Hello, I have a lort of problem with my cnc 3018 machine but after advice of experts of this forum my machine able to work. As my shown my sub name now I face this problem .I use vectric aspire 9.0 to make gcode file I put exact measurements and grbl controller also show correct parameters but machine gave wrong measure result , for example today I draw a simple rectangular box whose X is 98mm and y 10mm but when machine gave me X 30mm and y 2mm I don't know what's the problem plzz experts ,users help me. Thank you to all
Dropside:
Hello, I have a lort of problem with my cnc 3018 machine but after advice of experts of this forum my machine able to work
It would be a big help if you post a link to that advice so we can see the whole story.
for example today I draw a simple rectangular box whose X is 98mm and y 10mm but when machine gave me X 30mm and y 2mm
That sounds as if you have entered incorrect settings in GRBL for the steps-per-millimetre. There are lots of videos on YouTube about setting up those machines.
...R
You need to calibrate your machine. Here's a video about it. His first method is plenty good enough to start.
The way I calibrated....
Download and install Universal G-Code Sender.
Once installed, choose the correct settings along the top. "Firmware" is GRBL. Port is the COM port your machine is connected to. Baud rate of 115200. Then click the "Connect" button (Icon just to the left of Firmware). If that button does not turn yellow, you are not connected. Go back and recheck the settings.
Use the Jog buttons to move your X axis to the left side of your gantry.
Click on the "Machine" menu and select "Setup Wizard...". A Pop-up will open. Once it says it is connected, hit "Next".
You probably do not have a configuration file, so just click "Next".
In this page of the wizard (Motor wiring) you can change which direction your axis move. (You should have already done this step in your other thread where they were backwards).
The next step is "Step calibration". This is what you are concerned with in this thread.
Insert a pointed bit into your spindle.
Lay a ruler on your gantry parallel to your X axis and right under your bit. Set the bit on a number like 10 cm. Jog the machine using the buttons under "Move" if you need to. Or just bump the ruler. Once it is aligned, click the "Reset to zero" button.
Now use the X+ button to jog right as far as you can without bumping into the lead screw coupler.
Look at your ruler and determine how far your machine actually moved (in millimeters). Enter that number into the first box under "Measurement". When you enter that number the number under "Calibrate" will change. It will read something similar to 399 steps/mm. Whatever that number is, enter it in the box directly below it and click on the "Update" button.
Your X axis is now calibrated.
Repeat for Y and Z. They will NOT be the same.
This method is not 100% accurate. From as far left as my machine will go to as far right mine is off a tiny bit. Less than half a millimeter. Which is "accurate enough" for what I do for now.
Dropside is currently taking a short break for cross posting amongst other things.
Bob.