JPS635409A - Digitizing method - Google Patents

Abstract

PURPOSE:To reproduce a positioning path using digitized data and shorten the length of a prepared NC tape by taking in the present position of a contact and digitizing every time positioning by NC function is completed. CONSTITUTION:A program including positioning data that positions a contact TH of a digitizing system and copying data that specifies copying operation is executed, and the position of the contact TH is controlled, and positional data of the contact TH is taken in and digitized. It is judged whether the program data is positioning data or not, and in case of positioning data, the contact TH is moved along positioning paths PT1, PT2 shown by dotted lines basing on NC function of a digitizer. By completion of positioning by the positioning data, block contacts PS1-PS2... that determine present position of a contact PT are taken in and digitized.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a digitizing method, and particularly to a digitizing method for a digitizer having an NC function and a tracing function.

<Prior art> The position of the contact is controlled by executing a program containing positioning data for positioning the contact at a predetermined point and tracing data for specifying the tracing motion, and the position of the contact is controlled as it moves along the model during tracing control. NC that captures position data at predetermined intervals and digitizes the three-dimensional shape of the model.
There are digitizers that have a tracing function and a tracing function. In fact, the position data is stored only when the value corresponding to the examined position data exceeds a permissible value.

By the way, in conventional digitizers, position data of a contactor is captured and stored only during tracing control. In other words, no digitizing is performed while the contact is being positioned based on the positioning data, and thus conventional methods can only obtain the three-dimensional shape of the model.

<Problems to be solved by the invention> By the way, the fifth problem
Referring to the figure, in multi-step profiling, movement from the end point PILL of one profiling process (surface reciprocating profiling of model MDLI) to the starting point P5° of the next profiling process (surface reciprocating profiling of model MDL2) is performed by positioning using the NCi function. be exposed. For this reason, in the conventional digitizing method, it is not possible to sample the position of the contact TH during positioning in multi-step tracing, and the second
The result is that the position data of the process tracing starting point P62 is stored. Therefore, using the data obtained by digitizing using the conventional method while performing multi-step tracing, NC
When the data is created, the tool moves from the profiling end point PE + of the previous process to the profiling start point P of the next process between each profiling process.
N that moves linearly to s2 (see dashed line PT)
C data will be created, and the tool may interfere with the workpiece, or f! The object may collide with the obstacle OB shown by the four lines, and the conventional method has the problem that digitizing processing cannot be performed while performing multi-step tracing.

In view of the above, an object of the present invention is to provide a digitizing method that can digitize position data of points in a positioning path even during positioning.

Another object of the present invention is to provide a digitizing method for specifying a positioning path by digitizing the end points of each block constituting the positioning path.

Means for Solving Problems> FIG. 1 is an explanatory diagram of the present invention in which digitizing is performed while performing multi-step tracing. .

TH is the contact, MDLI is the model in the first tracing process, MDL2 is the model in the second tracing process, PTI
, PT2 is the positioning passage, TI.

T2 is a walkway.

Function> A program containing positioning data for positioning the contact TH at a predetermined point and tracing data for specifying the tracing operation is executed to control the position of the contact TH, and the position data of the contact is captured and digitized. This is a digitizing method.

Identify whether the program data is positioning data,
In the case of positioning data, the positioning paths PTI, P indicated by dotted lines on the contacts TH are based on the NC function of the digitizer.
When the contact is moved along T2 and the positioning is completed based on the positioning data, the current position of the contact, in other words, the block end point (P, , P, , P2.
Ps□) and digitize it).

Also, if the program data is model data, model M
DLI or model MDL2 is traced, and normal digitizing is executed in parallel with the trace.

<Embodiment> FIG. 2 is a block diagram of a device (digitizer) that executes digitizing processing according to the present invention.

In the figure, 1 is a processor, 2 is a ROM that stores a control program, and 3 is a RAM that stores a tracing program and digitized position data.

In addition, the tracing program data can be roughly divided into contactor TH
It is divided into positioning data for positioning, and profiling data for specifying the profiling operation, and the profiling data includes "profiling method", "profiling processing conditions", and "profiling area".
Contains data that identifies the

4 is a data memory, which stores a plurality of machining condition data P11.
”l□,... and multiple tracing area data L,
, L, □, etc., 5 is a working memory that stores the current machine position (X, Y, Z,), processing condition data of the tracing process, area data, etc. 6 converts the speed data (digital values) in each axis direction commanded from the processor 1 into an analog speed signal 8,
DA converter that converts to v7 and v2, 7 is an operation panel,
A device for setting machining condition data and area data and inputting other operation commands, 8 is a pulse distributor, 9 is a displacement tool for each axis output from the tracer head TH ε, ε7, ε
10 is a current position sister that stores the current position X1, Yo, Z of each axis, 11X, 11Y, 11Zlj X-axis, Y-axis, Z-axis servo circuit, 12x to 12Z are X-axis, Y-axis, and Z-axis motors, and 13X to 132 are pulse generators that generate 1 (11 pulses X, Y, Z) each time the corresponding morph rotates by a predetermined angle.

Data memory 4 stores each tracing method (surface 1 direction tracing,
(surface reciprocating tracing, contour tracing, etc.)
i is memorized, and one machining condition data Pij allows the profiling plane, profiling speed F, approach speed F1,
The reference displacement amount C0, tracing direction, big feed amount P, big feed direction, etc. are specified, and the boundary position coordinate values of the tracing area in each axial direction are specified using one tracing area data Lij.

FIG. 3 is a flowchart of the process of the present invention, and FIG. 4 is an explanatory diagram of digitizing conditions. The digitizing process of the present invention will be described below with reference to FIGS. 1 to 4.

