Due to the separator, unwanted words or words identical to the upper block can be omitted, but the corresponding separator must be retained (ie the number of separators for each block is equal). This format is better than the previous format and is often used in CNC devices with few functions, such as wire cutting machines and some CNC milling machines. The "3B" or "4B" format instructions used in CNC wire-cutting machines in China are typical fixed-sequence formats with delimiters. The general representation of its 3B format is:
BXBYBJGZ
Its specific meaning is as follows:
X | B | B | Y | J | G | Z |
x coordinate value | Separator symbol | y coordinate value | Separator symbol | Count length | Counting direction | Processing instruction |
The most commonly used is the word address block format (also known as the variable block format using address characters). In the program segment expressed in this format, each word is preceded by an address code for identifying the address, that is, various function words consisting of letters and data as described above, and thus the undesired word or the previous block The same words can be omitted. The words in a block can also be arranged out of order (but often in a certain order for programming convenience). Although this format has increased the address reading circuit, the programming is intuitive and flexible, easy to check, and the punching tape can be shortened, which is widely used in CNC machines such as cars and milling machines.
Program segments for word address format can often be represented in a general form. Such as:
N134 G01X — 32000Y + 47000F1020S1250 T16 M06 (1-1)If the formula (1-1) is written in the general form, it is:
N3G2X ± 23Y ± 23F4S4T2M2 (1-2)
In the middle
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