Program for drilling ovals

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ijohn83
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Re: Program for drilling ovals

Post by ijohn83 »

I was just wondering if this program could be used to calculate a modification in finger pitches?

My finger pitches were:

Middle finger = 1/4 forward & 1/4 left
Ringer finger = 1/4 reverse & 5/8 right

I need to take some pressure off my middle finger joint but want to keep the same fit adjustment that Mo gave me to give me more tilt.

I've told my driller to change each of my fingers 1/8 reverse only. That would make them:

Middle finger = 1/8 forward & 1/4 left
Ringer finger = 3/8 reverse & 5/8 right

Since I am "C" on the finger fan chart (24deg.) that adjustment only would change the laterals, also, from my CLT comfort positions.

If I could plug in the 24 degrees offset and the 1/8 finger reverse change into your program to tell me how much to tell the driller to change the laterals to maintain what I currently have that would be cool.

~John
Right Handed
MF - 4 1/8, 1/4 L, 1/8 Rev.
RF - 4 5/16, 5/8 R, 3/8 Rev.
Thumb - 3 1/8" Long, 7/16 Rev, 1/8 R, 47 Deg. oval (27/32 x 1)
PAP: 5 3/4 x 3/4 up
Speed: 18.0 off hand
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2y2
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Re: Program for drilling ovals

Post by 2y2 »

I'm not quite following, could you draw what you want to acheive? My guess is that giving the correct angle in the oval angle field we can get a good result but I need to understand it clearly first.
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ijohn83
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Joined: October 1st, 2010, 7:48 am
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Positive Axis Point: 5 3/4 over x 3/4up
Speed: Off the hand: 17.0 MPH
Rev Rate: 200
Axis Tilt: 3
Axis Rotation: 70
Preferred Company: LaneMaster

Re: Program for drilling ovals

Post by ijohn83 »

I am asking for a way to convert from my grip center line finger pitches to my CLT line finger pitches then back to my grip center line finger pitches after changes.

There is a 24 deg. Difference between to two.

~John
Right Handed
MF - 4 1/8, 1/4 L, 1/8 Rev.
RF - 4 5/16, 5/8 R, 3/8 Rev.
Thumb - 3 1/8" Long, 7/16 Rev, 1/8 R, 47 Deg. oval (27/32 x 1)
PAP: 5 3/4 x 3/4 up
Speed: 18.0 off hand
Rev Rate: 200
Axis Rot: 70
Axis Tilt: 3
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2y2
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Positive Axis Point: 5 1/8 and 3/8 over
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Rev Rate: 350
Axis Tilt: 10º
Axis Rotation: 45º
Heavy Oil Ball: Storm CodeX
Medium Oil Ball: Brunswick Python
Light Oil Ball: Pitch Blue
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Location: Merida City, Yucatan, Mexico
Contact:

Re: Program for drilling ovals

Post by 2y2 »

Hi John,

Assuming you're right handed you can get the result you're looking for making some changes in the way you input data, because this case is the reverse case compared to drilling ovals.

I'm making the next considerations:

You're pitching the holes relative to the CLT line which is 24º counterclockwise from the vertical center line of your grip, with these values:

Middle finger = 1/8 forward & 1/4 left
Ringer finger = 3/8 reverse & 5/8 right

You want to know what are those pitches relative to the real vertical center line of your grip.

Then you have to use the program this way:

- You set the program as Left handed bowler
- Input your pitches as normal (the ones I wrote before)
- Instead of the 24º you input 66º (90º-24º)
- That's it, there you have it.

Results must be:

Middle finger = .0125" (9/32) forward & 0.2792" (1/64) left (Note that fractional reads are less accurate)
Ringer finger = 0.884" (3/32) reverse & 0.7235" (23/32) right

I have confirmed the results graphically, not on any ball.
I haven't tested the program for this purpose but I think it works this way.
I don't know very well the CLT method so I don't know if my assumptions are correct.

Hope it helps.

Thank you.

Jorge
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ijohn83
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Posts: 121
Joined: October 1st, 2010, 7:48 am
THS Average: 188
Positive Axis Point: 5 3/4 over x 3/4up
Speed: Off the hand: 17.0 MPH
Rev Rate: 200
Axis Tilt: 3
Axis Rotation: 70
Preferred Company: LaneMaster

Re: Program for drilling ovals

Post by ijohn83 »

2y2 wrote: Middle finger = .0125" (9/32) forward & 0.2792" (1/64) left (Note that fractional reads are less accurate)
Very helpful and I believe I understand assuming the fractions for the middle finger were transposed.
You are very smart and helpful.

Thanks so much,

~John
Right Handed
MF - 4 1/8, 1/4 L, 1/8 Rev.
RF - 4 5/16, 5/8 R, 3/8 Rev.
Thumb - 3 1/8" Long, 7/16 Rev, 1/8 R, 47 Deg. oval (27/32 x 1)
PAP: 5 3/4 x 3/4 up
Speed: 18.0 off hand
Rev Rate: 200
Axis Rot: 70
Axis Tilt: 3
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2y2
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Positive Axis Point: 5 1/8 and 3/8 over
Speed: 17 mph
Rev Rate: 350
Axis Tilt: 10º
Axis Rotation: 45º
Heavy Oil Ball: Storm CodeX
Medium Oil Ball: Brunswick Python
Light Oil Ball: Pitch Blue
Preferred Company: None
Location: Merida City, Yucatan, Mexico
Contact:

Re: Program for drilling ovals

Post by 2y2 »

Thankyou you John and elgavachon for your kind comments. It is an honor to give my 20 cents to this great comunity.
Yes, you're right I transposed them, sorry. Here's the output in the program's screen.
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2y2
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Positive Axis Point: 5 1/8 and 3/8 over
Speed: 17 mph
Rev Rate: 350
Axis Tilt: 10º
Axis Rotation: 45º
Heavy Oil Ball: Storm CodeX
Medium Oil Ball: Brunswick Python
Light Oil Ball: Pitch Blue
Preferred Company: None
Location: Merida City, Yucatan, Mexico
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Interface updated, new look

Post by 2y2 »

Hello, just to let you guys know that I changed a bit the look of the program so I hope it's more clear in the results fields. If you get to the program and see the same old interface just refresh the page and it will load again but with the new look. Thank you.

