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### Programming Efficient Peck Drilling Cycle

June 2, 2012, 8:18 am

Using Peck Cycle is often needed when drilling deep holes.
When using proper feed and speed no peck is required at depths of up to 3xDia for regular or 5xDia for High-Performance Parabolic drills.
At depths up to 10x, up to 5 pecks are required for regular  drills and up to 3 for Parabolic.
Anything over 10x Dia requires constant pecking of 0.5-1x Dia for regular drills and 1.5-2 Dia for Parabolic.

Since for programming you need a peck amount. Here are the numbers:

Code:REGULAR JOBBER DRILLS
3x: No Peck
3x-10x: 1xDia Peck
over 10x:.75xDia Peck
over 15x:.5xDia Peck

Code:HI-HELIX HP DRILLS
5x: No Peck
5x-10x: 2xDia Peck
over 10x: 1.5xDia Peck

Of course our HSMAdvisor Speed and Feed Calculator suggests not only the Speeds and Feeds but also the proper peck depth for various drill types and depths of the hole.
It in fact was the first machinist calculator to do so. This feature was much later borrowed by our competition.

And here is a pretty image showing Peck VS Hole Depth for regular twist drill:

This not only means that peck amount should be different for different styles of drills and depths of holes.
But also that peck distance should be different for different stages of drilling the same hole.
Ideally we should start the hole with large pecks, that continually reduce as the hole gets deeper and deeper.

Let's find out how we can apply this knowledge when programming our toolpaths.
This is format for normal Pecking:

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### Renishaw OTS Tool Probe on Haas: Setting diameter wear offset value.

January 16, 2012, 7:31 pm

Renishaw OTS tool probe cycle for HAAS can set both length and diameter offsets.

Too bad there is no choice: it only puts absolute measured diameter of the tool into D- diameter offset and makes wear offset=0

But if your programming is done with the center of the cutter, then you actually only need the difference between actual and programmed diameters of the tool.

I.E.: When probing 5/8Dia end mill, we get D=0.6248. You would normally have to subtract 5/8 from it and leave the -0.0002 difference.

But there is an easier way

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### HAAS: Making G54-G59 show Z0 at the top of fixture

November 29, 2011, 10:50 pm

Problem: Work offset G54 Z0 shows some "weird number" which is very hard to relate to.

Can we make top of fixture show Z0=0.000 ?

Solution:

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