Topics

41

General Mach Discussion / Another lathe tooltable thread - boring and drilling tools

« on: May 19, 2014, 02:39:22 PM »

OK guys/gals, found Hood's great video and can set the tool table up with external facing, threading tools - GREAT  

However struggling to set up boring and drilling tools.

Anyone got any solid tips?

thanks
Rim

42

General Mach Discussion / Mach3 steppers stop on G76 - but not all the time

« on: April 08, 2014, 12:03:26 PM »

Got a part I'm making that is basically a large grub/set screw with a m0.75 thread  - it is a 3 part process:

1) Shape part and put thread on (program 1)

2) Manually broach internal hex

3) Part off (program 2)

This process works fine, but randomly the steppers stop at the G76 line. However the Z index still shows the axis moving in Mach3.

Anyone got any ideas?

43

General Mach Discussion / MAP DRO button to keyboard?

« on: March 24, 2014, 11:57:55 AM »

Hi Guys, trying to map a DRO button (lathe) to a keyboard key.

Is this possible?

thanks
Rim

44

General Mach Discussion / Mach3 turn diagnostics problem

« on: March 12, 2014, 08:17:40 AM »

Hi guys I can't seem to get it to run. I enabled it in config plugins and restarted mach3. The I go to Plugin Control->turn diagnostics and... nothing.

Any ideas what I am doing wrong?

thanks
Rim

45

General Mach Discussion / Mach3 running multiple tap files?

« on: March 11, 2014, 03:36:13 PM »

I have a part and I need to start one program (tap) then do a manual broach and then finish the part with another program (tap).

At present to change the tap file I close the auto screen and then go back to it. How can i load another tap without going off the auto screen?

thanks
Rim

46

G-Code, CAD, and CAM discussions / G76 threading problem

« on: March 11, 2014, 03:33:33 PM »

Got a problem with G76

G0 G90 Z5 X9.84
G76 X8.95 Z-21 Q2 P0.75 J0.03 L45 H0.05 I29 C0.3 B0.01 T0
G80

This code works 90% of the time but then will suddenly stick on 0.75 feed, whereas when it runs properly it goes to 0.75 feed when at the point of starting the thread and then changes to 600 feed when cutting the thread.

thanks
Rim

47

G-Code, CAD, and CAM discussions / Lathe G-Code G83 L parameter?

« on: February 26, 2014, 09:50:20 AM »

The manual states:

10.7.22.4  G83  and G83.1 Cycles 
The G83 cycle (often called peck drilling) and G83.1 (rapid peck drilling) is intended for
deep drilling or milling with chip breaking. See also G73. The retracts in this cycle clear the
hole of chips and cut off any long stringers (which are common when drilling in aluminum).
This cycle takes a Q number which distance used by each peck. Program 
  G83 X~ Z~ R~ L~ Q~ 
Preliminary motion, as described above. 
Move the Z-axis only at the current feed rate downward by delta or to the Z position,
whichever is less deep. 
For G83 rapid back out to the clear Z. For G83.1 rapid out by the peck distance (Q)
Rapid back down to the current hole bottom, backed off a bit. 
Repeat steps 1, 2, and 3 until the Z position is reached at step 1. 
Retract the Z-axis at traverse rate to clear Z. 
It is an error if: 
·  the Q number is negative or zero.

L - number of repetitions in canned cycles/subroutines key used with G10

However I can't see what "L" is for? I have tried it and it seems to do nothing (tried several different numbers).

Is it relevant?

thanks
Rimmel

48

G-Code, CAD, and CAM discussions / Angle calculations for G-Code?

« on: January 25, 2014, 12:12:24 PM »

I have been searching for a while on how to calculate and angle in g-code.

e.g.

Stock - 50 diameter

I want to cut a a 45 degree angle


The mach3 wizards with cut a taper but the g-code overshoots the end. So if I put a x as 10 and z as 0 the the code will go to -9.5 (example), this is OK if it's an end angle but not if it's like the picture.

Questions:
I've seen a couple of wizards that ask for angle and then start z and end z. Isn't the z end redundant? e.g if i wanted a angle from x=0 z=0 @45 degrees to a stock diameter of 30mm then put in a z end of 500mm the angle using the z end would not be 45 degrees. I would have thought it would be either an angle or point to point and you get what angle comes out.

Anyway I would like the formulas for working this out myself - arc formulas would be nice as well.  

thanks

49

SmoothStepper USB / SYIL UK + ESS = OMG

« on: January 21, 2014, 06:15:15 AM »

ESS cost $180 (£109) in the US. I contacted warp9yd and they explained that syil are the UK outlet.

Syil are charging an eye watering £175 ($287.35) + delivery 

That's a 37.36% price hike for the UK customer  - nice 

50

General Mach Discussion / Wizards OD arc help

« on: January 20, 2014, 02:58:59 PM »

I tried the OD arc wizard and it gives me an arc in G03 code. On my denford easiturn (front tooling) it's the opposite of what i want. Can you force the OD arc to use G02 instead of G03. I have searched by cant find anything.

thanks