Thanks! It’s very encouraging to know your large machines are engraving fine detail.
I mentioned that I have very little point of reference, so I’m attacking this somewhat blind and evaluating what I can see and measure. I can see that the laser head has too much play and that there is a lot of slap in the Y axis belt when alternating motion. Whether addressing those things will cure the engraving shortcomings remains to be seen.
I had read that large machines are not as well suited for fine engraving and deduced that was part of my issue. Perhaps wrongly. More accurate to state might be: poorly designed and/or under-spec’ed large machines will have issues with fine engraving. To answer your question, I have considered aspects of my machine are not up to par. In fact, it was apparent from the first power on. And, I’ve been upgrading parts from day 1. I suspect that will continue. LOL
My steppers operate on a 24V power supply. But it also supplies the controller.
I’m not sure what the steppers and drivers are, I’ll note this tomorrow.
I am certain the bed is not level, focus varies a lot over the span of 1.26 Million sq mm (did I do that math right? 1400 x 900mm). But the front half and left-most 2/3 is fairly level and consistent.
I am systematically troubleshooting this machine as time allows. Today I had zero time to dedicate. So, I’ll continue to research and reach as much as I can. Always more productive when I go back at it with a plan and checklist.
Going back to my lack of reference: it would be very helpful to know what parameters I should be able to operate at. I am going strictly from trial and error.
For example, I found the X and Y axis acceleration settings set at 3,000mm/S for engraving. The simple rectangle test revealed wavy horizontal lines. I lowered by a factor of 10 (300mm/S for each) and instantly had straight lines. Noted, but is this an indication of a problem and the machine should engrave fine at 3,000?
With zero support on this Chinese machine I feel I’m left to my own devices. But, maybe not! Would you kindly share parameters (speed, power, acceleration, offset etc) that work on your large machines for fine engraving? Give me a target to shoot for. Just a reference will help me identify bottlenecks and shortcomings. Then I can spend more money upgrading this behemoth!
Oh well, I’m all in and I’m learning hard lessons. So long as at the end of this journey I can design and fab the parts I need it will all be worthwhile.