GSK GSK980TDc, Manual

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GSK980TDc Turning CNC System User Manual
262
Ⅱ
Operation
(8/1000) (mm/min or inch/min)
。
λ value is determined by the current rapid override, and their relationship is:
Rapid override λ value Rapid override λ value
F0 1 25% 10
50% 100 100% 100
Rapid traverse speed is clamped at 100% speed when it exceeds 100%, i.e.:
[MPG pulse amount per 1 second]×
λ ×([No.241setting value]/100)×(8/1000) ≤ 1
2) Rapid traverse speed
Rapid traverse speed is clamped at the speed set by No.240, i.e.:
[Rapid traverse speed]
＝ [rapid traverse speed of each axis]×([No.240 setting value]/100)× [MPG
pulse amount per 1 second]× λ ×([No.241 setting value]/100)×(8/1000)
At the moment, when the speed by rapidly rotating MPG exceeds the clamped, the rapid traverse
speed is clamped at the setting value by parameter, i.e.:
[MPG pulse amount per 1 second]× λ ×([No.241 setting value]/100)×(8/1000) ≤ 1
8.3.3 Notes in MPG trial-cut mode
Pay more attention to the followings when the system is in MPG trial-cut mode:
1) Press in Auto mode and the CNC does not switch to MPG trial-cut mode; when the
CNC is in MPG trial-cut mode, it escapes the MPG trial-cut mode from the next block by
pressing the mode switch key;
2) When the system executes the MPG trial-cut control, the single block signal and the feed
hold signal are valid. When the single block or feed hold stops, the program execution state
is recovered to the MPG trial-cut control after the cycle start key is pressed.
3) Execution speed of blocks for movement and pause can be controlled by rotating MPG.
Their speed of blocks with M, S, T, F, i.e. without movement or pause cannot be
controlled(except for executing the tool offset in traverse mode) by rotating MPG which only
controls whether they are executed.
4) The spindle speed is not related to the MPG pulse. The spindle rotates with the commanded
speed even if the system is in the MPG trial-cut mode. For feed per rotation, reading the
current spindle speed is switched to the execution after feed per minute.
8.3.4 Temporarily invalid in MPG trial-cut mode
1) Executing screw cutting commands
In the course of executing screw cutting blocks (G32, G32.1, G33, G34, G76, G84, G88,
G92), the MPG trial-cut function is temporarily invalid with the speed under the override 100%,
and is valid in the next block again. The MPG control is invalid when the screw cutting is
executed actually, and it is valid in others.
2) Executing from the middle point to machine zero
In the course of executing the block (G28, G30) from the middle point to machine, the MPG
trial-cut is invalid temporarily and the block is executed with the speed under the override 100%,
and the next block is valid again.
3) Measuring related G commands execution with the override 100%
When the system measures the related G commands, the MPG trial-cut is invalid
temporarily, is executed with the speed under the override 100%, at the moment, execution of