Understanding LPI: How it works and how to use it
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- เผยแพร่เมื่อ 18 มี.ค. 2024
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In this video, I try to help those that need it get a better understanding of LPI. Even if you understand what LPI is, this may make you think about it in ways you haven't thought of using it before. I talk about how it works and how to use it to create different results while engraving and creating designs.
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Excellent presentation. I learned a lot.
Thank you so much! Great video!
Hi Stave. As usual learned a lot. Love the Ctrl 2 rotation. gonna play with that. Thanks again
This was some AWESOME information. I started engraving on 45 but never really thought about testing the spot size. Old dog learnong new tricks again😁 WHAT Control 2 is a new one for me. Lessons learned...I lost count again
Glad it was helpful!
Great information on engrave angles and ctrl 2 rotation I have never seen on any other video before, keep up the great work Steve
Thanks, will do!
Great video Steve. I will share on my facebook group. First Indian girl was completed,ran out of time on the second on.Keep up the great work.
Thanks for sharing!!
I liked the Ctrl 2 option. I learned something new, thanks steve.
Thanks for the explanation! I just ordered my LM2 30W today…can’t wait to get it and try this out!! Got to used your link too! The flasks looks great!😊
You are going to love the MK2 30W. Thanks for using my referral code.
@@HoboWithWoodThank you! I hope it does what it’s supposed to! Now I have to practice patience (not my strongest suit) LOL!😂 It’s supposed to be here 4/4-4/14. Way not soon enough for me!!!😉🤭🤣
In one of your videos you mentioned & shared a link where you get your pencils or paint pens from Amazon to color in pictures after you used the laser to draw the outline of it. Please share the video & link to those products. I would greatly appreciate it.
Keep up the amazing job
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You can find a lot of the the things I use on my shop supplies page.
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Steve, great video and I really learned a lot. One question, do you think the direction of the grain had any impact? It looks like the X-axis test were with the grain and the Y-axis went against the grain. Just wondering if that make the lines stand out more on the X?
Depending on the material, it can make a make a big impact. Softer materials are more inclined to show the lines when scanned with the grain. Bamboo and Pine are some of the worst. But some of what you see in these photos is created from too much power burning into the second layer of the plywood. But scanning perpendicular to the grain does help.
Question: Do the same thing but change from .35 to .22 see what happens??
Even though the 0-degree scan angle is faster, it still takes longer due to the smaller spot size requires more LPI. 0-degree scan angle using a .22 line interval results in 115.45 LPI taking 2 min. 90-degree scan angle using a .35 line interval results in 72.57 LPI taking 1 1/2 minutes. And that is only on a 1" square. That is still 25% faster using the 90-degree scan angle.
Where do you buy the flasks?
amzn.to/3PsJkAF
2
I understand the advantage for a larger spot size if you are doing a filled box, but doesn't that give you a poorer resolution if you are engraving a picture? I always thought the smaller the dot size (lpi) the better the resolution - just like a computer or tv?
I did not suggest this is the way to use your laser 100% of the time. There are times this will come in extremely helpful. Trying to engrave an image may not be the right time to use an LPI equivalent to spot size. Not all diode lasers have a spot size that is wider when scanning on a 90-degree scan angle. Nearly everyone uses a 0-degree scan angle. But some might should be using a 90-degree scan angle to get their smallest spot size. But I purpose ANY design using "Fill" would benefit from this as long as it is not an image. When I'm doing an "Image", I actually do the opposite of the suggestions in this video. I use the smallest spot size scan angle. I use a much higher LPI. I also slightly raise the focus. The higher LPI and slightly raised focus will create overlapping passes with the laser. This will make sure there are no visible "rows" created by the laser. But with the higher LPI and overlapping passes, you have to test to find the best power settings. It will most likely be less than you think. But if it's a regular fill, this will work. I use a "Line after fill" to give the design the definition it needs.
Thanks.@@HoboWithWood
Hey, we can watch this more than once right?
First time through didn’t all register in my brain.
I feel like this video is going to be wash, rinse and repeat.
Watch and experiment. But be sure you know your laser spot size.
Have you done these tests at 45 degrees?
The goal here was to find the fastest way to complete an engraving. To do this, you need the largest spot size at the optimum speed and power. While the 45-degree scan angle is great for uniform kerf when cutting boxes, it is not the largest spot size when using a diode laser.