post your program so we can see it.
I was cutting out a fixture manually line for line on the MDI.
I was making a angled cut of 2.6 degrees on the X and Y, and I would loop it back around and drop .050 on the Z each time.
So I kept repeating the same 4 lines of code, but would lower the Z-axis .050 each time... and typed them in advance, and let the machine finish on its own.
On the very last pass... the Z axis traveled .150 up, randomly mid-cut, then continued it's cutting.
I thought maybe I made an error, but I looked at all my lines, and they were correct.
I even just re entered what I had typed to finish the last cut since it never removed the material originally, and it worked as I had planned.
For the life of me I can not figure out why it randomly moved .150 up on the Z-axis mid cut. Especially considering that when I re-entered the logged lines they worked correctly, and nowhere in the MDI log was there a line that would have moved the Z-axis .150 up.
Anyone have any idea what happened?
I'm concerned considering that had this randomly happened with the X or Y this would have been VERY BAD, not just lost time.
post your program so we can see it.
The problem that I see is to take the Zaxes up it should be Z.050 If you use Z-.050 the the Zaxes should be moving down not up
So if it is working the other way round , you are setting your tool height to your work up incorrectly
You may of just missed putting in the (-) sign
My experience has been 99% of the time a CNC goes exactly where you tell it to, the other 1% it crashes huge.
RAD. Yes those are my initials.
Idea, design, build, use. It never ends.
I don't have a program for it, I was just using the MDI line for line.
I had checked it for errors.
I kept re-using the same 4 lines, and one of them I would lower the Z axis at increments of .050
I know for a fact what I typed was correct. When I scrolled up the MDI log and hit enter on the last few lines, in order, it did exactly what I wanted it to do.
I was at a total depth of Z -.700 at my last line, from Z-.650 I don't see anywhere in there mistake that could be made resulting in the Z going back up to Z-.550
My last 2 lines of Code were
In the middle of that angled cut it rose up to Z-.550
Then stopped. When I came back to the machine I notice that the cut was not right. I looked into the MDI log, Scrolled up 3 lines, the 1st line brought me to the Start position of the cut followed by the 2 lines I put above.
When I hit enter on them (for the 2nd time) they did exactly what I had expected.
If I had made a mistake I wouldn't be posting this in here.
I can not figure out why the Machine went from Z-.700 to z-.550 on my last cut. I double checked the Code when it was fresh in the MDI log, I know for a FACT it was correct. Hence it worked when I hit enter on it the 2nd time.
Nowhere in there was there a code resulting in my Z-axis going to Z-.550
I have never encountered this happening. I have never seen a machine do this I have seen machines have problems like a motor or encoder go bad but this it makes me think possibly if this happened how you say and not saying you are lieing then maybe your computer since the machine only does what the computer tells it to do maybe some kind of glitch? Check all of your P's and Q's just to be sure there is nothing in there you missed cnc only do what they are told unless something goes bad like an encoder and even then it will give you an error. And yes I know these dont have encoders so that puts it all on a computer error let me ask you this--was your machine still on track with where it was at when you got to it? And you said it was not a crash? I wonder if cables could do something weird like this? I asked for your program knowing you did this in mdi because I wanted you to post what you put in exactly the way you did it maybe someone on here will see something you dont know or missed I did not write that thinking you dont know what you are doing just to try and help thats all.
Oh I know, and I appreciate the help.
I sat there for an hour... simply could not figure it out.
Don't get me wrong, the Machine is Brand new, only been cutting on it for about 3 days so I instantly assumed I had made a mistake.
But All I did was hit enter on the same lines I had already typed, and got the results I expected.
Mach 3 has been really buggy for me though. Just does weird things, and sometimes won't post G-codes from Wizards and I have to close it down and open it back up. Maybe a Software issue? I simply do not know.
I know the coding was correct, that is ruled out... I just can't figure out what happened, and it's driving me crazy.
I was on the machine for a good portion of today, and everything went smooth as could be. Mach 3 was smooth, my code ran flawless.
Yesterday when this occurred I had been having a whole slew of issues within Mach 3. I am beginning to think it is software related, but I have no hard evidence to back that up.
I simply do not know.
If anything ever seems odd with Mach3, it's a good idea to reboot the PC.Yesterday when this occurred I had been having a whole slew of issues within Mach 3
Is the PC supplied by Tormach, or did you supply it?
Mach3 2010 Screenset
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Ok herd of this before something to do with how you load your software some oneone here has to remember this issue it's not new I have not had this problem what I do is load it in the computer with the virus protection and firewall OFF completely then dont miss a single step and make sure you remove the old software the right way or rename it. Like I said this has been on these forums before glitches from software loading issues. contact tormach if someone on here does not respond I have not had this but have loaded the newest software and no problems at all.
I built the PC.
I configured everything correctly with the Parallel port, and the Mach 3 Driver test was flawless.
I have only been cutting for a few days now, but I had been practicing stuff in the air for several weeks (was waiting for Steel,tooling, and all sorts of stuff to come in) in anticipation of doing some real work on it.
Prior to this incident, all the physical movements have been spot on.
I operated CNC years ago, and am quite skilled with Manual Machining but this is the first CNC machine I have personally owned and operated A-Z.
Is there any other way of testing the PC to make sure it is not the issue?
And I will take your advice, and Reboot the PC next time Mach 3 acts funny.
Come to think of it (and not sure if this matters), I usually turn on the PC, wait until I am in Mach 3 then release the E-stop and power ON the Machine.
However, Yesterday morning I hit the PC first, then Turned on the Machine in the middle of the PC booting (wasn't thinking) perhaps that caused some kind of issue between the Machine and Controller?
Since the machine seemed to run mach 3 just fine I didn't go through with the optimization and change a bunch of settings.
I only turned off windows firewall and the default screen saver. Other then that it is a completely fresh install dedicated to the Machine.
Should I perhaps do the Windows XP optimization for Mach 3?
when I saw this same sounding problem on here before it was always either the way the mach software was loaded or I believe there are some computer parts that are not compatible double check everything in your computer as far as compatibility then reload your software in the computer only the tormach software i know it has to be done a certain way or you can have problems. Virus protection will keep some stuff from loading some times also.