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Mike Lynch
3 min read
Programming with the appropriate structure
In past issues of The Optional Stop, we’ve stressed the importance of maintaining a good structure in your programs. The primary reason...
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Mike Lynch
2 min read
When not to use a dwell command!
As you know, G04 is used to specify a dwell – or pause – in your CNC program’s execution. With Fanuc controls, the format for the dwell...
465 views0 comments
Mike Lynch
2 min read
Two Parameters related to measurement systems
As you probably know, current model CNC machines can be used with two measurement systems – the Imperial (inch) measurement system and...
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Mike Lynch
3 min read
When are plane selection commands required?
There are three basic plane selection commands: G17 – XY plane selection G18 – XZ plane selection G19 – YZ plane selection When you first...
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Mike Lynch
2 min read
Controlling when the machine stops reading a program
All CNC machines made today allow you to transfer program to and from a distributive numerical control (DNC) system. Indeed, you probably...
519 views0 comments
Mike Lynch
3 min read
Multiple machining operations on holes
It is not uncommon to perform several machining operations on a group of holes. You may, for example, have to spot drill, drill, and tap...
133 views0 comments
Mike Lynch
2 min read
Creating modal user defined G codes
With Fanuc controls, a special series of parameters is used to create user defined G codes. As with all parameters, specific parameter...
396 views1 comment
Mike Lynch
4 min read
Creating a hole-machining canned cycle
Every so often I get a question related to how standard canned cycles work – or rather – how they don’t work in a manner desired by the...
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Mike Lynch
5 min read
Understanding the “common” fixture offset
As you know, Fanuc-controlled machining centers come with at least six fixture offsets, invoked in a program by G54 through G59...
2,376 views0 comments
Mike Lynch
2 min read
The Ten Commandments of CNC
Suggested by Rick Lucchetti of TC Industries in Crystal Lake, Illinois People strive to obey the Ten Commandments – indeed, almost...
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Mike Lynch
2 min read
Do you know the meanings and uses of all of your M codes?
As you know, M codes are miscellaneous functions – which can also be thought of as machine functions. They tend to command programmable...
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Mike Lynch
2 min read
The importance of safety commands
Safety commands – by our definition here – are a series of commands placed at the beginning of all programs that confirm that the machine...
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Mike Lynch
2 min read
Finding program-related parameters
In this issue’s G Code Primer, we discuss how to program certain program-related parameter changes with G10. Doing so, of course,...
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Mike Lynch
2 min read
Testing if the correct fixture offset is instated
In order for the cutting tool to move to the correct coordinates, the program zero point (program origin) must be properly instated....
309 views0 comments
Mike Lynch
2 min read
Programming parameter changes
There are many parameters that affect the way a CNC machine executes a program. In many cases, one appropriate setting for the parameter...
238 views0 comments
Mike Lynch
1 min read
Make all sizing adjustments with offsets
One of my cardinal rules is that all sizing adjustments should be done with offsets. However, I do – from time to time – see operators...
97 views0 comments
Mike Lynch
3 min read
Running multiple parts from a bar with a sub-spindle machine
Suggested by Troy Hubert of Cox Manufacturing In past issues of this newsletter, we have addressed this topic for chucker-type CNC...
402 views0 comments
Mike Lynch
2 min read
How does G66 work?
G66 is one of the more misunderstood custom macro B commands. Fanuc calls it a modal custom macro call. It looks just like a G65 command....
5,310 views0 comments
Mike Lynch
2 min read
Two applications for L0
With most Fanuc controls, the L word is used to specify the number of repetitions for a subprogram call. The command M98 P1000 L4 for...
137 views0 comments
Mike Lynch
2 min read
Watch out for block delete applications
As you know, block delete can be used to give the operator a choice between two conditions. The operator is told to turn the block delete...
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