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  #1  
Old Wed 27 August 2014, 18:31
Duds
Just call me: Dale
 
Canberra
Australia
Off vertical drilling

Is it possible to drill off vertical using a ball shaped bit and moving in the x and y axis while drilling down through the z axis?
Assuming only 3 axis machine
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  #2  
Old Wed 27 August 2014, 20:46
KenC
Just call me: Ken
 
Klang
Malaysia
Surely it can be done if you know your g-code well enough.
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  #3  
Old Thu 28 August 2014, 02:45
lonestaral
Just call me: Al #114
 
Isarn
Thailand
Send a message via Skype™ to lonestaral
Do you mean 'Ramping' or 'Spiral cutting'

Yes you can.
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  #4  
Old Thu 28 August 2014, 03:22
KenC
Just call me: Ken
 
Klang
Malaysia
I think he meant tilted straight holes.
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  #5  
Old Thu 28 August 2014, 05:30
racedirector
Just call me: Bruce #122
 
New South Wales
Australia
But I would think that was not possible with just a vertical Z due to the straight bit.... or am I not thinking correctly? I take what you're trying to do is make a hole at an angle with a straight bit......
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  #6  
Old Thu 28 August 2014, 05:38
Duds
Just call me: Dale
 
Canberra
Australia
I do mean tilted straight holes but not a straight bit. A ball bit. I can imagine that the angle is limited by the angle from the outside diameter of the ball and the shaft is the limitation of the angle.
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  #7  
Old Thu 28 August 2014, 05:41
lonestaral
Just call me: Al #114
 
Isarn
Thailand
Send a message via Skype™ to lonestaral
Hole at an angle with a drill, put a wedge under the work, simple.
This follows the K.I.S.S. principle

As an alternative,
Tilt the Z axis, not simple.
Build a 4 or 5 axis machine, not simple (with knobs on).
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  #8  
Old Thu 28 August 2014, 05:45
racedirector
Just call me: Bruce #122
 
New South Wales
Australia
Dale, that would probably but I can see the hole not being very deep. I would go with Al's idea, tilt the job and drill straight down, more room for a deeper hole.
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  #9  
Old Thu 28 August 2014, 06:46
Duds
Just call me: Dale
 
Canberra
Australia
Thanks, great idea tilt the work and drill with Z. Or use a jig outside the machine. I want the machine to solve all my joinery but it's a just a tool with some specific strengths and weakness. Thanks for the reminder.
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  #10  
Old Thu 28 August 2014, 08:06
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
Dale,
Possible, as long as the hole diameter and the minor diameter of the ball bit shank is small enough to hit the lip on the entry area of the plunge cut.

It's like cutting and "uncut" lip on some parts.

---question--- are you trying to do something like a pocket hole like a KREG jig?
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  #11  
Old Thu 28 August 2014, 08:08
ger21
Just call me: Ger
 
Detroit, MI
United States of America
Bruce, it'd just a straight line 3 axis move. However, the max angle would be limited, due to the tool being in the vertical orientation. Too much angle and the shank would hit the side of the hole.
Also, a ballnose bit isn't the best option for drilling.
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