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3040 Chinese machine
« on: May 14, 2017, 07:24:00 AM »
I have a 3040 Chinese machine. When I try to make a cut it is about a 1/4", I have changed to incremental and done the calibration. Machine is in " mm " . I cannot figure this thing out. Has anyone else had this issue and what fixed it

Offline Tweakie.CNC

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Re: 3040 Chinese machine
« Reply #1 on: May 14, 2017, 07:27:50 AM »
Quote
When I try to make a cut it is about a 1/4"

Can you explain in more detail exactly what the problem is.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: 3040 Chinese machine
« Reply #2 on: May 14, 2017, 09:55:20 AM »
When I try to cut a project the machine/tool just barely moved and is so small it is you cannot make it out. when I calibrate the axis they move the desired length.. I have went back and checked sizing mm everything appears correct.
I have dxf files that were created 24x24 inch, resized in inkscape, cadcam,Meshcam and none work.
Could there be somewhere else that would effect the connection between Mach3, the controller and the machine. The board in the controller is like nothing I have been able to find, I have a db25 board, could this be the problem.
It seems to me that what Mach3 and the machine are on different scales.
Hopefully this helps.
Re: 3040 Chinese machine
« Reply #3 on: May 14, 2017, 10:02:59 AM »
There pictures of my controller in Mach3 screen post, you had ask for picture of my connections to control box.
This is continuous of other problems.

Offline Tweakie.CNC

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Re: 3040 Chinese machine
« Reply #4 on: May 14, 2017, 10:45:25 AM »
If your machine is setup in mm units and your Gcode has been prepared in Inch units then adding a G20 to the initialization string (or at the beginning) of your Gcode file should solve the problem.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: 3040 Chinese machine
« Reply #5 on: May 14, 2017, 06:47:43 PM »
Nope, didn't fix it. Has to be something with the control box. Any ideas?

Offline ger21

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Re: 3040 Chinese machine
« Reply #6 on: May 14, 2017, 07:08:56 PM »
No, it's not your control box.

Go to COnfig > Native Units. Is it set to mm?
Gerry

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Re: 3040 Chinese machine
« Reply #7 on: May 17, 2017, 12:28:47 PM »
OK! I changed the native units yesterday and printed a couple of drawings ( I made a pen holder for my machine ), saved and closed everything down for the evening, came in an showed my wife that the machine would work, YEAH!
Went out this morning to do some test cuts on the same drawings that I had done last evening, and Wham-O! Back to the same thing. Checked all settings, appears nothing has changed.
Native's set to mm, drawings in mm, sized to 177.8 x/y z to 0, ij to inc.
Changed g-code to 21
Changed G90 to G91 tried it same, so changed it back same, tried G90.1 and G91.1 same
When back checked all suggestions from here ( thanks for all the help ) everything is as it should be.
I swear all I did was sleep!!!!!!!!
Any suggestions, again - my wife thinks I drew the drawings just to prove I wasn't wasting my time !



Re: 3040 Chinese machine
« Reply #8 on: May 17, 2017, 03:13:39 PM »
Ok, I changed a drawing to cm and mm and it drew to scale. Not sure why, but, it worked !!!!!
Any thoughts

Offline RICH

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Re: 3040 Chinese machine
« Reply #9 on: May 19, 2017, 08:49:39 AM »
Quote
drawing to cm and mm and it drew to scale. Not sure why, but, it worked

Always draw to scale in mm or inches or suggest  dimensions in drawing should agree with your Mach unit configuration.
The unit in a drawing should be convertible by some distinct factor to some other desired unit.
Else..... How can you scale properly ( your asking for problems)?

RICH
« Last Edit: May 19, 2017, 08:53:57 AM by RICH »