## What is P in G76 cycle?

The ‘P’ word on the second line is the depth of thread in microns and the ‘Q’ defines the depth of the first cut. Finally, we tell the control the pitch of the thread using the ‘F’ value. With the G76 active the machine knows that we are using feed per revolution and not feed per minute.

**What is G76 threading?**

The G76 canned cycle can be used for threading both straight or tapered (pipe) threads. The height of the thread is defined as the distance from the crest of the thread to the root of the thread. The calculated depth of thread (K) is the value of K less the finish allowance (Setting 86, Thread Finish Allowance).

**Which code is used for threading cycle?**

Most of the cycles on a CNC Lathe are wrongly call Canned Cycles. The correct name for a cycle like G76 Threading Cycle and G71 Roughing Cycle is a Multi Repetitive Cycle.

### What is use of G75 canned cycle?

The G75 canned cycle can be used for grooving an outside diameter. When a Z, or W, code is added to a G75 block and Z is not the current position, then a minimum of two pecking cycles occur. One at the current location and another at the Z location. The K code is the incremental distance between Z axis pecking cycles.

**How do you calculate taper thread?**

The Taper rate of tapered pipe threads is 1 in 16. The angle between the taper and the center axis of the pipe is tan−1(1⁄32) = 1.7899° or 1° 47′ 24″. The pipe thread taper angle is double the inclination angle or 3°34′47″.

**How is thread depth calculated?**

Since the width of the thread and circumference of the bolt are known, we can calculate the number of threads. Now we know the pitch of the threads and the number of threads, so we can calculate the threaded depth. As it turns out, this can usually be simplified to Threaded Depth = 1.5 x Diameter.

## What is G90 in CNC?

The G Code G90 is used to define the absolute positioning system. When G90 is active the machine will read all dimensions and movements from the working datum position. 0; then the machine would move 100mm in the plus direction from the datum in both the X and Y axis. If we were to enter G00 X0. 0 Y0.