Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: SirFinland on December 01, 2013, 07:26:03 AM
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Hi,
I'm new with cnc and now i have a cnc3040. The problem I have is that everything else is working fine but the Z axis is not....
When I'm cutting lets say a piece of wood 200mm x 150mm so on the right side it is much more deeper than on the left side...
Why is it so? I have used all the settings that came with the machine...
Thanx for your help, hope you understand me.
Thomas
Finland
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And I use Vcarve 6.0
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The table top, X Y plane, should be parallel to the movement of the gantry. You shold at east check to see the condition.
If you have adjusting screws for the table top make it so. Even if you do, you still can improve by making a light cut across the complete table top.
RICH
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Hi,
Here you can see
http://youtu.be/57xY94SnlCQ
It is like when I'm moving the spindle so the deep is okay all the way, but when I'm using vcarve or gcode the spindle is going like the table aint in level...
Thomas
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Post the gcode of the cut you did on the video
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They are all same, made by vcarve pro 6.0
Doing something wrong with vcarve?
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Here is the gcode:
( test )
( File created: sunnuntai, joulukuu 01, 2013 - 06:13 )
( for Mach2/3 from Vectric )
( Material Size)
( X= 200.000, Y= 150.000, Z= 10.000)
()
(Toolpaths used in this file:)
(Profile 1)
(Tools used in this file: )
(1 = Engrave {20' 0.02" Tip Dia})
N100G00G21G17G90G40G49G80
N110G71G91.1
N120T1M06
N130 (Engrave {20' 0.02" Tip Dia})
N140G00G43Z25.400H1
N150S8000M03
N160(Toolpath:- Profile 1)
N170()
N180G94
N190X0.000Y0.000F1200.0
N200G00X5.000Y5.000Z3.175
N210G1Z-0.200F480.0
N220G1X195.000F1200.0
N230G1Y145.000
N240G1X5.000
N250G1Y5.000
N260G00Z3.175
N270G00Z25.400
N280G00X0.000Y0.000
N290M09
N300M30
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I'm not an expert with gcode but looks like line N200 of the gcode the Z is at 3.175 which to me is too high. To me this should have been 0.00
Then in line N210 the Z is -0.200 which means you do actual cutting (because it is a negative value)
I think the problem is how you set the depth of cut in Vectric
But someone else who knows the gcode will explain this better
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Ok,
How about the feed rate and plunge rate? Can it have something to do with them? I don't know whats a good setting for vcarve 6....
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I'm not an expert with gcode but looks like line N200 of the gcode the Z is at 3.175 which to me is too high. To me this should have been 0.00
This is the retract height, and is correct. It should NOT be 0.00
There's nothing wrong with the g-code.
The proper procedure is to mechanically adjust the table to be as flat as possible, then mount a sacrificial spoilboard to it, and surface that flat with the machine. Then, any work you attach to the table will be flat for your v carving.
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So I will then put an aluminum disk (something else?) on the table and run off a surface of it so I get it straight. And then leave it there so it will be always right?
Could it be that there is something wrong CNC3040 machine?
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Please check your table before you start quessing that something else is wrong.
RICH
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Don’t know what is the aluminum disk you are referring but normally the cnc table top is covered with a sacrificial material (MDF or anything similar available in your country). This sacrificial material means that you don’t care if it is damaged during the operation of the cnc and normally it is damaged and depending on the use, you replace it as needed.
Then use your cnc with an appropriate cutter to take of lets say 1/16" or 1/8" of the top. After you surface this board you leave it always there until the time needs replacement.
I can't say if there is something wrong with your machine but I will check all points to assure that there is nowhere any play and everything is tight and smooth.