G76 Threading Cycle

Output G76 threading cycle

The postprocessor has two type of threading output, the standard G33 single point threading and the G76 threading canned cycle. Checking this box will activate the G76 threading canned cycles.

The G76 Multiple Repetitive Threading Cycle provides a complete threading operation with two output blocks of information. The controller interprets the data in these two block and generates the multiple passes required to cut an entire thread.

The first G76 block:

• G76 Ppppppp Qqqqq Rrrrr

• Ppppppp - the first two digits are the number of finish passes, the second two digits are thread pull out chamfer amount, the third two digits are tool nose angle.

• Qqqqq - specifies the minimum depth of cut per pass

• Rrrrr - specifies amount of stock to leave for the finish pass

The second G76 block:

• G76 Xxxxx.xxxx Zzzzz.zzzz Ppppp Qqqqq Rrrrr Fffff

• Xxxxx.xxxx - specifies the X end point of the thread.

• Zzzzz.zzzz - specifies the Z end point of the thread.

• Ppppp - specifies the single depth of the thread.

• Qqqqq - specifies the cutting depth of the first pass.

• Rrrrr - specifies the taper angle of the thread.

• Fffff - specifies the thread lead.

The following THREAD/AUTO command must be used to generate the G76 threading:

THREAD/AUTO[,LEFT-RIGHT][,IN-OUT],START,s, LENGTH,l,DIAMTR,d1,d2, INCR,s1[,s2][,ATANGL,a][,PULBAC,d,a][,BOTH][,PITCH,p] [,REPEAT,r] [,OPSTOP][,OPSTOP][,SELECT,s][,CLEARP,x,y] [,FEDRAT,f1,f2,f3,f4,f5] [,START,s,n][,TAPER,x,y,a]

See THREAD/AUTO

Prep/G-Codes

1st Output Block

Select the Prep/G-code for the first G76 threading block. Normally this is 76.

2nd Output Block

Select the Prep/G-code for the second G76 threading block. Normally this is 76.

Addresses

P Address

Select the letter address used for the P values in the G76 threading blocks.

Q Address

Select the letter address used for the Q values in the G76 threading blocks.

R Address

Select the letter address used for the R values in the G76 threading blocks.

F Address

Select the letter address used for the F values in the G76 threading blocks.

Output Formats - 1st Block

Set P Address Format

Set the first G76 block, P address format. The format sets the number of places each side of the decimal point to output and whether the address requires leading zeros, trailing zeros, a plus sign and a decimal point:

• A 33 format outputs the address with 3 places to the left and 3 places to the right of the decimal point.

• A 60 format outputs the address with 6 places to the left and no places to the right of the decimal point.

Set Q Address Format

Set the first G76 block, Q address format. The format sets the number of places each side of the decimal point to output and whether the address requires leading zeros, trailing zeros, a plus sign and a decimal point:

• A 33 format outputs the address with 3 places to the left and 3 places to the right of the decimal point.

• A 60 format outputs the address with 6 places to the left and no places to the right of the decimal point.

Set R Address Format

Set the first G76 block, R address format. The format sets the number of places each side of the decimal point to output and whether the address requires leading zeros, trailing zeros, a plus sign and a decimal point:

• A 33 format outputs the address with 3 places to the left and 3 places to the right of the decimal point.

• A 60 format outputs the address with 6 places to the left and no places to the right of the decimal point.

Output Formats - 2nd Block

Set P Address Format

Set the second G76 block, P address format. The format sets the number of places each side of the decimal point to output and whether the address requires leading zeros, trailing zeros, a plus sign and a decimal point:

• A 33 format outputs the address with 3 places to the left and 3 places to the right of the decimal point.

• A 60 format outputs the address with 6 places to the left and no places to the right of the decimal point.

Set Q Address Format

Set the second G76 block, Q address format. The format sets the number of places each side of the decimal point to output and whether the address requires leading zeros, trailing zeros, a plus sign and a decimal point:

• A 33 format outputs the address with 3 places to the left and 3 places to the right of the decimal point.

• A 60 format outputs the address with 6 places to the left and no places to the right of the decimal point.

Set R Address Format

Set the second G76 block, R address format. The format sets the number of places each side of the decimal point to output and whether the address requires leading zeros, trailing zeros, a plus sign and a decimal point:

• A 33 format outputs the address with 3 places to the left and 3 places to the right of the decimal point.

• A 60 format outputs the address with 6 places to the left and no places to the right of the decimal point.

Set F Address Format

Set the second G76 block, F address format. The format sets the number of places each side of the decimal point to output and whether the address requires leading zeros, trailing zeros, a plus sign and a decimal point:

• A 33 format outputs the address with 3 places to the left and 3 places to the right of the decimal point.

• A 60 format outputs the address with 6 places to the left and no places to the right of the decimal point.

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