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Offline kolias

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Strange Results
« on: October 07, 2009, 05:47:30 PM »
After about 6 weeks that I did not work on my CNC I started again today but the results were very disappointing.

I tried to engrave the same piece like I had done before but for some reason the depth of cut was uneven and at one point it went thru the 1/2” stock.

I set the depth of cut in LC to 1/8” and all the other settings like I had done before but afterwards I noticed on the gcode the Z was 0.125 instead of -0.125

Anyone can tell me what I did wrong?
Nicolas

Nicolas

Offline kolias

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Re: Strange Results
« Reply #1 on: October 08, 2009, 11:01:58 AM »
Can someone tell me what is wrong with the attached files please?

I set my depth of cut to -0.125 in LC but that is not what I get on Mach3

In addition I noticed on Mach3 tool display window that the little arrow which indicates the depth of cut does not move up or down as the program runs and I remember that it used to go up and down

Nicolas
Nicolas
Re: Strange Results
« Reply #2 on: October 08, 2009, 07:05:38 PM »
Hi Kolias,

Did you use the exactly same .tap -file as 6 weeks ago? Or did you generate it again with LazyCam just before cutting?

If "generated again", would you still have the old file on your harddisk?

regards
Konrad

Offline kolias

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Re: Strange Results
« Reply #3 on: October 08, 2009, 07:16:22 PM »
Hi Kolias,

Did you use the exactly same .tap -file as 6 weeks ago? Or did you generate it again with LazyCam just before cutting?

If "generated again", would you still have the old file on your harddisk?

regards
Konrad



I did not use the old file, I thought that "I knew enough" to be able to generate a new tap file with LC.

I dont have this particular design old tap file. Normally I delete the old files since they are not important; they are only good enough for learning purposes. But I do have some other ones and they show the cutting depth to be -0.125

Thanks
Nicolas
Nicolas
Re: Strange Results
« Reply #4 on: October 08, 2009, 07:38:19 PM »
Hello again,

I just opened the Files with my local installation of LazyCam and Mach3. Everything looks normal for me.
Maximum cutting depth is -0.125 and also the tool position is displayed.  :-/


 ;D Any other Person here with better ideas than I have?  *g*


Konrad


Offline kolias

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Re: Strange Results
« Reply #5 on: October 08, 2009, 08:31:38 PM »
Hello again,

I just opened the Files with my local installation of LazyCam and Mach3. Everything looks normal for me.
Maximum cutting depth is -0.125 and also the tool position is displayed.  :-/


 ;D Any other Person here with better ideas than I have?  *g*


Konrad




That is strange because on my screen the tool position is always at 0 no matter which line of the code is running (I scroll down in the code with my mouse) and this happens even with other tap files I load.

I wonder if I have change something on Mack3 by mistake

Also in the tap file line N35 Z0.2000 and N40 G1 Z-0.0250 F60.00 my cutting depth should be -0.125 and not -0.0250

I dont know what I'm doing wrong
Nicolas
Nicolas
Re: Strange Results
« Reply #6 on: October 08, 2009, 08:41:33 PM »
Hmmmm, just scrolling through the code is not running it...

Only if you press "Cycle Start" there will something be moving in the toolpath.


(You can press the "offline" Button, if you don't want to move the machine. But then the machine must be referenced afterwards.)


Konrad

Offline kolias

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Re: Strange Results
« Reply #7 on: October 08, 2009, 08:52:14 PM »
Hmmmm, just scrolling through the code is not running it...

Only if you press "Cycle Start" there will something be moving in the toolpath.


(You can press the "offline" Button, if you don't want to move the machine. But then the machine must be referenced afterwards.)


Konrad

Thank you Konrad, one more item I didn't know

I will give it a try tomorrow again but I'm sure there is something wrong because I don't see the Z-0.125 anywhere in my code and I remember that before I used to see this parameter

Nicolas
Nicolas
Re: Strange Results
« Reply #8 on: October 08, 2009, 08:54:23 PM »
Z-0.125

on Line N150, N175, N200, N225 and so on.

Offline kolias

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Re: Strange Results
« Reply #9 on: October 08, 2009, 09:30:03 PM »
Z-0.125

on Line N150, N175, N200, N225 and so on.

Yes I can see that but why she starts with Z-0.0250?

Anyway I will give it a try tomorrow and see what happens

Thanks for the help
Nicolas
Nicolas