Help with inconsistent color in stainless steal?

Hi.

304 (AISI) is only a way of telling that the material conforms to that (looseish) standard.
The ways to metallurgically acchieve that conformity varies a lot.

While the variance within the standard does not play any significant role when corrosion resistant steels regardless of the grade are used -and chosen for to be used- in their primary applications, things get very different when qualities like precise heat treatment colours are the main consideration.
Especially if the heat treatment is performed with very finicky, low power energy sources such as a low power hobby grade diode laser.

Those parameters are very difficult to check without an access to a laser lab, and even if You can/could, thereā€™s most likely 0 chance that those can be controlled in any way.
Those are inbuilt to the laser head harware circuitry.
And those are just two of the many variables.

As can be seen from these two radically different results:

Iā€™d say the climate control is the most difficult one to pull off, even if You use a hefty chunk of steel to stabilize the temperature.
The air assist temperature most likely has to be controlled at least within a ~2 degree as well, so it probably wouldnā€™t hurt to run it through that same steel block to equalize the temperatures.

I wonā€™t go as far as to say that what Youā€™re trying to acchieve is impossible, but it will be very damn hard.
But, whereā€™s the fun if it wasnā€™t hard :wink: .

In cases like this, there is a point of diminishing returns that can sneak in pretty quickly though, so at some point itā€™s often far more productive to abandon that test and concentrate on the next one.

Good luck :grinning: .

Regards,
Sam

:finland:

3 Likes

I really appreciate the spirit will try my best!

Have now tested the limits. Speed before steppers in X axis start skipping is 20,000mm/m and acceleration stars shaking the walls at 40,000mm/sĀ² realised I might have written mm/s in earlier repliesā€¦ Rockie mistake!

How do you do this with Sculpfun S9 as I have a small engraving job to do that I need to have done soon as possible.

Any help will be greatly appreciated! :pray:

Their are a lot of good factors to consider brought up by everyone in this thread, so read it all. And start testing as soon as possible! It will take time, in my experience. But there are probably better threads for starting this process. this one I started for troubleshooting a specific problem. Good luck!:slightly_smiling_face::crossed_fingers:

just showing the result(problem) from my settings and some slow motion footage showing that it is up to speed before starting the laser.

Videos need no safety glassesā€¦ I canā€™t tell what itā€™s doing anyway from that angle ā€¦

How big is the rectangle, 25mm ā€¦?

Takes almost 400mm to get to speedā€¦ thatā€™s close to 800mm in overscan. Need to get your units straight.

The acceleration calculator is in mm/s, so I doubt your machine can run 3000mm/s.

:smile_cat:

All true! got a new phone didnā€™t want to risk burning the lense. Know itā€™s possible with welding so not risking itā€¦ Yea need to pay attention to the units but why is acceleration in seconds and speed in minutes
The angle wasnā€™t ment to show the whole work only show that itā€™s up to speed when the laser turns on.
Rectangle is 40x3 mm.

No matter what metric you use, the speed with the right metric, will be the same.

The application for distance uses mm/s for speed.

If Iā€™m moving at 60 miles/hour ā€¦ itā€™s the same speed as 1 mile/minute ā€¦

Most physics use metric values in meters and seconds as a baseā€¦

Most instances, youā€™d rather not enter a 6 figure value, if your range is only a few thousand. Itā€™s basically for user convenience.

I use mm//s for all of my machinesā€¦ including a ssl (diode). Mainly because I can look at it and know if itā€™s moving at approximately the same speed.

Good luckā€¦

:smile_cat:

I know I was just indicating my frustration/opinion to have everything is seconds like you said you prefer aswellā€¦ :pray:

I think you already discussed this afterward. Are these screenshots correct? Because here you used mm/s and 3000 mm/s is impossible for a diode laser with your mechanics. But you might just have done those screenshots later on and thatā€™s not the value you used. The overscan would be 1.5m in this case :slight_smile:

No that was not correct. But your totally correct .I downloaded lightburn on a second computer just to show my settings in a reply. Turns out it was defaulted to a different unit. Itā€™s supposed to be mm/m.

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