we have 3 systems for the back gauge of the machine, with manual back gauge (500 mm.) and backside numeric readout, motorized back gauge with frontal digital or nc readout, motorized back gauge with table of support and d......we have 3 systems for the back gauge of the machine, with manual back gauge (500 mm.) and backside numeric readout, motorized back gauge with frontal digital or nc readout, motorized back gauge with table of support and digital or nc readout (1000 mm.)