means of angle brackets and which allow easily adjusted, precise direction towards the 1000 Hz light source(s). The adjustable slides are driven by a DC gear motor, via a toothed belt. The control electronics including a scaled regulating distance signal and electronic end-of-travel limitation is installed in the connection box which is laterally fastened to the adjusting device. The HF alternating light receivers are wired to this box through an integral cable conduit. In order to ensure accurate measurement of the strip width, or when the strip width exceeds 2100 mm and also when remote adjustment of the strip centre position needs to be greater than ± 8 mm, two EVK receiver adjusting devices for edges are required!
