I hadnt used my openbuilds cnc plasma cutter for almost a year, where it used to work perfectly in regards to scale 1 to 1. But suddenly the cuts are about 9 to 10 % smaller than the design. Say I make a svg design that is 500mm long, turn it into g-code via openbuilds, upload it into opembuilds cam where it clearly is 500mm long. But when I make the cut it's about 450mm long It's not a cam issue as when I ask it to move 100mm it will move exactly 100mm, and the design in 3d view is the correct size as well. For some reason it decides to scale down the design when cutting.
Post sample svg, sample CAM workspace and resultant GCODE file please. Will these 3 files we can help you check. That shows machine is calibrated, CAM is the CAD>GCODE process (cad > cam > control > firmware > machine)
I have the same problem with my milling machine. Why is the engraving on a smaller scale than the design, and by half? The simulation shows the correct size. There is a problem with engraving. The same problem occurs when uploading other G-Code projects. Will you help?
Thank you for your quick response and willingness to help with my problem. I apologize in advance for the syntax and any stylistic errors in the sentences, but I don't speak English (I'm from Poland) and I use a "translator". I had to calibrate using Wizard tools earlier because with the default settings, the tool travel distances in the X, Y and Z axes were twice as small. For example, on the X axis at a distance of 100 mm on the interface, the cutter actually moved only 50 mm. As I mentioned, I calibrated using Wizards Tools on all three axes. Now Przesów agrees. If I move 100 mm in the interface, this is how much the tool moves. This is OK, but after uploading the project with the ".nc" (G-Code) extension, the engraving drawing appears to be half the size. Interestingly, in OpenBuilds Control, in the preview of the tool's operation (simulation), the drawing is in normal scale (it agrees with the rulers and the dimensions shown on these axes). Due to the fact that the engraving machine creates a smaller design than in the drawing, something else probably needs to be calibrated, but what?
I am sending you one of the G-Code projects. It is very simple, but unfortunately the milling machine makes it too small. No matter which project is loaded, the final result is half the size.
Are the holes undersized by 50% too or is it just perhaps the distance between them (stalling during the long travel move?)
I did not test the milling on the material, but on a raised cutter (in the air), so it was difficult for me to answer the question about the size of the holes. I ran to the garage to check it out . When checking, it turned out that the spindle with the tool again did not achieve the correct distances in the axes (only half the distance). I now know where the problem occurred. I will write about it because maybe someone (a beginner like me) will draw some conclusions from this case and will not wonder why "it doesn't work as it should"? Well, I did the calibration via Wizards Tool when the "LEAD 1010" machine was selected by default in the GRBL tab (settings). After calibration, everything was fine (the given 100 mm was 100 mm), but since my machine is half the size of the LEAD 1010, I wanted to change the machine profile to "Custom machine" and in the settings I changed the work table parameters to the actual ones I have. What I didn't anticipate after saving was that the saved steps changed back to default after Wizzard Tool calibration. Now I calibrated the steps again in Wizards Tool... and it was a success! Now, after loading the project in G-code, the milling machine works at a scale of 1:1. Many thanks to Peter Van Der Valt for his kindness and time. I am very happy with the purchase of the controller (BlackBox X32) and I like the Cam (OpenBuilds Control). As I get to know him better, I will probably like him more . I have another question. Is it normal that stepper motors get very hot (you can hold your hand on them, but it still almost burns you)? Is something wrong?
Up to about 80degC is normal. If its over that see docs:blackbox-x32:currentadjustment [OpenBuilds Documentation]
They probably don't exceed 80 degrees Celsius. Otherwise I wouldn't be able to keep my hand on them. Thank you for your advice. Greetings to the entire team. Krzysiek Poland