(1) When the button on the operation panel 7 is activated to activate the processor 1, the processor 1 reads one block of the tracing program stored in the program memory 3 in advance.

The tracing program specifies multi-step tracing, and is structured as follows.

G91 GQOXxs, Yy98, Zz,;
(A) GQO1Z-OP31 L32. (B
)GQO3P34 L34; (C)G9
1 Goo Xx, Yy, Zz! GOOXx2Yy
2 Zz2 (D)GoOXx,,Yy,,ZZS
□; GQO1・・・・・・・・・・・・ (E) GQO3
P35 L35. (F)G91 Go
o Xx3Yy3 Zz3H(G)GQO1...
・・・・・・・・・ (H)GQO3P2OL36.
(I)Mo2;
(J) However, during the program, (B), (E
), (H) is an approach command block, and the G function command "G901" means an approach command,
"Z-0" means an approach in the -Z-axis direction, and "P31" and "P32" specify the feed speed, deceleration position, etc. during the approach, respectively.

Also, blocks (C), (F), and (1) are the first
This is a block that specifies the profiling method, profiling processing condition data, and profiling area data in the profiling process, second profiling process, and third profiling process. Surface reciprocating profiling is instructed by "GQO3", and P34 to P36, L34 to L3
6, the pattern machining condition data and the single machining area data are respectively specified. Blocks (A), (D),
(G) is positioning data for positioning the tracer head TH to the tracing start points "81", 92, etc. (see Figure 1) for the first, second, and third tracing steps, and 'G91n
The absolute command is specified. Block (K
) is an M function command indicating the end of the program.

(2) The processor 1 checks whether the read program data indicates the end of the program, and if it indicates the end of the program, ends the process.

(3) However, if the program is not at the end, check whether the data is tracing data or positioning data. Note that if rGOQJ is included, it is positioning data and must be included.

(4) If it is positioning data, the processor 11 calculates the amount of movement (incremental value) in each axis direction based on the positioning data, and inputs the incremental value to the pulse distributor 8. The pulse distributor 8 executes a pulse distribution calculation based on the input movement amount of each axis, and distributes the distribution pulse
c, Ye, and ze are input to each axis servo circuit 11x to 112. As a result, 1-Racer Head (Yo Point P9
1. When the tracer head moves, pulses X, Y, Z are generated from the pulse generators 13X, 13Y, and 132 and applied to the current position register 10, and the following equation % is calculated depending on the direction of movement. The current positions X1, Y, Z are updated.

(5) Processor 1 checks whether positioning is completed using a well-known method.

(6) When the positioning is completed, the processor 1 reads the current position of each axis X1, Y, Z, from the current position register 10.
is read and stored in the RAM 3 (digitizing), and then jumps to step (1) to read the next program data and repeat the subsequent processing.

(7) - On the other hand, if the program data is tracing data in the determination process of step (3), the data indicating the “trailing method”, “trailing processing conditions”, and “trailing area” included in the tracing data is used to disseminate information. Execute the pattern.

It should be noted that by executing the tracing, the contactor TH moves and generates pulses X,, Y, from the pulse generators 13X to 132.

When zf occurs, the current position register 10 counts the pulses, thereby determining the current position of the contact (X, .

Y, , Zs) are monitored in real time.

(8) Processor 1 monitors the time t after the tracing execution,
Check whether t≧ΔT (ΔT is the sampling time).

(9) When the sampling time comes, the processor 1 reads the current position of the contact (X,) from the current position register 10.

Read Y, , Z,).

(Next, the processor 1 checks whether the predetermined value corresponding to the current position is greater than or equal to the allowable value.

(10a) For example, if the latest two points already digitized in FIG. 4 are Q L p Q2 # and the sampled position is Q, calculate the distance d from point Q1 to straight lines Q and Q2.

(10b) Next, the distance d is compared in magnitude with a preset tolerance value A. If d is less than the allowable value, the sampled current position is not digitized ((stored in RAM 3) () step (7)).
Repeat the following process.

(11) If t, d>A, in other words, if the distance d exceeds the allowable value, read the vine position data from the current position register 10 (X, # Y, j Z,) eRAM3
(digitize).

After that, check whether the tracing is completed and repeat the process from step (7) until it is completed.
When the process is completed, the process jumps to step (1), reads the next profile data, and repeats the subsequent process.

<Effects of the Invention> As described above, according to the present invention, in the case of positioning using the NC function, the current position of the contact is captured and digitized every time positioning is completed. The positioning path during digitizing can be regenerated, and only a minimum number of points need to be digitized, saving memory and reducing the length of the NC tape produced.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the present invention that performs digitizing while performing multi-step tracing. Figure 2 is a block diagram of the digitizer of the present invention. Figure 3 is a flowchart of the process of the present invention. Figure 4 is the digitizing conditions. Explanatory diagram: FIG. 5 is an explanatory diagram of conventional defects. TH...Contactor, MDLI...Model in the first tracing process, MDL2
...Model, PTI, PT2 in the second tracing process
・Positioning passage, TI, T2... Tracing passage Patent applicant Fanuc Co., Ltd. Agent Patent attorney Chiki Saito Figure 1 Figure 4 Figure 5 DL2

Claims (1)

[Claims] The position of the contact is controlled by executing a program including positioning data for positioning the contact at a predetermined point and tracing data for specifying a tracing operation, and the position data of the contact is taken in and digitalized. In a digitizing method for a digitizer having an NC function and a tracing function, identifying whether program data is positioning data, and if it is positioning data, executing contact positioning control based on the NC function; A digitizing method characterized by capturing and digitizing position data at a positioning completion point.