machine lsp/400. automatic polishing machines with brushes for plates. the pieces can have a maximum length and width of 400mm. the plate is manually positioned on the slide and blocked by a vacuum device. pushing the 2 h......machine lsp/400. automatic polishing machines with brushes for plates. the pieces can have a maximum length and width of 400mm. the plate is manually positioned on the slide and blocked by a vacuum device. pushing the 2 hands button, the slide starts moving forward and backward thanks to an hydraulic cylinder while the working speed is adjustable during working operation. turning a selector the piece can oscillate or not. the working pressure is controlled by a gear reduction motor ad can be seen on an ammeter.the working time is controlled by a timer. at the end of the work, a new piece is settled after unblocking the previous one. the machine has been manufactured to execute 8 different working programs, depending on the requirements of the customer.