drill cycle transitions

[somename75]

I have a family of parts that I have to make on a newer Fadal. There are a huge number of holes in each part, so I am trying to find a way to squeeze more cycle time out of them becuase they are going to be pretty high volume soon. There is a lot of time being wasted in re-positioning between holes and I was thinking that it would a lot quicker if there was an arc move that positioned the machine from one hole to another. In other words I am trying to get away from drill, move straight up in z, stop, move in x and y, stop, then down in z. Anyone have any ideas ? Thanks in advance

[Guest]

You're in rapid, no feed move is going to be that fast.

 

Just make sure your hole to hole movements are the least amount of distance, keep your retract heights to a minimum, make sure your spindle is wound up and use the maximum feed rate your drill can give you. If you can accomplish these holes in G81 just pop'em through 1 at a time.

[?Mark]

I hope you got coolant thru...

[Guest]

quote:

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I hope you got coolant thru...

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Mark, it IS a Fadal, you really think they can get the chimp to xxxx down the tube?

 

[robk]

+1 John.

Are rapid moves really what is slowing you down?

What are you cutting and how deep? What kind of tooling are you using? How many holes is a lot of holes?

[Rick Henrickson 65]

if the holes are close together feed would probably be quicker! the acc and dec and loop back time take to long. program it at a high feed between hole see what it is reaching in actual feed and slow feed to that. I should specify close I guess but its hard really depends on machine but I would think on "FATAL" a 1/4 to 3/8 might be close. remember a fadals rapid is probably only 787 ipm.

[Rick Henrickson 65]

Oh and if you do have to peck do to material or depth consider changind your peck to get rid of 1 or 2 pecks the time savings is huge. on alot of holes

[somename75]

I couldn't agree more that this machine is a pos, but it is all I have to work with for the time being. I am using a 3 flute drill at 40ipm, because I need a very good finish, and need to hold +- .0005 on the dia. There is no thru coolant. I was hoping to be able to combine the xy and z moves from one holes R plane to the next holes R plane. Thereby eliminating the need for Z to stop, then xy to move then stop, then z start again. I hope that helps explain things a bit better, thanks for all your replies and suggestions, any more ideas would be awesome

[?Mark]

[somename75]

I forgot to add, that the hole is only .375 deep, and there are no pecks

[robk]

What material? What Ø?

[?Mark]

quote:

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at 40ipm

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You're doing really well here

[robk]

quote:

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40ipm,

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I gotta learn how to read. I thought sfm not ipm

[Rick Henrickson 65]

the thing is I am sure you ar eusing a drill cycle? the z is going to return to the r plane no matter what then move x, y

[Zoober]

Have you tried putting a G2/3 XYIJ in the lines that move hole to hole in you're drill cycles?

 

I know for a fact that it worked on the older Fadal's. We used to do goofy stuff like that for Westec and Santa Clara shows........

[Roger Peterson]

backplot

save as geometry on level xxx

put fillets in appropriate places

3d contour

change at point to change feedrates

 

voila!... maybe?

 

 

HTH

[Kyle Waters]

I don't know anything about Fadal's, but if it's only 3/8" deep, you may be far better off skipping the canned cycles altogether. If you can keep the maximum feed going between holes, you could end up cutting some time.

[Roger Peterson]

Kyle is correct also, if you tell your post to output the code longhand it will run faster than if it was output as a canned cycle. Significantly faster if there are a lot of holes.

 

But that will not put fillets in the corners to get away from the right angle moves. Saving your backplotted motion as geometry and then editing it to put fillets in and doing a 3D contour will probably yield the fastest run time. You will need to use change at point to modify feedrates and change between G1/G0 moves.

[somename75]

Awesome, thanks for all the help guys, I will let you know how it goes when I test it out.

[Thad]

quote:

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Have you tried putting a G2/3 XYIJ in the lines that move hole to hole in you're drill cycles?

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Robert, can you give me some sample code? You're not talking about a drilling cycle for each hole location, with an arc move in between, are you? Otherwise, the positioning moves are built in to the canned cycle.

 

Thad