Messages

1

General Mach Discussion / Re: g41/g42 cutting circle at end of arc

« on: February 03, 2018, 04:20:14 PM »

Thanks Gerry,  I am beginning understand that.  I will try to redraw the part with very simple arcs, I might have to live with some poor tangence's. I might just try changing tool diameter and repost. In the original drawing when I analyzed the curves on Rhino there were lots of changes in radii and even some inflections that didn't make any graphical sense to the curve.  As they say, back to the drawing board.
Thanks again,

Greg

2

General Mach Discussion / g41/g42 cutting circle at end of arc

« on: February 02, 2018, 04:19:32 PM »

When I try to use G41/G42 to cut a profile of a heart I am getting full circles at the end of arcs at the top of the heart lobes.  It apears to be at the end of the arcs. When I comment out the offending lines the profile cuts correctly.  If I change the sign of the arc center i value on a couple of the following lines the circle goes away but the tool path has a slight jog in it.

There must be something really simple here, but maybe I am too simple to see it. Attached are the file and the xml file of the machine.

No imoticon for tearing out hair, what little I have left.

3

Bargain Basement / Emco compact 5cnc lathe

« on: March 24, 2017, 10:50:49 PM »

 Emco Compact5 cnc lathe  retro fitted with new steppers and new drivers running on Mach3. Ball screws, 0.6hp variable speed motor,3 jaw chuck, tool changer. Asking $1000. Will consider offers. Shipping wt. about 200 pounds. This is solid little machine. Spearfish, SD.

4

General Mach Discussion / Re: Default toll path axis view orientation lathe mode

« on: January 28, 2017, 02:10:56 PM »

Thanks Rich,
Out of town a couple of days helping 2 young entrepreneur friends doing way too heavy construction work for my ancient body, but the payback in the gleam in their eyes makes it worth it.

I will attach  the xml file. I will look for and reload the 0.062 version.  I don't understand where in the program the axis' moves are generated and when that information is fed to the on screen DRO and outputs.  I can switch the output lines to make the machine follow the correct axis moves and I can move the screen labels as a work around, but my nature is to understand and correct what I messed up.  If I knew where to look in the XML I would  but at this point in the game I want to get it running properly, then use this as a lesson on better understanding how the program works and where to "consider" changes to the XML code to tweak things.
With this same issue I have at times opened some XML version where the default tool path view was looking at the edge of the X plane. I am pretty sure I have a lathe XML loaded as well as a lathe screen. I will work on this a bit more before attaching a copy of that.  Is there anything simple should look at first.  Attached also is a screen shot of the attached renamed file.  It shows a 3D rendered piece of material. Where is that coming from and what is defining its dimensions.  It doesn't update to the machined path. it is like the views from the conversational turning profiles.

5

General Mach Discussion / Re: Default toll path axis view orientation lathe mode

« on: January 25, 2017, 06:14:52 PM »

Thank you.  I had that correct but since then I have found that the screen set file was corrupted . What I was seeing on the screen looked like a generic lathe turn screen but it was actually just the screen view of a lathe profile but had the parameters of a mill profile. So while it looked like a lathe tool path and the DRO axis' were labeled X and Z it was showing the X and Y view like a mill tool path when running. The tip off was that in the Config  Ports and Pins menu the right most Turn Options tab was missing. When I found and loaded a lathe profile my view is under control.  In the Mach3 Loader Session Profile screen the Mach3 Turn profile is not a lathe profile it is a mill profile in my system. I will have to do some clean up in there and rebuild my lathe profile and delete the corrupted ones.

A new issue has cropped up.  The X and the Z AXIS dro labels are reversed.  When a G01 X move is initiated the Z AXIS dro changes.  During a Z axis move the X axis dro increments. The machine actually is moving properly according to the g-code, but the AXIS' are reversed.  It seems that the screen labels are wrong. That really messed up my mind when trying  to set home and part zeroes. 
Where might that be edited and corrected?

Aruminat

6

General Mach Discussion / Default toll path axis view orientation lathe mode

« on: January 25, 2017, 02:58:11 PM »

I cannot figure out how to set the default tool path axis orientation in lathe mode so that I can see the x and z axis and when it regens that is the default view.  Right now my default regeneration view is Y and X axis with edge view(single line) of the Z axis. This is absolutely of no value.

Any assistance would be appreciated.

Aruminat

Skill level-low but improving
Age-High  and getting higher

7

G-Code, CAD, and CAM discussions / Re: G02 and G03 moving wrong direction

« on: March 04, 2015, 05:26:26 PM »

I had the reversed arcs box checked in the Turn Options tab of the Ports and Pins.  May have picked this up when looking ath some other profiles for slant bed lathes and accidentally saving the settings.  Either way got it fixed thanks to helpful members of the forum.
Aruminat

8

G-Code, CAD, and CAM discussions / Re: G02 and G03 moving wrong direction

« on: March 04, 2015, 03:44:08 PM »

RICH,
THANK YOU VERY MUCH.  I JUST DOWNLOADED AND WILL READ AND SEE WHAT I CAN LEARN.  FRUSTRATING PART IS I CODED A FILE TWO WEEKS AGO WITH WHAT I BELIEVE TO BE THE SAME SET UP ACROSS THE BOARD AND IT RAN FINE.   I AM SURE I TWEAKED SOMETHING THAT HAS CAUSED THIS.
THIS FORUM HAS BEEN WONDERFUL TO REBOOT MY BRAIN WHEN IT IS LOCKED INTO A LOOP THAT DOESN'T CUT RIGHT. OFTEN THE PROBLEM IS SO OBVIOUS THAT I DON'T SEE IT.

THANKS,
ARUMINAT

9

G-Code, CAD, and CAM discussions / G02 and G03 moving wrong direction

« on: March 04, 2015, 11:37:40 AM »

I am running Mach3 R3.043.066 in turn mode.  Using  a Mach3turn profile.  The program is generated in BobCAD V23 lathe using supplied Mach3turn post processor.

The arcs in both G02 and G03 are cutting in the opposite direction. The code is attached below.  These arcs are cutting from the  correct arc center they are just cutting the wrong direction.
Anyone had  this problem?

10

General Mach Discussion / Re: Tool Data table randomly changes between lathe and mill tools

« on: February 23, 2015, 03:59:52 PM »

Thanks Hood,
That is what I had done.  I forgot to select the set file extension when I opened the view load screen option. My Lindsay clan ancestors will probably admonish me for being so hasty.

Thanks again,

Aruminat