GSK 988T, User Manual

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GSK988T Turning CNC System User Manual
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Ⅱ
Operation
And press to select the movement axis. When MPG rotates
one graduation, the minimum distance of the tool traverse is the minimum input increment. When
MPG rotates one graduation, the tool traverse distance can be magnified 10 times or one of two
overrides is set by parameters #7113 and #7114.
MPG feeding steps:
1. Press to access MPG mode;
2. Press to select the axis which is moved by one machine;
3. Press to select the override of the machine movement. When
MPG rotates for one graduation, the minimum distance traversed by the machine is the product of the
minimum input increment multiplying the current override. The override set by can be
rewritten by parameters #7113 and #7114;
4. Rotating MPG machine moves along the selection axis, MPG rotates for 360° and the amount
of the machine movement is that of 100 graduations.
MPG feeding direction is set by MPG rotation direction. Normally, MPG CW feeds positively,
CCW negatively.
The above is just one example; refer to the manual provided by the machine manufacturer during
actual operation.
Note 1: In JOG mode (JHD), MPG is valid;
In JOG mode, whether MPG can be used, which is set by parameter JHD (the 0 bit of #7100), when parameter
JHD (the 0 bit of #7100) is set as 1, MPG feeding and increment feeding are both valid.
The corresponding relation is shown as the following list:
JHD=0 JHD=1
JOG mode MPG mode JOG mode MPG mode
JOG feeding O × O ×
MPG feeding × O O O
Increment feeding × × × O
O: Valid
×: Invalid
Note 2: The commands of MPG exceed the rapid traverse speed (HPT);
The parameter HPT (the 4th bit of #7100) is stipulated as below:
Setting to 0: When the feedrate is limited by the rapid traverse speed, the impulse value exceeding the rapid
traverse speed is invalid. (The amount of machine movement doesn’t comply with MPG
graduation).
Setting to 1: The feedrate is limited by the rapid traverse speed, and the impulse value exceeding the rapid
traverse speed is valid, but it is accumulated in CNC. (Although MPG isn’t rotated, the machine
can’t stop. After MPG stops, the machine still moves due to the effect of CNC pulse.) The
allowable value of the memory capacity is set by parameter #7117, then, the part exceeding the
memory capacity is ignored.
Note 3: Axial movement direction and MPG rotation direction:
Parameter HNGx (the 0 bit of #7102) switches into MPG direction which the tool traverses along the
axis and it corresponds to MPG rotation direction.