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Increasing and decreasing OFFSET / WEAR on older CNC FANUC machines with U and W

Increasing and decreasing OFFSET / WEAR on older CNC FANUC machines with U and W

Many older FANUC system CNC machines, such as FANUC 0T, 6T, 10T, 11T, 15T and some models of 18T, do not have the + INPUT or INPUT CALC button for increasing or reducing the same Offset / Wear value as the newer machines.

Users who start learning CNC from newer machines may be surprised to find that the Offset screen of older machines does not have this function, but it does not mean that they cannot increase or decrease the Offset value, but only use a different input method.

---

Can older machines increase or decrease OFFSET / WEAR values?

The answer is yes.

FANUC has already designed an incremental input method for modifying Offset / Wear using the letter of the axis instead of pressing + INPUT.

For CNC lathes include

U is used for the X axis.

W Used for Z-axis

When entering a value and pressing INPUT, the entered value will automatically add or subtract the original value.

---

Principles of U and W

On a CNC lathe.

X and Z are Absolute position references.

U and W are incremental transition phase references.

The same principle was used to correct the Offset / Wear value of older FANUC machines.

Therefore, the user does not need to calculate a completely new value. Just specify the desired value to increase or decrease. The system automatically adjusts the original data.

---

Example of increasing the X-axis value

Suppose Offset was originally

X = -18.500

Need another 0.020.

Let enter

U0.020

INPUT

Results

X = -18.480

The system will add + 0.020 to the original value.

---

Example of X-axis devaluation

Suppose

X = -18.500

Want to reduce another 0.020

Enter

U-0.020

INPUT

Results

X = -18.520

---

Example of increasing the Z-axis value

Suppose

Z = 1.300

Want to add

W0.050

INPUT

Results

Z = 1.350

---

Z-axis reduction example

Suppose

Z = 1.300

Want to reduce

W-0.030

INPUT

Results

Z = 1.270

---

Always have to choose Offset right first.

Before entering U or W, make sure the Offset Number you want to correct must be selected.

If the wrong Offset is selected, the Offset value of the other tool will be corrected immediately. This can result in an error of task size when the tool is called next.

---

Note:

Entering a U or W value is an incremental correction of the current value.

Sample

U0.020

Doesn't mean

> Set Offset to 0.020

But means

> Add another 0.020 from the original value.

Likewise.

W-0.030

I mean,

> reduce the current value by 0.030.

Not a new setting to -0.030.

---

What's the difference between newer machines?

Many newer FANUC machines have + INPUT, INPUT + or INPUT CALC buttons.

The user simply enters a number and presses it. The system will automatically increase or decrease the original value without typing U or W.

Although the methods of use are different, the basic principle is that increasing or decreasing from the original Offset, only the newer machines are more convenient.

---

Summary

Fixing OFFSET / WEAR values on older CNC FANUC machines relies on increased input with U for X and W axes for Z axes instead of using the + INPUT button found on newer machines. Understanding this principle allows operators to adjust job size compensation accurately, quickly, and minimize faults from every new value calculation. It is also an important basis for those who have to work on older CNC FANUC machines that are still in use in many factories to date.

# FanucOffset

# WearOffset

# FanucOldControl

# CNCLathe

# CNCProgramming

3 days agoEdited to

... Read moreในประสบการณ์การใช้งานเครื่อง CNC FANUC รุ่นเก่า การเข้าใจวิธีการป้อนค่า Offset / Wear แบบ Incremental ด้วยตัวอักษร U และ W เป็นเรื่องสำคัญมาก เพราะช่วยให้เราปรับชดเชยขนาดงานโดยไม่ต้องคำนวณค่า Offset ใหม่ทั้งหมดทุกครั้ง วิธีนี้สะดวกและลดโอกาสผิดพลาดได้ดีมาก ตัวอย่างเช่น เมื่อพบว่าชิ้นงานมีขนาดผิดพลาดเล็กน้อยเพียง 0.020 มิลลิเมตร ผู้ใช้งานเพียงป้อน U0.020 หรือ W-0.030 แล้วกด INPUT ระบบจะบวกหรือลบค่าจาก Offset เดิมทันที ทำให้การตั้งค่ามีประสิทธิภาพและรวดเร็วขึ้นกว่าเดิมมาก สิ่งที่ต้องระวังคือ ก่อนป้อนค่า U หรือ W ควรตรวจสอบให้แน่ใจว่าเลือก Offset Number ที่ถูกต้อง เพราะการแก้ไขผิดเครื่องมือจะส่งผลต่อขนาดชิ้นงานอย่างรุนแรงในครั้งต่อไปที่เรียกใช้เครื่องมือนั้น นอกจากนี้ การรู้ความแตกต่างระหว่างเครื่องรุ่นเก่าและรุ่นใหม่จะช่วยให้ผู้ที่ใช้เครื่อง CNC FANUC ง่ายต่อการเรียนรู้และปรับตัว เครื่องรุ่นใหม่ที่มักมีปุ่ม +INPUT หรือ INPUT CALC จะช่วยให้ผู้ใช้ป้อนตัวเลขได้ตรงๆ แล้วระบบเพิ่มหรือลดค่าอัตโนมัติ แต่หลักการพื้นฐานยังเหมือนกันคือการแก้ไขค่า Offset แบบ Incremental จากค่าที่มีอยู่แล้ว สำหรับคนที่ทำงานในโรงงานซึ่งยังใช้เครื่อง CNC FANUC รุ่นเก่า การศึกษาวิธีใช้ U และ W อย่างเชี่ยวชาญจะช่วยเพิ่มประสิทธิภาพการทำงาน ทำให้การตั้งค่าและการปรับชิ้นงานเป็นไปอย่างรวดเร็ว ถูกต้อง และลดการเสียเวลาคำนวณหรือแก้ไขผิดพลาดซ้ำไปซ้ำมา จากที่ได้ลองใช้งานจริง พบว่าการปรับ Offset ด้วยวิธีนี้ช่วยให้เราทำงานได้ต่อเนื่อง ลดความผิดพลาดในการตั้งค่าเครื่องมือ และเพิ่มความมั่นใจในการผลิต พร้อมทั้งช่วยให้เข้าใจพื้นฐานที่สำคัญของระบบ CNC FANUC รุ่นเก่าอย่างชัดเจน ซึ่งยังมีประโยชน์มากสำหรับช่างกลึงและผู้ปฏิบัติงาน CNC ในทุกโรงงาน

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