Action is the actual value of detecting the position and speed of the workbench, and send feedback to the CNC device or servo device, so as to constitute a closed loop control. Detecting element are usually performed by using the principle of optical or magnetic detection of position or velocity.
Position detection device according to the non standard fasteners detection methods are divided into direct measuring element and the indirect measuring element. For machine tool commonly used while linear movement measuring linear detecting element, known as the direct measurement, posed by the location of the closed-loop control is called full closed loop control. Its measurement precision mainly depends on the precision of the measuring element and is not affected by the precision of machine transmission.
Due to the machine table of linear displacement and rotation Angle of Steel investment casting driving motor some proportional relationship, so can use the driver motor or ball screw rotation Angle method of indirectly measuring workbench mobile distance, this method is called indirect measurement, posed by the location of the closed-loop control is called the half closed loop control.
The nc machining accuracy depends on the detecting element and the precision of machine tool feed drive chain. Closed loop nc machine tools machining precision in the very great degree is decided by the precision of the position detection device, numerical control machine tool has very strict requirements to the position detection device, its resolution is usually between 0.001-0.01 mm or less.
Machining process matters needing attention:
1, the operator shall, in accordance with requirements of the regulations, if you want socket screw plug to leave the machine tool, so the air supply, power supply should be closed, can't keep the machine in a state;
2, machine tool can't overload, super performance, timely preventive maintenance and equipment maintenance;
3, cutting tool, workpiece should be properly loaded, and the contents of each clip should be solid, not heavy hammer; Should maintain sharp cutting tools, grinding tool, if the dull, or there is any breakage should be replaced immediately.
4, safety protection device cannot be taken apart, if not the device, the machine will not be used.
5, maintain a clean and tidy site, can't put the tool in Stainless steel foundry machine tool, workpiece or other sundry.
6, the machine tool operation situation, should pay attention to at any time, if there is any abnormality should immediately stop check.