B - Operations – Transporting – 23 – Q
Patent
B - Operations, Transporting
23
Q
341/100, 342/22.
B23Q 15/24 (2006.01) B23Q 15/12 (2006.01) G05B 19/4103 (2006.01) G05D 3/00 (2006.01)
Patent
CA 1099372
TITLE APPARATUS AND METHOD FOR CONTROLLING A MACHINE TOOL ALONG A CIRCULAR PATH ABSTRACT OF THE DISCLOSURE In a control apparatus for a machine tool, an interpolator circuit for determining whether or not one of the axis motors should be inhibited on the next step to maintain the tool closer to the desired circular path. The interpolator utilizes information as to the distance from the initial position of the tool to the center of the arc defining the path of travel and which axis is to be inhibited initially to determine when to inhibit. The main logic circuit in the control apparatus begins a move of the number of steps equal to the distance to be moved along the axis which represents the shorter distance between the initial point and the center of the arc. The interpolator presets a counter with that number of steps subtracted from the number of steps equal to the distance to be moved along the other axis and increments that counter by one each time the selected motor is inhibited. At the octant point, the main logic circuit adds the counter total to the number of steps yet to be moved and continues the move while the counter total is converted to its negative and the counter is incremented by one for each time the other motor is inhibited. When the main logic circuit determines that the all of the steps have been moved, the counter total represents any correction to be made. - 1 -
308479
Dana Corporation
G. Ronald Bell & Associates
LandOfFree
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