Messages

241

General Mach Discussion / set feedrate mode G94 and g95

« on: October 01, 2012, 03:15:04 AM »

Hello Chaps,

Mach3 turning.
I do not have any measuring device on my lathe that measures the RPM
therefore i have been using G94 ( units per minute)
I would prefer to use units per revolution ( so as better to control the
surface finish)
Does Mach3 use the F word (as set in the gcode) to determine the feed per rev. or is it
dependant on feedback of the actual RPM from some odometer type device?

In other words if i code g95 f100 and feed as .025 - will the cut be the same as if
i code g95 f1000 and feed as .025 ?

many thanks

242

General Mach Discussion / block delete control

« on: September 28, 2012, 07:30:37 AM »

Hello Chaps-

I see i can use a slash as a block delete control instruction

What is the command to activate "block delete)

many thanks

fred

243

General Mach Discussion / using M30 to go to home position

« on: September 27, 2012, 10:22:48 AM »

Hello TP,
I am using mach3 for turning

I have home switches and do "set home X"" set home z" aty startup

I am reading a post that you made on the 12th march regarding the use of g28 or g30
to return to the home position

Your suggestion was that g30 x0 "would will home X first then z"

I put the block in and it moved the tool to z0 ( centreline of chuck) before going to Z0

Have i done something wrong?
I want to put a block in that causes the tool to move away from the job on the x axis and then move to the
z axis home position??

Best regards

fred

244

General Mach Discussion / Re: question on parameter syntax

« on: September 19, 2012, 03:22:13 AM »

thanks TP-
just checking

regards fred

245

General Mach Discussion / Re: tool table radius and diameter mode

« on: September 18, 2012, 03:31:08 AM »

Just for the record- I found out what the problem was

I hadnt noticed that there was an entry in the tool tip radius DRO of the tool
table of the one tool.
This then returned to a position about half of where it should have been and I mistook the position
as diameter . clearing the DRO rectified the problem
regards
fred.

246

General Mach Discussion / question on parameter syntax

« on: September 18, 2012, 03:21:54 AM »

Hello chaps,

Getting warmer here in Africa- probably getting colder where you chaps are.

a question about parameters,

to set parameters ( according to the literature i am using ) the parameter is set up using a number

for example #1=24

or

#2=[#1+2]

I am reading a copy of Digital machinist and I see the parameters are being defined
slightly differently and more "programmer-friendly" ( to coin a phrase)
a typical sequence of definitions is as follows
#<tabcentreangle>=0
#<currentX>         =#<_outsideradius>
#<currenty>          =0

First question. the ability to substitute a word for a number definitely makes
programming easier. In Mach 3 am I allowed to say #<outsidediameter>=45 .
and will the program read it correctly. The plan later on would be to say
#<outsidediameter>=[#<outsidediameter>-2]

second question
In the code from america use is made of the "<" and ">". are these symbols
understood by Mach3 or are they seen as an alternative to using "[" or "]"

Your input is sincerely appreciated

fred evans

247

General Mach Discussion / tool table radius and diameter mode

« on: September 14, 2012, 07:04:13 AM »

Hello Everyone

The machine is set for diameter mode

I am setting up a tool table with a rthand knife tool as t0101 and a parting tool as t0202
when setting the t0202 everything works exept that the tool goes to the radius instead
of the diameter.
I need it to go to diameter not to radius
All help to achieve this happy state of affairs will be gratefully accepted
Fred

248

General Mach Discussion / a few questions aboput tool table setting up

« on: September 14, 2012, 04:29:08 AM »

Hello Everyone,
Regarding tooltable setup,offsets and coordinate systems-

Please help me straighten a few things out in my mind. I know that these are all covered in
the manual but I have read through them so often that i am now completely confused

The machine is a lathe with 2 home switches working Mach3 Screenset 1024.lset

Please look at my "Simple Simon"  explanations and see if they are correct and help me with the setup.

The machine is started and told to "set home X "  "set home Z"

We have machine coordinates,program coordinates and part coordinates.

Are the following assumptions correct ?

Machine coordinates x0 z0 is the position that the toolpost will return to when G28 is called
Is this correct?

Are there times when X0Z0 machine coordinates will not be the set home position?

Program coordinate are as follows. X0 will be the chuck centreline.Z0 is usually set at the righthand
face of the workpiece.

Part coordinates will be the same as program coordinates.

Therefore program coordinates and part coordinates are the same thing? If this is correct what is
the difference between the two

Now regarding setting op the tooltable. ( for starting only 2 tools are used a rthand knife tool for
OD and facing) and a 3.5mm parting tool which cutting point is the righthand corner of the tip)
On the manual screen I set up t0101 by :-
calling T0101
doing a facing cut - this is set to axis position z=0
doing an od cut and measuring (in my case od=47.06) I set axis position x=47.06
X and Z part Zero DRO's are both on zero (0.000)
Now i open tool table and Tool 0101 is at the following positions
axis position x=47.06 Z=0-- all the other DROs are set to show 0 (Zero) including
radius,offsets wear and length.

Now I stay in tooltable and select and fit tool 0202. I jog the cutting edge to the edge of the work
(position would be t0101 x47.06 z0 )

Tool0202 cutting tip is now x47.06z0

Now which DRO must be set ? axis position,tool offsets or part zeroing ?

Please help
many thanks

249

Brains Development / What is "brains " all about

« on: September 12, 2012, 08:16:48 AM »

Hello Guys

cant contain my curiosity any longer!!!

What is this brains stuff all about?

regards

fred

250

General Mach Discussion / siemens turning software

« on: September 10, 2012, 02:44:01 PM »

Hi guys-- can someone please help me??

If I use siemens turning cam software will the resulting gcode be able to run
on a lathe application on mach3??

regards fred