threading on an HL-2 Lathe

[Toddjones]

Hi all, I'm very new to CNC and have plunged into it head first. A friend of mine is a CNC machinist however is experiance is limited in lathe work as it relates to the G Codes.

We tried to perform a simple ID threading operation but I either get an Alarm or it does something weird.

Here is the code!

%
O0800
G20
(PROGRAM NAME - XXXXX DATE=DD-MM-YY - 16-09-04 TIME=HH:MM - 17:10 )
(TOOL - 1 OFFSET - 1)
(ID THREAD - MIN. .5 DIA. INSERT - NONE)
G0 T0101
G97 S200 M03
G0 G54 X1.05 Z-2.0358 M8
X1.2688
G99 G32 Z-4. E.8
G0 X1.05
Z-2.0403
X1.2852
G32 Z-4. E.8
G0 X1.05
Z-2.0444
X1.3
G32 Z-4. E.8
G0 X1.05
Z-2.0444
X1.3
G32 Z-4. E.8
G0 X1.05
Z-2.0358
M9
G28 U0. W0. M05
T0100
M30
%

My machine does not recognise G32 and I was advised to switch it to G92. It runs without an alarm using G92 however it does not perform the operation as it is suppost to. It seems to reverse the operation. My machinist said if I try running it I will crash the machine.

I am very frustrated as I need to make parts with an ID threat.

Any suggestions would be appreciated. He advised that there are no proper Post processors for HAAS lathe's and that I believe the said the closest POST processor is MFLAN.


Thanks

Todd!

[HuFlungDung]

Check the Haas website for info
http://www.haascnc.com/training/

Look in the lathe workbook (the 9484 KB pdf file) on page 119 for instructions on G76 automatic multipass threading or page 140 for single pass G92 threading.

I don't think your parameter "E" is valid. If it was meant to be the feedrate "F", you'll also have to check that your machine is running slow enough to be able to cut .8" per revolution, which is an extremely coarse thread. Most likely, you've got an erroronous value there.

[rfstar]

try slowing down your spindle speed, right now you are running about 160IPM maybe to fast for the Haas

try something under 150IPM

[Datum1]

160 is capable on the haas... --but it is a HAAS ... never like haas very much..

[Ymryl]

Well, if you are running a cracked version then your friend is correct, there isn't a HAAS specific lathe post on the installation cd so it is not easily obtained. However, if you really are a Mastercam customer, a quick call to your local reseller should get you what you need as there are several HAAS lathe posts available to them.

[MILLMANM]

Simple Lathe Work Dose Not Need A Cam System, Wright It By Hand
Like Hu Flung Dung Said It Can Be Done With A G76, Or A G92

By Looking At Your Code It Will Crash G54 Z- Is A Bad Thing

Here Goes A Simple Thread Cycle
G97 S600 (SETS CONSTANT RPM)
G99 (SETS UP IPR)
G00 X.9 Z0.1 M08 (set Up A Clearance Move)
G92 X1.0 Z-.4 F.05 (f= Pitch Or Lead Of Thread 1/20=.050 )
X1.01
X1.015
X1.020 Etc Untill You Get The Proper Depth Of Thread

Or A G 76 Works Good To
G97 S600
G99 (ipr)
X.9 Z.1 M08
G76 X=minor Z= Lenght D= Depth Of Thread U= 1st Pass Depth F= Feed
G00 Z.1
Double Check Me On U

Hope This Helps
Brad