Exceeding travel

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BillB
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Exceeding travel

Post by BillB »

Working in CNC12 Lathe I programed my 1st test part which is a very small part and getting an error regarding exceeding the travel in X line 16 Can someone give me a general idea of what it is, how to avoid it, and how to resolve it when you get this error?

Here is a report just in case you need it.
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report_6433DB044D1E-0623214856_2021-10-12_00-50-21.zip
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tblough
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Re: Exceeding travel

Post by tblough »

You'll need to post the Intercon file as well so we can see what line 16 was. Normally, travel exceeded errors occur because of incorrect WCS settings or tool offset issues.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
BillB
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Re: Exceeding travel

Post by BillB »

tblough wrote: Tue Oct 12, 2021 5:42 am You'll need to post the Intercon file as well so we can see what line 16 was. Normally, travel exceeded errors occur because of incorrect WCS settings or tool offset issues.
The post file is coming out of Fusion 360, here is the file.

Can you recommend a free NC viewer, have one on my computer at work but cant remember what its called. txt docs do not show line numbers that I can see
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Lathe Post 1.cnc
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cncsnw
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Re: Exceeding travel

Post by cncsnw »

From your report:

Code: Select all

CNC12 v. 4.64 coordinates file
Axis     Minus     Plus    Return     Return      Return     Return
         Limit     Limit   #1(G28)     #2(G30)      #3         #4
 Z     -8.5000    0.0000    3.50000    0.00000    0.00000    0.00000 
 X    -12.7000    0.0000    4.00000    0.00000    0.00000    0.00000 
So all of your available axis travel is in the minus direction from home (which is generally as it should be), but you have your G28 return point set to the plus side of home on both axes.

That means that any attempt to go to the G28 return point (as is usually done for tool changes, etc.) is a request to go outside the travel limits.

Given the CNC program you posted, I would have expected the "907 X axis travel exceeded" error to occur on line 5, not line 16.

Set your Z and X values under the G28 return point to zeros, or to negative numbers if desired:
F1/Setup -> F1/Part -> F9/WCS -> F1/Return
BillB
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Re: Exceeding travel

Post by BillB »

A couple of other bits of info.

I did notice today when the error popped up it said line 5 THEN it said line 16 I did not think much of it, but you saying that jogged my memory of it. Another thing is, this is a gang tool lathe if it matters at this point I have only one tool being posted at this point in that file.

My progress tonight is a follows
I went through the tool offset procedure again tonight to make sure I did it right.
Changed the G28 to X0 Z0,
loaded and reposted the file and now I'm getting exceeding travel in Z as well as per your prediction cncsnw. see screen shot
Still getting error on line 14
?
Attachments
report_6433DB044D1E-0623214856_2021-10-13_00-21-49.zip
(681.06 KiB) Downloaded 16 times
221.jpg
tblough
Posts: 1706
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CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
Location: Boston, MA
Contact:

Re: Exceeding travel

Post by tblough »

For WCS #1, there is no offset in Z, and your Z limits are set to -8.5 and 0, and tool 13 has no Z-axis offset, so your maximum movement in the positive direction is 0. Line 14 has you trying to move to Z0.0758 which exceeds your travel in the Z positive direction.

It's usually not a good idea to ignore errors when they pop up.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
BillB
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Re: Exceeding travel

Post by BillB »

I will go go threw it again. Tool 13 for now is my reference tool.
cnckeith
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Re: Exceeding travel

Post by cnckeith »

graph the part before running it, the graph is a true g code backplot and it takes into account travels etc.. and will tell you about any issues before you actually run the job.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
tblough
Posts: 1706
Joined: Tue Mar 22, 2016 10:03 am
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CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
Location: Boston, MA
Contact:

Re: Exceeding travel

Post by tblough »

Without seeing exactly how you do your tool setting it's hard to say for sure that it is right or wrong. This could be a problem with setting your WCS and not your tools. I'm leaning that way since there is no Z offset in your current WCS in the above photo with the error.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
BillB
Posts: 171
Joined: Thu Jul 15, 2021 1:43 pm
Acorn CNC Controller: Yes
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DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: none

Re: Exceeding travel

Post by BillB »

I'm doing the offsets as per the manual (skim cut method), I only have 2 tools set up an OD tool and parting tool, tool 13 is my reference tool thus no offset.

Might as well go over my settings to make sure my machine is set up correctly. Also a pic of my machine to show it in the home position.
Attachments
001.jpg
21.jpg
23.jpg
003.jpg
IMG_9210.jpg
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