Jorge
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elgavachon
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Re: Program for drilling ovals

Post by elgavachon »

I have used this system 3x now with great success. Perfect each time.

Great work 2y2.
THANKS A LOT

The new background theme is very nice.
Those who have not visited the site should do so.

Go to wiki under fitting: http://wiki.bowlingchat.net/wiki/index. ... on#Fitting" onclick="window.open(this.href);return false; & click on Ovalator: http://www.2y2.com.mx/ovalator/Ovalator10-abr.html" onclick="window.open(this.href);return false;
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Re: Program for drilling ovals

Post by MegaMav »

2y2,

If for some reason you decide to discontinue your website, please contact me, I'd be more than willing to grant you a sub domain so your code lives on.

Good work,

-Eric
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russelldean
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Re: Program for drilling ovals

Post by russelldean »

Great work Jorge.
I knew there would be someone here, with the ability to figure it out. Hopefully it will be put to use by those without a Mill...
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2y2
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Heavy Oil Ball: Storm CodeX
Medium Oil Ball: Brunswick Python
Light Oil Ball: Pitch Blue
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Re: Program for drilling ovals

Post by 2y2 »

Thank you guys for your kind comments, it is an honor to me to know the program is being useful. Eric, I'm not planning on discontinue the website but in the remote case I have to, I will let you know for sure, thanks. Russelldean, the real solution (the most straightforward, we got the same results with different methods) came from LabRat, I just translated it into the program, I have to give him credit for this work too.
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russelldean
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Re: Program for drilling ovals

Post by russelldean »

Fyi. Got a guy now using this program regularly now. Has got some of his old customers back who previously left him... :mrgreen:
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2y2
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Medium Oil Ball: Brunswick Python
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Re: Program for drilling ovals

Post by 2y2 »

Wow! It's great to know that. Thanks Russelldean
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Fmglock9
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Re: Program for drilling ovals

Post by Fmglock9 »

after drilling the pilot hole with desired thumb pitches do you zero out the pitches to make the oval cuts or leave them alone and continue on?
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2y2
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Re: Program for drilling ovals

Post by 2y2 »

Once drilled you just have to cut moving the bed along the Y axis. If you have any questions I'll be glad to help.
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Re: Program for drilling ovals

Post by Fmglock9 »

2y2 just to clarify after the pilot hole is drilled do you zero out the Y axis or leave the pilot hole pitches in the digitals and just add and subtract the cuts for the 45 degree oval?
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2y2
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Positive Axis Point: 5 1/8 and 3/8 over
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Axis Tilt: 10º
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Heavy Oil Ball: Storm CodeX
Medium Oil Ball: Brunswick Python
Light Oil Ball: Pitch Blue
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Location: Merida City, Yucatan, Mexico
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Re: Program for drilling ovals

Post by 2y2 »

Fmglock9 wrote:2y2 just to clarify after the pilot hole is drilled do you zero out the Y axis or leave the pilot hole pitches in the digitals and just add and subtract the cuts for the 45 degree oval?
Ok Fmglock9, the way I design the program is to avoid moving anithing but the plate so;
1. Trace the ball.
2. Trace the pilot hole center.
3. Trace a line that passes through the pilot hole center along the long axis of the oval hole (oval angle).
4. Set the pitches as the program output.
5. Place the ball on the press and rotate it about the pilot hole center until the line of step 3 is on the "Y" axis of the press.
6. Fix the ball.
7. Drill the pilot hole.
8. Move the Y axis crank in very small increments and cut.
9. Repeat step 7 until you get the desired oval hole width.

As you see, you only set the pitches once and cut, there's no need to zeroing anything else.
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russelldean
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Re: Program for drilling ovals

Post by russelldean »

Showed this program to another small center with an old press, and the driller is giddy about drilling ovals. Feels good to have come up with a concept to help people, and great job again making it work.
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2y2
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Positive Axis Point: 5 1/8 and 3/8 over
Speed: 17 mph
Rev Rate: 350
Axis Tilt: 10º
Axis Rotation: 45º
Heavy Oil Ball: Storm CodeX
Medium Oil Ball: Brunswick Python
Light Oil Ball: Pitch Blue
Preferred Company: None
Location: Merida City, Yucatan, Mexico
Contact:

Re: Program for drilling ovals

Post by 2y2 »

russelldean wrote:Showed this program to another small center with an old press, and the driller is giddy about drilling ovals. Feels good to have come up with a concept to help people, and great job again making it work.
You have no idea of how happy I am to know that the little program is helping others. That's what great comunities like BowlingChat.net do, pushing things further to find new solutions that really work. All because a great idea of yours Russelldean, thank you very much.
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Re: Program for drilling ovals

Post by crashin12x »

Trying to access the link but I can't get through. Even I click the link from this forum. Is it the same for others?
LHB
PAP 5" over LEFT x 7/8" over UP
Tilt 18*
Speed 16 MPH (Off Hand)
Rev 250 RPM
Rot 65*
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