Search:

The attached page from my book should help.

When compound thread cutting it is generally stated that the in-feed angle is half the thread angle (60 Degree thread would be 30 degree compound). In practice this is normally reduced by up to 1...

The G04 code commands a dwell (delay) to the programme. An X, F or P code (some controls use different codes) programmed with G04 specifies the length of the dwell.
Dwell time is either in seconds...

Try my book 'The Journeyman's Guide to CNC Machines' it covers all the basics for both turning and machining centres. The guide also cover G & M codes together with cycles and macro progamming, it...

The PDF files attached show a couple of examples I use for training. You are better off including the data on the part programme and not using them; create a tool library then all you have to do is...

The attached pdf file gives instruction on how to do the thread relief. This is a page from my book 'The Journeyman's Guide to CNC Machines'

11.9.1 Centre Drill
Only use on turning centres to drill for tailstock centre location or for the specific chamfer angle.
11.9.2 Spot Drill
Before drilling with a twist drill, first produce a...

The publishers have increased (doubled) the cost of the guide; but I had the chance to make some minor additions. The guide is still an excellent how-to programming manual for both turning and...

The Journeyman's Guide to CNC Machines covers both Turning & Machining Centres and is based on my experience as a programmer and trainer. The guide explains the axis nomenclature then has examples...

Try "The Journeyman's guide to CNC Machines" it is available from www.lulu.com/bryanhurst. OK it is my book but it gives practical examples covering GE Fanuc and Siemens, it costs less than £20.

A 2" x 4.5 tpi needs about 25 passes to produce. If using only the G92 cycle then the depths would be 0.016, 0.012, 0.011, 0.009, 0.007, 0.006x2, 0.005x3, 0.004x7, 0.003x7 & 0.002. I would use both...

That should have said M52 x 3

If you use a combination of cycles then you will get the best of both worlds, keep the programming lines down and control the number of passes. The example of an M52 x 4 external thread (zero is the...

My point is that all the cycles tend to take too many passes when used with a reasonable first pass depth. If you increase the first pass depth to reduce the number of passes to a more acceptable...

Sure you can adjust Q or D on some controlls to get the number of passes. The formula is something like; number of passes = (depth/fist pass)squared. My point was that the value you get for the first...

How many passes does this take (about 24? instead of 9).
I have the Depth as 0.974mm and the Ist pass of 0.35mm for the G76 cycle, this gives 8 passes. The depth of 0.35mm would of course be too...

You can use a G code to call a macro for a Fanuc control, the macro can be a complicated as you like I have used them for tool / attachment changing, probing or special machining routines.

Hear is a copy of a page from my book 'The Journeymans Guide to CNC Machines' it explains the different motion modes.

Here are some of my ideas for drill & ream.

I have some old stuff from when I worked for Churchill; not sure if I have the RS232 details, I will have a look. I do have the progamming books.

A machined surface is made up of valleys and peaks, Ra is the arithmetic average deviation of the surface valleys and peaks, ISO uses CLA (Centre Line Average). Ra 6,3 (CLA250) = Rough Machine, Ra...

To finish the selection of tool will determine the depth of cut; finishing cuts less than 0.5mm (0.02inch) tend to produce poor surface finish unless the speed is increased. The attachment is a copy...

Sorry previous was wrong page, this one should be ok.

The attachment shows my formulae for any thread.

OK, this is self publicity but I published a book on cnc machines that covers both turning and machining centres and features both GE Fanuc and Siemens controls. It has some information on...

Re your reference to rapid prototyping; I run a RP Bureau. The z-corp printer and others (3d Systems) produce quality prototypes from 3D cad (stl) files. You will need this 3D Cad to produce the...

Cant help with boxford but my book "The Journeymans Guide to CNC Machines" gives examples of cnc programming for turning and machining centres. available from www.lulu.com

Why not be proactive ask them for a copy of the G and M code lists for these machines. If you want you can explain the even contols from the same manufacturer are different and the Machine OEM will...

This is my book that attempts to take some of the mystique out of CNC programming. It cover the basics then gives examples for cycles and subroutines for generic, Fanuc and Siemens controls. It has...

My book The Journeymans Guide to CNC Machines has some quick referece charts for both G and M codes; there is a generic code 1-99 then Fanuc and Siemens codes allocated against the generic, then...