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Last modified by writer on 2023/09/12 15:31
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1 (% style="color:#a0be2d" %)//**G81 (X- Y- Z-) or (U- V- W-) R- L-**//
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3 The (% style="color:#a0be2d" %)//**G81**//(%%) cycle is designed for drilling.
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5 The cycle includes the following actions:
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7 1. Preliminary movement described in the section "[[Canned Cycles>>doc:Руководство пользователя.Описание G-кодов.Список G-кодов, поддерживаемых системой.G80-G89\: Постоянные циклы.WebHome]]".
8 1. Move the Z axis with the current feedrate to Z position.
9 1. The Z axis moves quickly to the return height along Z.
10
11 ====== Example 1 ======
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13 Suppose the current position (X1, Y2, Z3) and the following line of G-code is executed:
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15 (% style="color:#a0be2d" %)//**G90 G98 G81 X4 Y5 Z1.5 R2.8**//
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17 In the example, when the command is executed, the absolute positioning mode ((% style="color:#a0be2d" %)//**G90**//(%%)) and the mode of returning to the initial height in Z ((% style="color:#a0be2d" %)//**G98**//(%%)) are valid.
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19 The following movements will take place:
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21 1. Quick movement in the XY plane to the point (X4, Y5).
22 1. Fast movement along the Z axis to a point (Z2.8).
23 1. Moving along the Z axis at a given feedrate in (Z1.5).
24 1. Fast movement along the Z axis in (Z3).
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26 [[Command (% style="color:#a0be2d" %)//**G81**//(%%). Example 1>>image:image2019-6-4_14-4-45.png||alt="Команда (% style=" data-xwiki-image-style-alignment="center"]]
27
28 ====== Example 2 ======
29
30 Suppose the current position (X1, Y2, Z3) and the following line of G-code is executed:
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32 (% style="color:#a0be2d" %)//**G91 G98 G81 X4 Y5 Z-0.6 R1.8 L3**//
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34 In the example, when executing the command, the incremental positioning mode ((% style="color:#a0be2d" %)//**G91**//(%%)) and the mode of returning to the initial height in Z ((% style="color:#a0be2d" %)//**G98**//(%%)) are effective. The machine performs a drilling cycle three times. The initial position in X is 5 (= 1 + 4), the initial position in Y is 7 (= 2 + 5), the return height in Z is 4.8 (= 1.8 + 3), the target position in Z is 4.2 (= 4.8-0.6 ) The initial position in Z is 3.
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36 During the preliminary movement, a quick movement along the Z axis to the position (X1, Y2, Z4.8) is made, since the initial height in Z is less than the return height.
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38 The first iteration of the loop consists of 3 movements:
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40 1. Fast movement in the XY plane in (X5, Y7).
41 1. Moving along the Z axis at a given feedrate in (Z4.2).
42 1. Fast movement along the Z axis in (X5, Y7, Z4.8).
43
44 The second iteration of the loop consists of 3 movements:
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46 1. Fast movement in the XY plane in (X9, Y12, Z4.8).
47 1. Movement along the Z axis with a given feedrate in (X9, Y12, Z4.2).
48 1. Fast movement along the Z axis in (X9, Y12, Z4.8).
49
50 The third iteration of the cycle consists of 3 movements:
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52 1. Fast movement in the XY plane in (X13, Y17, Z4.8).
53 1. Movement along the Z axis with a given feedrate in (X13, Y17, Z4.2).
54 1. Fast movement along the Z axis in (X13, Y17, Z4.8).
55
56 [[Command (% style="color:#a0be2d" %)//**G81**//(%%). Example 2>>image:image2019-6-4_14-6-45.png||alt="Команда G81. Пример 2" data-xwiki-image-style-alignment="center"]]
57
58 ====== Example 3 ======
59
60 Suppose that the current position (X0, Y0, Z0) instead of (X1, Y2, Z3), and a line of G-code is executed:
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62 (% style="color:#a0be2d" %)//**G90 G98 G81 X4 Y5 Z1.5 R2.8**//
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64 Since the initial height in Z is less than the value of the parameter R, during the preliminary movement, the initial movement in Z will be performed.