Change drill cycle into broaching operation?

[McLaren]

Greetings everyone. I was wondering if someone could help me modify a drill cycle to broach. My problems so far are changing the M03 into an M19, right now I just force it back inside the cycle, and making it call the g91 loop line at each position. This is what I have so far..

 

code:

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fmt  X  2   peck_size   #Broaching shift amount

fmt K 4 peck_qty #Broaching steps

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code:

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pmisc2          #Canned Misc #2 Cycle (User Option) (Broach)

peck_size = peck1

peck_qty = shftdrl

n, "M19", e

pdrlcommonb

pcan1, pbld, n, *sgdrlref, *sgdrill, pxout, pyout, prdrlout,

pfzout, pcout, *feed, strcantext, e

n, "G91", peck_size, peck_qty, e

pcom_movea

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And this is what it posts out..

 

code:

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N6G0G17G40G80G90S50

T6M6(0.1300 BROACH )

G8P1(FEED RAMPS ON)

G0G90G54X1.126Y-2.452M3

G43H6Z5.241M8T1

M19

G99G81R5.241Z4.467F30.

G91X.002K49

X3.126

X5.126

X7.126

G80

M9

M5

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Thank you in advance for any and all replies.

[Rob @ Target Machine]

Assuming you're looking to output "G91 X.002 K49" at each position, you'll need to add your code to pmisc2_2 postblock.

 

pmisc2 outputs for the first point and pmisc2_2 outputs for each subsequent point.

 

*Note that broaching in a CNC is not a good idea. Your spindle will suffer. Rotary broaching is the method of choice.*

[Mike Mattera - TFM]

Remind me not to buy any used machines from your company

 

Mike Mattera

[McLaren]

Thanks for the info guys. I mentioned to the bosses what you said and they didn't believe me. Anyone else want to chime in with your thoughts on M19 broaching on a vertical mill?

Almost forgot, I talked to Slater Tools and they said they can't do a rotary broach for my application. It's a single slot through the edge of a threaded hole.

[Zoober]

quote:

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Anyone else want to chime in with your thoughts on M19 broaching on a vertical mill?

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Do you like square spindle bearings?