Newbie Question - Sudden z rate change
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Newbie Question - Sudden z rate change
I am trying to engrave on a sheet of brass. I am using a .007 engraving bit with a cnc Shark (Bosch Colt router). It started working fine, but then all of a sudden plunged into the piece (reading the G code it looks like .2362 inches) I can't figure out why.
I have uploaded the first snippet of the *.tap file as the file itself exceeds the size allowed by forum software. The crv file is way too big to uplaod (I could ftp it to server I maintain and link to it if that would help).
Any help would be greatly appreciated. I am learning...just slowly!
Thanks.
Andy
I have uploaded the first snippet of the *.tap file as the file itself exceeds the size allowed by forum software. The crv file is way too big to uplaod (I could ftp it to server I maintain and link to it if that would help).
Any help would be greatly appreciated. I am learning...just slowly!
Thanks.
Andy
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- Sample_tap file.txt
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- glenn
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Re: Newbie Question - Sudden z rate change
Hi Andy, and welcome to the forum!
When you select your tool, make sure that the pass depth is set very small, so vcarve cannot generate a path that exceeds a safe limit.
Also, set the flat depth on the toolpath flyout on the right.
I hope this helps... keep us informed if you still have troubles,
Glenn
When you select your tool, make sure that the pass depth is set very small, so vcarve cannot generate a path that exceeds a safe limit.
Also, set the flat depth on the toolpath flyout on the right.
I hope this helps... keep us informed if you still have troubles,
Glenn
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Re: Newbie Question - Sudden z rate change
Thanks for the quick reply. Currently the pass depth is set for .003 inches and the flat depth is set for .005 inches.
Andy
Andy
- glenn
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Re: Newbie Question - Sudden z rate change
do you use Mach?
If so, is there a chance that your z axis needs to be reversed?
Can you use jog buttons to raise z and lower z?
If so, is there a chance that your z axis needs to be reversed?
Can you use jog buttons to raise z and lower z?
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Re: Newbie Question - Sudden z rate change
Thanks again for the help Glen. I am pretty sure the Z axis is correct as I have cut 20+ items, and I have successfully cut several 3d items from 3d Vector (although this is not the first time I have had odd tool movement - I was cutting a 3d gavel and it was almost done with all of a sudden the router cut into the gavel).
I think the cnc machine is operating per spec because the G code shows the sudden plunge
G01 X-0.0805 Y-0.2457 Z-0.0050
G01 X-0.0704 Y-0.2457 Z-0.0050
G01 X-0.0716 Y-0.2440 Z-0.0050
G01 X-0.0725 Y-0.2391 Z-0.0050
G01 X-0.0728 Y-0.2009 Z-0.0050
G01 X-0.0715 Y-0.1978 Z-0.0050
G00 X-0.0715 Y-0.1978 Z0.2362
G00 X-0.0756 Y-0.2418 Z0.2362
G01 X-0.0756 Y-0.2418 Z-0.0050
I am not sure what you mean by using Mach.
Thanks again I sure appreciate the help.
Andy
I think the cnc machine is operating per spec because the G code shows the sudden plunge
G01 X-0.0805 Y-0.2457 Z-0.0050
G01 X-0.0704 Y-0.2457 Z-0.0050
G01 X-0.0716 Y-0.2440 Z-0.0050
G01 X-0.0725 Y-0.2391 Z-0.0050
G01 X-0.0728 Y-0.2009 Z-0.0050
G01 X-0.0715 Y-0.1978 Z-0.0050
G00 X-0.0715 Y-0.1978 Z0.2362
G00 X-0.0756 Y-0.2418 Z0.2362
G01 X-0.0756 Y-0.2418 Z-0.0050
I am not sure what you mean by using Mach.
Thanks again I sure appreciate the help.
Andy
- glenn
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Re: Newbie Question - Sudden z rate change
Andy,
Sorry...you have me stumped! (doesn't take much),
Mach is a cam program, by the way. Did vcarve generate the g code? The reason I ask is on my version it always includes the line number on each line of g-code.
Hope someone else can jump in and help you, I'm curious about your strange z plunge!
Glenn
Sorry...you have me stumped! (doesn't take much),
Mach is a cam program, by the way. Did vcarve generate the g code? The reason I ask is on my version it always includes the line number on each line of g-code.
Hope someone else can jump in and help you, I'm curious about your strange z plunge!
