It looks to me like you may have some slack or slop in your x axis you may have to give tech a call. I'm looking at your letters and they are double almost like it slipped a little. You may need to check the connection between the screw and the motors but I would call tech.
I am not sure if it has anything to do with it, but there was one frame in the supplied images, that every time , which is twice that I have carved it there were the same kind of lines. tried it as an 8 x 10 once and a 6 x 9 once, same result. I have looked at the image on zoom but don't see anything abnormal, but maybe there is some small flaw I can't see that I-Picture picks up on. everything else I carve no problem.
Unwanted lines occurred due to grayscale file processed in ArtCAM. 3D grayscale frame files saved from ArtCAM might create extra lines on workpiece. We’ve discussed this issue with ArtCAM Solution. For now, one way to avoid unwanted lines is convert files from i-Picutre.
I apologize for the misunderstanding. I realize this information was posed in the ArtCam thread, but I did not use ArtCam (Don’t even know what it is) I used the provided image that came with the machine, added text in Photoshop & processed it with iPicture.
I’ll post in forum as well. I appreciate your attention in this matter.
Close up of one side of the frame showing the lines running through it. This project has multiple lines running across. Some are single lines, some double & 2 of them are triples
Any ideas what may be causing this?
I get the same problem with some cuts. I had an issue with a line running down the middle of each cut, it was a hair off on either side as well. I found it to happen mainly when slow cutting. Multiple lines I think are from how I-Picture processes certain images. Either the software "sees" something the eye doesn't, something is running in the background slightly glitching processor time, or the file itself is processed in a format which creates bugs. Say 32 bit instead of 8, for example. Or, there could be power fluctuations during the cut itself. Just enough to throw off a line or two. Or, there is a bug in the firmware, or hardware, that reads off at times. Just too many variables with almost no way to test and verify. Each machine runs somewhere with a different setup. Everything from power to image processing differs from person to person. So you can't take an image that cuts perfectly for one person and expect it to cut the exact same way for someone else. Even circuit boards vary with production. The best you can do is find an image and keep manipulating it until it cuts to the standard you want.
I would tend to believe that in that small 7 x 9 area you are looking at some very small letters, and because of the white color and cutting 6mm deep you are not going to get a good effect . A lot of letters that I have tried that small tend to chip out on some of the letters, and all it takes is one that's messed up to ruin the project. Only thing that might help would be to get some blur into the letters, straight up and down profile is risky, but you can try it like Greg suggested on some scrap wood.
If you are using Gaussian blur, why not extrude or emboss? Those are pretty much standard in imaging software. Much crisper image with rounded edges.
Here is the reply I received via email from Oliver. "Thank you for sending me the files.
According to our engineer and the iPIcture developer, those lines usually occures when carving frame category grayscale files (those images that have a frame). On other images, the line problem doesn’t appear on images. They are currently trying to figure out why it causes this problem, and they will keep you posted.
I waited about six months for tech support to find out why I had a line dead center of every cut. Eventually I worked out it happened on slow cuts.
Although, recently I dld a file. I use a bunch of safety crap on Firefox that requires authorization for sites to use their bells and whistles. The site had a vertical overlay over the image. When I opened the pic it looked fine. When I cut it that section was off, slightly lined and a bit lower. If I would have turned off my security settings I could have gotten an error free cut. We only learn from our mistakes.
Here is the outcome. I watched the spindle go well past the edge of the board (approximately 1") on the right side. As you can see the left side is "skewed" in towards the center of the board & the right side is "skewed" away from the center of the board.
I have no idea what could have caused this or what to do about it.
I recently had that happen on a board but it went the opposite angle till it hit the limit switch and shut down, I will say I using what may have been a fairly dull endmill and I was also doing the carve on high speed. Found no problem with the machine after looking everything over. It has not happened since, redid the carve with a newer bit and normal speed the next day....no problem.
Also might want to look at the scan step, and use the default .2 the 1/50" bit is .508 mm, so a scan step of .4 is almost the diameter of the tip of the bit, that's why you see those lines in the carve. Or could be a power fluctuation, especially if some one turns something on that is on the same circuit.
I think I'm going to disagree with Bob on this one, I have ran bits that were smoking and never had one do this, this looks like a bad problem especially if it does it on other pics. The first thing I would try is to re-install I-picture you did use I-picture to make the gee code right? Next I would like to look at the actual gee code to see if the numbers are doing this are is it a machine error.