In the actual CNC machining custom, we will often find with a large tool plate milling surface, on the axis of the amount is not large, but the front half of the circle blade also under the chip and the back half of the circle blade simply can not scrape, or the front half of the circle blade after walking, the back half of the circle blade is still crazy cutting (cutting huge amount is not in the scope of this discussion), that is, the tool plate end face and X axis is not perpendicular, that is, the Z axis and X axis is not perpendicular, which in milling large plane around When receiving the knife is very obvious, the two knives in the middle of the receiving print is difficult to accept, and the usual precision mechanical parts processing method to test the spindle, is to use the X axis to pull out a straight vertical surface, and then the spindle on the sticky table wheel large circle, and then come up with the diameter distance within the table pressure difference, often qualified, how can this be explained?
In CNC machining custom, this is the wedge plate problem, imagine the table pressure data played in the static state, is in the transmission gear unloading, holding rail pressure plate holding dead state to play out. And CNC precision machining is the exact opposite, is driven by the transmission wheel column chassis running, holding the rail pressure plate completely loose under the circumstances. The operation of the chassis is affected by the different static pressure on the contact surface of the guide rail, including the horizontal guide rail and lateral line guide rail in two ways, which causes different friction in each part, the chassis has a twisting force when running, thus affecting the spindle above the deviation in verticality. Under normal circumstances, as long as the static pressure in each place is adjusted to the same, in the shunt of the static pressure pipeline, each pipeline has a connection out of the pressure gauge interface. If the problem cannot be eliminated, the position or thickness of the wedge plate should be adjusted.