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Numerical control lathe introduce return reference point

by:SNK     2020-08-27
CNC lathe return reference point the way to introduce release date: 2015 - 12 - 21 clicks: 2480 numerical control lathe to different points of the reference points according to the detecting element when the absolute method and incremental pulse encoder pulse encoder way two kinds, use absolute pulse encoder as the feedback element of the system, because the system position detection device on the battery when the power is to maintain the coordinates of the actual location of the memory, so in the normal use after machine installation and debugging process, as long as the backup battery effectively, absolute encoder pulse machine boot need not go back to the reference point to the operation. And using incremental pulse encoder system, due to the system after power, coordinate values of workpiece coordinate system is loss of memory, so the machine must be first after each boot back to the reference point, through the reference point to determine the origin of coordinates of machine tool, establish the correct machine tool coordinate system. The other machine after press the abrupt stop switch and machine failure and repair after operation needs a return reference point. Numerical control lathe way back to the reference point usually has the following five kinds: 1, axial reservation point direction fast movement, stop press zero switch after continue to forward movement, because of the grid method is to use pulse encoder or grating ruler point of reference for the signal of the grid to determine the pulse, so stop when the axis pressure zero after the switch, system began to query the pulse encoder or reference signal from the grating ruler, when the signal appeared, then stop coordinate braking control back to the reference point. At this point the location is the numerical control machine tool coordinate system reference point. 2, axial reservation point direction fast movement, stop press zero switch after continue to forward movement, until the stop from zero after the switch, the system began to query or pulse encoder grating ruler from the reference signal, when the signal appears, then stop coordinate braking control back to the reference point, then to locate reference points. 3, axial reservation point direction fast movement, stop press zero after the switch, the numerical control system and control axis brake to stop, and then reverse movement, when the block is zero release switch contact, system began to query or pulse encoder grating ruler benchmark signals, when the signal appears, then stop coordinate braking control back to the reference point, then to locate reference points. Direction fast movement, four, axial scheduled stop press zero after the switch, the numerical control system and control axis brake to stop, and then reverse movement, when the block is zero release switch contact, and then back to zero point switch, stop again after zero under pressure switch, the system began to query or pulse encoder grating ruler from the reference signal, when the signal appears, then stop coordinate braking control back to the reference point, then to locate reference points. 5, axial reservation point direction fast movement, stop press zero after the switch, CNC system control coordinate braking stop, then reverse the movement, until meet reference point pulse signal, shaft brake. In order to avoid the back reference points may be produced in the process of machine tool clearance, the axis and continue to slow motion to the reference point.
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