JP2926499B2 - Scale shift method for inch type NC machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a scale shift method for an inch type NC machine in which an NC machine configured to be inch size is moved by a very small amount.

[Prior Art] NC machines exported to the United States are configured in inch specifications. In other words, the NC unit itself is a one-pulse 1μm with millimeter specifications
Or, it is configured to give a movement command of 0.1 μm, but with an NC machine of inch specification, 0.0001 ″ per pulse
(2.54μm) or 0.00001 ″ (0.254μm) function is provided. Therefore, when a one-pulse signal is issued from the NC unit, the X, Y, and Z axes of the machine are all in the smallest unit. It is common to move 2.54 μm or 0.254 μm.

[Problem to be Solved by the Invention] As described above, since the inch-type NC machine is configured, even if it is desired to move the machine by 1 μm or 0.1 μm from the reference point in the machine tool of the inch specification, for example, However, there was a problem that high-precision positioning could not be performed.

The present invention solves the above problems, and enables an inch-type NC machine to be able to move substantially by an amount smaller than 2.54 μm or 0.25 μm even in an inch-type NC machine, thereby enabling high-precision positioning. It is an object of the present invention to provide a scale shift method.

[Means for Solving the Problems] To achieve the above object, the present invention provides an inch-size specification.
An origin shift function to move the origin of the selected axis by one pulse of 2.54 μm or several pulses of several 2.54 μm is provided on the PC device of the NC controller of the NC machine, and this origin shift function is manually operated using MDI. It features a scale shift method for inch-size NC machines.

[Operation] The origin shift function is applied to the PC device. With this function, the origin is moved in the plus or minus direction by a unit of 1 μm or 0.1 μm by the manual shift of the toggle switch. By performing the operation control according to the inch specification at this position, it becomes possible to move the X, Y, and Z axes by a desired value.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a PC device 4 is provided between the NC device 2 and the NC device 3. The inch type NC machine 3 is configured to generate a signal for moving the NC machine 3 in the X, Y and Z axis directions by 2.54 μm in principle by a one-pulse command from the NC machine 2. In the PC device 4, an origin shift function 1, which is a main component of the present embodiment, is formed. Further, the PC device 4 is provided with an MDI 5 for manually operating the PC device 4 and an operation panel 6 for displaying the progress of the operation of the origin shift function.

FIG. 2 is an explanatory diagram for explaining the origin shift function in an easily understandable manner.

In the figure, the line AA is set as a reference position. If you want to move the NC machine 3 from this reference position by 0.54 μm, in the case of the conventional inch specification, 2.54 μm from here by one pulse
It moves to the P position which is far away. Therefore, the origin is moved by two shifts in the minus direction from the line AA by using the origin shift function 1. When the origin shift function is used, it is moved by 1 μm with one pulse, so that 2 shifts -2
The origin moves by μm. In this state, when returning to the original inch specification, 2.54 μm is sent by one pulse from the position of the BB line moved by −2 μm. Therefore, it has moved by 2.54-2 = 0.54 μm from the original reference line AA. That is, the NC machine 3 is 0.
It will move to point Q which is 54 μm away. Further, by applying the origin shift function 1 at the point Q, the NC machine 3 can be moved to a desired position.

FIG. 3 is a flowchart showing an outline of the operation of the origin shift function 1.

First, the workpiece is centered and the reference position is measured. Next, an M101 mode command is issued by MDI5 to enable the manual scale shift. That is, the operation of the origin shift function is enabled. Here, the lamp 7 of the operation panel 6 is lit in green to indicate that it is in an operable state. Set the mode selection switch (not shown) to manual and select the X, Y, and Z axes. Next, a plus or minus toggle switch 9
To give the required number of pulses. The NC machine 3 moves by 1 μm by one pulse, but the machine coordinate value is left as it is. The lamp 8 of the operation panel 6 lights up the shifted axis in yellow to indicate it.

Thus, the movement of the selected axis is completed. At this point, the M102 mode command is issued to invalidate the manual scale shift. That is, the use of the origin shift function 1 is stopped, and the original state is restored. Hereinafter, the NC machine 3 is moved by a predetermined control command.

As described above, according to the present embodiment, even the inch-type NC machine 3 can be finely moved, and high-precision positioning can be performed.

In this embodiment, one pulse of the toggle switch of the origin shift function is set to 1 μm, but a smaller value, for example, 0.
It can be 1 μm.

According to the present invention, the origin position can be moved using the origin shift function. As a result, even in the inch type NC machine, it is possible to perform a small movement smaller than 2.54 μm or 0.254 μm, and an effect that high-precision positioning becomes possible can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of an origin shift function, and FIG. 3 is a flowchart for explaining the operation of the embodiment. 1. Origin shift function 2. NC device 3. NC machine 4.
…… PC device, 5… MDI, 6… Operation panel.

Claims (1)

(57) [Claims] (1) The origin of the selected axis is set to 2.54 μm of one pulse or the number of several pulses to the PC device of the NC controller of the inch type NC machine.
A scale shift method for inch-size NC machines, characterized by providing an origin shift function that moves by 54 μm and manually operating this origin shift function using MDI.