Messages

2451

General Mach Discussion / Re: Tapping on a mill--- HELP !?!

« on: October 20, 2006, 04:16:20 AM »

M98 P1001 is a call to a sub program the Pnnnn is the sub program you want to call

The Lnn is the number of times you want to call the sub

M99 is return to the calling program.

Graham.

2452

General Mach Discussion / Re: Tapping on a mill--- HELP !?!

« on: October 20, 2006, 04:04:41 AM »

This is what I get using the code :-

Make sure you have a CR after the M99 on the last line of code

Graham.

2453

General Mach Discussion / Re: Tapping on a mill--- HELP !?!

« on: October 20, 2006, 03:52:18 AM »

Try changing the L's to Q's, Brian says that Mach uses Q not l's

As for the Gcode, just ask me and I will tell you what you want to know, I have been writing Gcode for 2,3,4 and 5 axis for nearly 30 years

Graham.

2454

General Mach Discussion / Re: Tapping on a mill--- HELP !?!

« on: October 20, 2006, 03:43:18 AM »

Hi Chad,

no problem, I have done a mod to the tapping code based on the user feed back, last time it was used, the person did 570 holes with out a problem.

Graham.

2455

General Mach Discussion / Re: Tapping on a mill--- HELP !?!

« on: October 20, 2006, 03:17:01 AM »

Hi chad,

 just have a look at this topic, the gcode is for doing just what you want,

you will have to change the feed rates to match your tap and the L words to match your line count and that will work

Graham.

G20 G40 (standard setup lines)
S300 M3
M8
G00 G43 H3 Z1.00
G00 X0 Y0    (set position of first hole as X0 Y0)
M98 P1000 L15 (repeat 15 times)
M30

O1000
(this bit moves Y axis)
M98 P1001 L15 (repeat 15 times)
G91 (set to move incremental)
G00 Y-.5 (do move of .5 inch)
G90 X0 (set to absolute and go back to start of line)
M99

O1001
(this bit moves X axis)
M98 P1002 (tap hole)
G91 (set to incremental)
G00 X-.5 (do move of .5 inch)
G90 (back to absolute)
M99

O1002
(this bit taps hole)
G00 Z.25 (start height for tapping)
G01 Z-.25 F9.375 (feed in depth)
Z.75 F100. (you may need to play with the Z and F figures to engage reverse)
Z1. 5 F16.406 (feed out at 1.75 times in feed)  (remove this line to drill holes and change feed and depth)
M99

2456

General Mach Discussion / Re: Generating g-code for 4th axis using Unigraphics 3.0

« on: October 19, 2006, 01:51:23 PM »

Hi Carlos,

what is the size of the impeller, O/D , length, width of a vain.

Is your control standard G -code

Graham.

2457

General Mach Discussion / Re: Generating g-code for 4th axis using Unigraphics 3.0

« on: October 18, 2006, 06:00:00 PM »

Wow, why not jump in at the deep end

A Unigraphics training course is the best way, this one is not easy for a hardened user.

Can your CNC interpolate 4 axis simultaneous?

If it can't you are going to struggle.

The only way to do this is with ball nosed cutters and lots and lots of very small finishing cuts.

Lost wax casting looks like the way forward.

Graham.

2458

Tangent Corner / Re: Collet chuck source?

« on: October 18, 2006, 03:17:36 AM »

I use these and have found them to be .0005" TIR, when checked between my lathe centers.

I did it like this :-

Turn a 10mm dia 25mm long on a bit of bar and centre drill with a BS2 centre drill, part off.

Grip this in the collet chuck, center facing out!

Put a bit of scrap bar in lathe chuck, turn a 60 degree angle on end of bar. Do NOT remove from chuck!

Put fixed or running center in lathe tailstock, mount collet chuck between centers with just enough pressure to allow it to turn,

With clock on mag base you can now check runout by spinning collet chuck and clocking the shank.

Ignore the collet outer body as it don't matter.

Graham.

2459

Tangent Corner / Re: Collet chuck source?

« on: October 16, 2006, 05:05:33 PM »

Have a look here :-

http://www.jlindustrial.com/Toolholding_Workholding/Collis/Collet_Closers,_Chucks_and_Headstocks/COL-63922K/SEARCH:CATEGORY/Y/product.html

Or

http://www.jlindustrial.com/Toolholding_Workholding/Kennametal/Collet_Closers,_Chucks_and_Headstocks/EKN-14984B/SEARCH:CATEGORY/Y/product.html

2460

General Mach Discussion / Re: Automatic Oiler

« on: October 16, 2006, 12:27:43 PM »

Why not drive one off the leadscrew with a belt that way it will only lube when its moving.

Graham.