Irregular circle, homing problem, power settings, backlash

According to your .lbset file your min power% is 7 and max 98:

This means the power signal going from the controller to the HVPSU will always be within the 7 to 98% power range. In LightBurn cut settings you will still have a 0 to 100% power range which will be scaled so 0 will actually be 7% and 100% will be 98%.

The reason min power % is increased at the controller to 7% is so that you don’t have such a large gap in the power scale in LightBurn - e.g. if the controller had min power set to 0% then you may only be able to start producing a laser burn at 15% power in the LightBurn cut settings (since as the tube has to have a certain amount of power before it can start to lase).

There is not any problem with your Ruida power settings, except that I do not know what your mA current reading will be if you run something at 100% in LightBurn cut settings. If the reading goes above 16mA then you should reduce “Laser 1 maximum power (%)”, in order to get maximum life from your 40W tube.

that means this 16mA should I measure where?
and what can I do so that the ruida reset no longer crashes in the enstops and what should I do so that I get an even laser image?

There are many videos on YouTube showing how to install a Milliamp meter on your laser. This is one of the first ones that came up on my search: Myers Woodshop: How To Install A Milliamp Gauge In A Chinese CO2 Laser

Are your homing switches making contact and working correctly? The diagnose function accessible via the Ruida control panel will allow you to test they are working (go into that screen and then push the limit switches to see the if the controller picks up the signal);

See page 56 of the manual;

Your ‘Homing Speed’ may be too fast 100mm/s, and your “E-Stop acceleration (mm/s^2)” setting of 200mm/s^2 is probably too slow, see my settings:

Thanks a lot, that’s much better
but what I still don’t understand
why just 16 mA?
how is the acceleration calculated?

14-16mA is what I have in my notes, you could look up the tube manufacturers specifications at find out what the max working current is. I would recommend you go under that if you want to get more life out of your laser.

I think acceleration of 200mm/s/s means that 1 second later you will be going 400mm/s, another second and you will be going 600mm/s. Or 1 second and 200mm later you would be going 0mm/s on deceleration. If you were moving at 200mm/s and wanted to stop in 2mm you would need to decelerate 100x faster than that = 20,000.

OK
I’m roughly between 14 and 16 mA
But if I want to cut with min 8 and max 100 I can’t get through by how much do I set the min value?

I have to admit that it would be much easier for me if the machine settings were in German

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What is your Max Power% in the machine settings set at now?

96% max power
how is the min power calculated when cutting

Is your Min Power machine setting still 7%?

Change that setting to 0% and then pulse the laser at different power settings until you discover the smallest power setting that will cause a fine etch/burn on a piece of wood at 20mm/s, (you can change the speed on the control panel and hold down pulse and a jog button at the same time).

If that figure is for example 14%, and you have decided that you want to get that same burn using 8% in Cut settings - then you would set your Min Power in Machine Settings to 6% (14-8).

Note: It’s probably best to not match the discovered min burn power % with a power setting less than 5% in LightBurn since you want to be certain that 0% in LightBurn will not lase at all.

7% changed to 0%
ok I determined the min pulse strength it is 6
then I replaced the 0% with 6%

why should i do that?

I think for now, don’t worry about Min Power %, just put that machine setting back to 7%, which will be a perfectly fine setting to get started with.

Ok I just saw your update, 6% is good.

Start running some more tests with engravings and let us know how you get on.

Sperrholz.lbrn2 (374.9 KB)

I don’t know how to cut it or how to test it


Test.lbrn2 (76.6 KB)

for the Y axis, should I perhaps set the backlash test better?
the line test was pretty fast and the edges were sharp
nevertheless he made the beginning, the edges and the ends darker
no idea why

6 posts were split to a new topic: Ruida Min and Max Power% rescales actual power output?

ow can I optimize the cut settings

and the line test from you also seems very quick to me. you can see many changes in direction by shaking the housing

Can this be improved somehow?

There is evidence of some backlash in your Y-axis;

You may be able to reduce this backlash by identifying any slop or play within the drivetrain, and tightening/tensioning where possible according to your machine, however over-tensioning will cause new problems.

If hardware troubleshooting yields no improvement, LightBurn has software compensation for backlash which can be enabled with the ‘Optimise Cut Path’ setting ‘Hide Backlash’:

In my opinion, the test is running too fast because the whole machine is shaking. Can the speed be limited?

what is set here?
grafik

you can set the movement speed for it
grafik

why can’t i use the position indicator
grafik

is there actually a tutorial with which you can optimally adjust lightburn to the laser start with nothing there are a lot of dependencies and sequences for such settings also for tests that you should do i think lightburn is a great program unfortunately it can also be very frustrating when it Wrong setting Even if some settings are already correct, I have not found anything that really covers all settings that the program enables to enable optimal work with the laser
It doesn’t matter whether you want to make something snow, engrave or rotary or …

now the test result looks like this


Thank you very much

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