Glenn
Re: Newbie Question - Sudden z rate change
hello andy
the part you have posted, it shows your router lifting up, and the two line of red shows moving to a point (actually an inner island) and start to work there...
this code looks normal... the G00 shows rapid movement on Z because the X and Y equally with previous point.... the second shows the movement "to" ... and the next line has same X Y position so only Z moving with feedrate downward to the -0.005 level... G01 interpolated movement with predefined feedrate...
but, shark has some habit, on the forum a few member use it.... mezalick got some extensive experience of shark routers...
type in the searc on the forum, "shark" and you will get a lot posts... you might find answer you asking for...
thanks
viktor
G01 X-0.0805 Y-0.2457 Z-0.0050
G01 X-0.0704 Y-0.2457 Z-0.0050
G01 X-0.0716 Y-0.2440 Z-0.0050
G01 X-0.0725 Y-0.2391 Z-0.0050
G01 X-0.0728 Y-0.2009 Z-0.0050
G01 X-0.0715 Y-0.1978 Z-0.0050 moving with feed to this point
G00 X-0.0715 Y-0.1978 Z0.2362 same x and y moving z with RAPID
G00 X-0.0756 Y-0.2418 Z0.2362 rapid to next x and y with same z
G01 X-0.0756 Y-0.2418 Z-0.0050 same x and y moving z with feed
no sudden drop
the part you have posted, it shows your router lifting up, and the two line of red shows moving to a point (actually an inner island) and start to work there...
this code looks normal... the G00 shows rapid movement on Z because the X and Y equally with previous point.... the second shows the movement "to" ... and the next line has same X Y position so only Z moving with feedrate downward to the -0.005 level... G01 interpolated movement with predefined feedrate...
but, shark has some habit, on the forum a few member use it.... mezalick got some extensive experience of shark routers...
type in the searc on the forum, "shark" and you will get a lot posts... you might find answer you asking for...
thanks
viktor
G01 X-0.0805 Y-0.2457 Z-0.0050
G01 X-0.0704 Y-0.2457 Z-0.0050
G01 X-0.0716 Y-0.2440 Z-0.0050
G01 X-0.0725 Y-0.2391 Z-0.0050
G01 X-0.0728 Y-0.2009 Z-0.0050
G01 X-0.0715 Y-0.1978 Z-0.0050 moving with feed to this point
G00 X-0.0715 Y-0.1978 Z0.2362 same x and y moving z with RAPID
G00 X-0.0756 Y-0.2418 Z0.2362 rapid to next x and y with same z
G01 X-0.0756 Y-0.2418 Z-0.0050 same x and y moving z with feed
no sudden drop
- metalworkz
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Re: Newbie Question - Sudden z rate change
Hello Andy,
It sounds like the controller is losing control of the machine to me. This sort of thing happens with Mach3 being used as a controller if the screen saver or other applications are allowed to interrupt the system. I am not familiar with the CNC Shark and how the controller works, so I am not sure if this can be a problem with that controller.
Also I think there have been some posts here of similar problems where the activation of the controller software was not current so it was reverting to the trial version with a limited number of lines in the gcode. You may want to check the status of the software license to make sure it is not running in a limited state.
It sounds like the controller is losing control of the machine to me. This sort of thing happens with Mach3 being used as a controller if the screen saver or other applications are allowed to interrupt the system. I am not familiar with the CNC Shark and how the controller works, so I am not sure if this can be a problem with that controller.
Also I think there have been some posts here of similar problems where the activation of the controller software was not current so it was reverting to the trial version with a limited number of lines in the gcode. You may want to check the status of the software license to make sure it is not running in a limited state.
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Re: Newbie Question - Sudden z rate change
My suggestion is to make sure you don't have any unwanted nodes .
Check your design closely.
It may be a glich in the program. I had a similar issue when I was cutting an item that was sliced.
Michael
Check your design closely.
It may be a glich in the program. I had a similar issue when I was cutting an item that was sliced.
Michael
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Re: Newbie Question - Sudden z rate change
As has been said above, the moves you have highlighted in red are NOT plunges but retracts to the safe z / clearance height. The snippet of g-code you have posted looks fine.asever wrote:Thanks again for the help Glen. I am pretty sure the Z axis is correct as I have cut 20+ items, and I have successfully cut several 3d items from 3d Vector (although this is not the first time I have had odd tool movement - I was cutting a 3d gavel and it was almost done with all of a sudden the router cut into the gavel).
I think the cnc machine is operating per spec because the G code shows the sudden plunge
G01 X-0.0805 Y-0.2457 Z-0.0050
G01 X-0.0704 Y-0.2457 Z-0.0050
G01 X-0.0716 Y-0.2440 Z-0.0050
G01 X-0.0725 Y-0.2391 Z-0.0050
G01 X-0.0728 Y-0.2009 Z-0.0050
G01 X-0.0715 Y-0.1978 Z-0.0050
G00 X-0.0715 Y-0.1978 Z0.2362
G00 X-0.0756 Y-0.2418 Z0.2362
G01 X-0.0756 Y-0.2418 Z-0.0050
I am not sure what you mean by using Mach.
Thanks again I sure appreciate the help.
Andy
Brian
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Re: Newbie Question - Sudden z rate change
Thank you for all the replies and help. The more I think about it the more I think it is hardware/driver related.
It is scary how fast a machine can drive a bit through a table.
Andy
It is scary how fast a machine can drive a bit through a table.
Andy
- mezalick
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Re: Newbie Question - Sudden z rate change
If you think it's a hardware problem, try slowing down the spped rate of the machine.
I run mine at about 70%
I run mine at about 70%
asever wrote:Thank you for all the replies and help. The more I think about it the more I think it is hardware/driver related.
It is scary how fast a machine can drive a bit through a table.
Andy
Michael Mezalick
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mm@mezalick.com
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