Image is rectangles, the Left one is the back left of the machine, the right is the Front right.
Image if circles correspond to the position in the machine, as you can see the back left is a terrible cut.
You can also see single pulse dot tests and how it varies across the machine.
I have leveled the tube, checked alignment like 10 times, putting tape over the mirror the pulse dot hits same spot front and back, left and right and in all 4 corners of the machine at the head.
The front left is lovely and clean and cuts right through easy, closer I goto back left cut gets worse and worse and doesn’t cut through.
I would assume alignment issue but I’ve checked and checked, now I don’t know what to do.
It appears there is an alignment issue from the image…
Why did you mess’ with the tube?
I don’t know your machine, but I have a ‘blue’ one that’s 50 watts. The tube isn’t ‘level’ it rests against the frame for square… is this what you mean?
Just trying to clarify the chain of events…
The both images open to the inside of the machine and the ‘break’ is always furthest from the ‘end’ in the Y direction. At the rear it’s closer to the front, at the front it’s closer to the rear.
I’m assuming that laser is firing as it makes the rectangles…
I would think this means a major miss alignment to effect the optics that severely.
I levelled the tube to the machine, the machine sits 0.1 degree out of true on the floor and the tube is now the same.
reason I messed with the tube was it was hitting the mirrors very low and the final mirror was impossible to get aligned, so I raised the whole tube as well…Just to be clear this problem was before I moved the tube, this was my first step in aligning everything.
I don’t get why the closer I get to the tube the worse it gets, I would have thought the further away would cause an issue.
i have a red/black laser 1200x900 100w. tube at the back firing in the back right corner.
I cannot see what could be so far out to cause this. just checked again, pulse hits same place on the head (at mirror 3) in all corners of the machine
Unfortunately, this is not always the right way to do it. It is correct IF the whole gantry is 100% in level, but it is unfortunately very rare. I can well imagine that with your big machine, the problem is proportionally bigger to the smaller ones.
But next to that, when you write that you just hit the spot on mirror no.3 all over, then in this case there is only the nozzle left.
It is very mysterious.
Yes, Measured from the gantry to the bed and from the nozzle tip to the bed/material.
I did a job the other day that used the whole bed and noticed the cut was really bad towards the back left, so I started to check the alignment. going back to square 1 with checking the tube was aligned with the machine case was my first check. I moved the front end up about 1mm, nothing much changed here.
I changed the mirrors and put in a new lens, problem is still there.
I’ve checked bed for level with the head. checked mirrors with tape and pulse over and over again, they are as close as possible, dot is almost exactly on top of the close dot.
I also just removed the nozzle and did some circles…
Question for me then is when do you first see evidence of the problem in the chain? Assume you won’t see variation at mirror 1. What do you see with dot test at mirror 2 between short and long distance? If no variation, what do you see at mirror 3 at 4 corners?
The first break in the chain should indicate source of problem or at least lead the way.
The results seem to indicate differently as you question.
The obvious issue is the back/left and front/right
Shots at both of these would be most beneficial. Same target, two shots.
I don’t mess with tape for targets. I draw them up in Lightburn and cut them out of watercolor paper.
They fit snug into the hole in front of the mirror… the tab is to remove them.
should it be a ring? or solid. only a short pulse at 20%
checked alignment again, all 4 corners are pretty much spot on. even checked with old mirror in and tape on the actual mirror, hits same spot front right and back left corners…
