G211. Inside thread milling cycle. Fagor CNC 8055 para otras aplicaciones, CNC 8055 para fresadoras, CNC 8055 for milling machines, CNC 8055 for other applications

Programming manual

9.17

G211. Inside thread milling cycle

This cycle may be used to make an inside thread through a helical movement of the tool.

Working in Cartesian coordinates, the basic structure of the block is as follows:

G211 G98/G99 X Y Z D I J K B C L A E Q

B

K

L

A

D

Z

G00

G01

M03

M04

G98

G99

I

9.

J

[ G98/G99 ] Withdrawal plane

G98 The tool withdraws to the Initial Plane, once the hole has been milled.

G99 The tool withdraws to the Reference Plane, once the hole has been milled.

[X±5.5] Hole center coordinate along the abscissa axis.

It defines the hole center coordinate along the X axis. If not programmed, it will assume the current tool position on that axis.

[ Y±5.5 ] Hole center coordinate along the ordinate axis

It defines the hole center coordinate along the Y axis. If not programmed, it will assume the current tool position on that axis.

[ Z±5.5 ] Reference plane

Defines the reference plane coordinate. It may be programmed either in absolute or incremental coordinates, in which case it will be referred to the starting plane.

If not programmed, it assumes as reference plane the current position of the tool.

[D5] Safety distance

Defines the distance between the reference plane and the surface of the part where the milling is to be done. If not programmed, it assumes 0.

[ I±5.5 ] Machining depth

Defines the threading depth. It may be programmed either in absolute or incremental coordinates, in which case it will be referred to the reference plane.

If not programmed, the CNC issues the corresponding error.

[ J±5.5 ] Thread diameter

Defines the nominal diameter of the thread The sign indicates the machining direction of the thread

(positive if clockwise and negative if counterclockwise).

If not programmed, the CNC issues the corresponding error.

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9.

Programming manual

[ K5.5 ] Thread depth

It defines the distance between the crest and the root of the thread. If not programmed, the CNC issues the corresponding error.

[ B±5.5 ] Thread pitch

Defines the thread pitch.

• With a positive sign, the direction of the thread pitch is from the surface of the part to the bottom.

• With a negative sign, the direction of the thread pitch is from the bottom to the surface of the part.

If not programmed or programmed with a 0 value, the CNC will display the corresponding error message.

[ C1 ] Type of tapping

Defines the type of tapping to be carried out. This parameter depends on the type of tool being used.

• When programming C= 0, the threading will be done in a single pass.

• When programming C=1, it will make one thread per each pass (single-edge cutter).

• When programming C=n (where n is the number of cutting edges of the cutter), it will make n threads per each pass.

If not programmed, a value of C=1 is assumed.

C=0 C=1 C>1

[ L5.5 ] Finishing stock

It defines the finishing stock at the bottom of the thread. If not programmed, a value of 0 is assumed.

[ A5.5 ] Maximum penetration step

Defines the maximum penetrating pass of the thread. If not programmed or programmed with a 0 value, it will run a single pass up to the finishing stock.

[ E5.5 ] Approach distance

Approach distance to the thread entry. If not programmed, it will enter the thread from the center of the hole.

[ Q±5.5 ] Thread entry angle

Angle (in degrees) of the segment formed by the center of the hole and the thread entry point with respect to the abscissa axis. If not programmed, a value of 0 is assumed.

CNC 8055

CNC 8055i

·M· & ·EN· M ODELS

S OFT : V01.6

X

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