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Messages - sawduststeve

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1
General Mach Discussion / Re: Z home overides at code start
« on: October 15, 2017, 09:42:59 AM »
The real problem was the CAM software was putting in a "safe Z" higher than my axis was able to move.  So it went through the limit switch until a mechanical crash trying to get to the "safe Z."  I corrected the CAM software and all is good.

2
General Mach Discussion / Re: Z home overides at code start
« on: October 10, 2017, 11:12:02 PM »
I found something.  If I set Z0 as the last item, then zero all and run the code it all works.  For some time I had had it run from multiple points and Z would home, but not mechanically hit, and it run properly.  Maybe lucky those times.

It still seems odd that only the Z would try to home and go past the home limit switch.
Steve.

3
General Mach Discussion / Z home overides at code start
« on: October 10, 2017, 03:25:03 PM »
I've been using this machine with Mach 3 and Gecko G540 for almost a decade.  This problem may have occurred before, but isn't every time.   Today the code was created by Vectric V-Carve Pro 9.0.  After setting the X0, Y0 and Z0, I went to run the code.  Z always goes to home position first, but it went past the limit switch and stalled mechanically.  Letting the code run had Z go too low, past tabs and into the table.  It seems the stalling affected the Z0 setting position.

I went to the toolbox screen and the limit switch is working.  If I use "home all", it works just fine and does not mechanically bottom out.

X and Y do not "home" at start of code, just Z.  Is this something in Mach or with Vectric?

When things work, I don't tempt fate.  What is the intent of line 140: N140 G00 G43Z1.7424H1

The G-Code is as follows;

( File created: Tuesday October 10 2017 - 02:03 PM)
( for Mach2/3 from Vectric )
( Material Size)
( X= 9.875, Y= 4.250, Z= 0.755)
()
(Toolpaths used in this file:)
(Profile 1)
(Tools used in this file: )
(1 = End Mill {0.25 inch})
N100G00G20G17G90G40G49G80
N110G70G91.1
N120T1M06
N130 (End Mill {0.25 inch})
N140G00G43Z1.7424H1
N150S18000M03
N160(Toolpath:- Profile 1)
N170()
N180G94
N190X0.0000Y0.0000F35.0
N200G00X1.5456Y3.1342Z0.9550
N210G1Z0.5033F30.0
N220G1Y2.6407F35.0
N230G1Y2.0157

Steve.

4
General Mach Discussion / Re: Bobcad V21 Post Processor
« on: November 09, 2016, 12:12:26 PM »
email sent with V23 post.

5
General Mach Discussion / Re: Limit switches lost - SOLVED!!
« on: November 20, 2015, 06:56:10 PM »
I know not to assume anything, but it happened.  In tracing the home limit/home switch wiring I used a ground that was easy to get to.  There is a DB9 in the switch wiring and the ground wire backed out just enough to create an open circuit.  It is always so apparent what the problem was after you figure it out.

Steve.

6
General Mach Discussion / Re: Limit switches lost
« on: November 18, 2015, 09:33:23 AM »
Choose an earlier version (well before the problems started)   Try that and report back
That had no affect, I went back to the 2011 xml that was attached to earlier post.  Did you get any chance to review them for improper settings?

I am convincing myself that there is something wrong with the computer LPT.  I could work around not having the home switches, but do not have confidence other communication through the LPT may become corrupted.  Today, I am going to replace the computer with one I had for backup.

I have sent two emails to Gecko for anything they might know, but have not gotten a response.

Steve.
   

7
General Mach Discussion / Re: Limit switches lost
« on: November 17, 2015, 04:43:08 PM »
I changed the Gecko G540 with a new G540 and the home switches are still not seen in the diagnostics or "automated setup of ports and pins".

I also checked all of the wiring and the switches are good going into the G540. 

Steve.



8
General Mach Discussion / Re: Limit switches lost
« on: November 17, 2015, 09:34:49 AM »
Attached are two xml, the one with suffix (2) is when I was playing with increasing the stepper velocity a day ago, before that it was the same since November 2011.

Steve.

9
General Mach Discussion / Limit switches lost
« on: November 16, 2015, 04:20:21 PM »
My desktop mill has been operational for several years in the same configuration with no problem referencing all the axis home or individually.  Today when trying to move an axis to home, it overruns the limit switch and keep trying to go.  I need to hit stop for the steppers to stop.  All three of the limit switches are not operational.

The computer hasn't had internet access for years.

The mill has a Gecko G540.  I checked the limit switches at the Gecko input strip and they all complete the circuit when closed (with all power to the Gecko off).

I went to the Mach diagnostics screen and got no inputs lighting up when closing the limit switches manually.

I tried auto setting the limit switches, but the program could not see an input change.  It did reference making sure the parallel port was configured correctly in windows (XP).  Searching here and I couldn't find any help on that.

I can load g-code and run it.  The reason I am trying to fix the limit switch issue is that running a 3D roughing program today, midway through it the mill tried to go off the table in negative X, that got me thinking the setup has lost its place maybe by never having been home.

Question #1 - Did I (operator error) turn off the limit switches?
Question #2 - How do I determine if the parallel printer port is configured correctly? 
Question #3 - Some posts talk about setting up a new profile.  Would this help?

As a last resort I could change out the G540, but want that to be the last option.  It had all worked for quite some time, not a lot of hours.

Steve.



10
Finished Screens / Re: Phantom offset in Screen 2010
« on: June 09, 2014, 10:24:13 PM »
no value in that tab.

I loaded an older file and the "limits" didn't show the extra 1/2".  I loaded a more current and it did, so something from Vectric.  Below is the first portion of code, uses the drag knife gadget in Vectric to cut veneer;

( File created: Friday, May 09, 2014 - 12:50 PM)
( for Mach2/3 from Vectric )
( Material Size)
( X= 12.000, Y= 12.000, Z= 0.020)
()
(Toolpaths used in this file:)
(Roubo Lozenges bulk V6)
(Tools used in this file: )
(1 = Dragknife End Mill)
N100G00G20G17G90G40G49G80
N110G70G91.1
N120T1M06
N130 (Dragknife End Mill)
N140G00G43Z0.2210H1
N150S0M03
N160(Toolpath:- Roubo Lozenges bulk V6)
N170()
N180G94
N190X0.0000Y0.0000F150.0
N200G00X11.9500Y1.8158Z0.2200
N210G1Z0.0110F30.0
N220G2X11.7500I-0.1000J0.0000F150.0
N230G1Z0.0100
N240G1X0.2500
N250G00Z0.2200
N260G00X11.7500
N270G1Z0.0000F30.0

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