Single workhead electro-mechanical internal grinding machine with grinding spindle directly on cross slide

An electro-mechanical system constituting the sole means for controlling all of the relative movements between a rotatable workpiece in a single workhead grinding machine and a spindle connected to a grinding wheel, the machine including a multiple axis slide means comprising:

• (a) programmable controller means for presetting first and second sets of data to control the position and drive speed of the slide means;
• (b) feed control computer means for producing servo-drive signals in accordance with said sets of data;
• (c) means for interfacing said programmable controller means with said feed control computer means;
• (d) first and second electric motor driven screw actuator means connected to said slide means for driving said slide means in a first direction axially of the axis of rotation of the spindle and in a direction transverse to said first direction;
• (e) servo means for interfacing said feed control computer means and said electric motor driven screw actuator means and including first position feedback means and first speed feed-back means for controlling directional movement and speed of the slide means along the same axis as the axis of rotation of the spindle to cause the grinding wheel and slide means to be relatively positionable between a workpiece grinding position and a retract position;
• (f) said servo means further including second position feedback means and second speed feedback means for controlling directional movement and speed of the slide means in a direction transverse to the axis of rotation of the spindle when the grinding wheel is in said workpiece grinding position;
• (g) said servo means constituting the sole means for resolving movement of said slide means;
• said servo controlled first and second electric driven screw actuator means producing simultaneous control of coarse and fine movements of said slide means.