G94 callout

[Jayson Kramer]

Someone remind what this code does in a horz?

[Guest]

What do you want it to do?

 

 

 

G94 should cancel DPM feedrates(G93)

[Jayson Kramer]

thats what I thought basically inverse time cancel also. my post is putting it out in a drill cycle.

 

sample:

N904 ( 1/4 SPOTDRILL)

M98 P9899

T4M06

T5

G00 B180.

M98 P8101

G57 G00 X-2.7618 Y.469

S1069 M03

G43 H4 Z6.

G90

G94

G98 G81 Z2.687 R2.912 F1.07

X2.3858

G80

M98 P9899

[Guest]

I've seen Matsuuras that use a G93 and G94 on a tapping cycle to synchronize the ball screw and spindle.

 

could this be a remnant of bad coding that allows it to output on a drill cycle instead of only the tapping cycle?

[Jayson Kramer]

this could be true.

thanks John

[3rdstring]

G94 specifies IPM

(G95 specifies IPR)

 

Personally I like the G94 there. We have one machine that if its stopped in a tap cycle (using IPR) it doesn't default back to IPM & thatcan get ugly real quick.

[chris m]

This is true for sure; that's why I have G94 in my 'safety lines' at the beginning of each tool. I don't know jack about horizontals, but G94 in general is IPM feedrate as Chuck said. John is also correct that Matsuura uses G93 for IPR feed in tapping, or at least did in the Yasnac MX control days.

[gcode]

When they added the IPM/pitch tapping and IPM/IPR feed rate switches to mpmaster, they started forcing G94 as a saftey feature.

Most machining centers default to G94 and you can run one for years without ever knowing what its for.

The only thing I've had to deal with is operators whining about "weird" code

[Jayson Kramer]

quote:

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The only thing I've had to deal with is operators whining about "weird" code [Roll Eyes]

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Amen sir

[Guest CNC Apps Guy 1]

For tapping I ALWAYS post out IPR. That way I can change a spindle speed and and not have to calc the new feedrate.

 

JM2C

 

Jamy I'll be ther on monday and I'll kick you one of my posts for the Yoda.

[FLIPPER™]

quote:

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For tapping I ALWAYS post out IPR. That way I can change a spindle speed and and not have to calc the new feedrate.

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Never use to do this but when I started my business I started all new and the new post I now use and fanuc control does this now. At first I thought it was a mistake. Now I prefer it. Just as James said.

[Jayson Kramer]

Cool see you monday James.