Automatic Ronzani polishing machines are built to process sheets of width from 1500 mm to 2000 mm and of length up to 12500 mm for the FIXED BENCH series, and length up to 5000 mm for the MOBILE BENCH series. The two versions have in common the mechanical arrangements and the polishing roller-brush, but differ as to the structure of the sheet carrier, base frame and fixed sheets with movement of the roller-brush on the first, and of the bench and sheet with the roller-brush stationary on the second.

The general characteristics are as follows:

• Base frame with rails and rack for fixed bench machine travel, base frame with telescopic slide for mobile bench machines.

• Sheet decks in MDF panels of 30 and 18 mm thickness, arranged for installation of suction pads.

• Mobile polishing machine on wheels, or bench travel, with variable speed drive by an Inverter, gearbox and motor, rack and pinion. Travel control using an encoder and programmable counter.

• The motor-roller assembly is carried on a lever support with vertical travel driven by a slide and screw, to allow adjustment of the roller pressure, as a function of the current taken by the brush motor. On request, a hydraulic cylinder can be supplied fitted to allow rapid roller approach and retraction, while still maintaining the adjustment by the screw system.

• Asynchronous brush motor with fixed speed, or Direct Current motor with variable indicated speed.

• The motor-brush transmission employs a set of V-belts with an axially alternating shaft support assembly and tie-bars. The stroke and frequency can also be adjustable.

• Slide with comb for brush maintenance and cleaning.

• Suction hood

• Centralized lubrication for the rack and pinion, alternating sleeves, roller adjustment slides.

• Sheet locking with suction pads, complete with integral suction unit, pads, flexible hose tray and supports.

• Polishing paste distribution system, with a pressure tank, high-pressure pistols, solenoid valves, hoses and supports.