Webinar: Glass Engraving
ฝัง
- เผยแพร่เมื่อ 15 ก.ย. 2020
- In this virtual workshop David Stevens and Matt Pung from Trotec Laser USA give a demonstration on glass engraving.
You'll learn more about the different glass materials, processing techniques, the Trotec rotary attachment, and last but not least, they will give you some application inspirations.
The presentation is followed by a Q&A with our Laser Experts.
Also check out our website on glass engraving: www.troteclaser.com/en/applic... - วิทยาศาสตร์และเทคโนโลยี
I used to have a lot of issues when etching crystal wine glasses on a Trotec Speedy 300, 2" lens... I tried damp paper towel, dish soap, masking paper, etc. sometimes it work but not always, I played around with the settings for few months trying to figure out the best, what I just thought is that maybe it's the vibration that is breaking the glass, not the heat. So to eliminate the vibration... I put a piece of dry cloth inside the glass and engraved it. It worked! My setting was: 80% black, Standard, Stucki, 250 res, Power 100, Speed 25. Ever since I never had breaking issues. I'm not an expert I just found a way that worked for our application, so if you have any opinion or advise please let me know. I want to show pictures and video but I don't know if I can here.
I don't use anything, just the raw glass and the piece of cloth inside the glass... it saves me so much time.
I have a 8010 Speedy 100, 30W system. It's an older machine, but it still works great. Would the settings & methods described in this video apply to engraving a wine bottle? All the glass shown was clear, but wine bottles are darker, usually dark green or brown.
Hello! Thank you for your question.
The process for engraving most colors of glass is the same as the clear glass that was shown in the seminar with some rare exceptions: For example it is not recommended to laser engrave some red colored glass because the infrared spectrum of the laser can cause the laser to not react at all or be inconsistent to the visible color red glass.
All the best, your Trotec Laser Team
when using the wet paper towel for drinking glass, do you still convert to 80% grayscale and rasterizatin / jarvis thing or no.
Hello! Thanks for your question. No, you do not need to convert to 80% grayscale when using the paper towel trick. Best, your Trotec Team
If a wet paper towel reduces the amount of heat from the laser, then how does that differ from just reducing the power setting? Realistically, if I am a glass etching business, I am trying to output hundreds of units per day. To add these steps with adhesives, etc seems like it would be prohibitive to successful fabrication.
Hi Timothy, thanks for your question!
The wet towels keep the surrounding zone cool so that the laser heat does not build up causing the glass to create more fractures than wanted.
Less laser power does not work because a certain threshold of laser power is needed to even mark the glass.
Another method to reduce the heat while keeping the power up is to convert the graphic image to around 70% greyscale (rather than black) and the laser will engrave a halftone pattern (using order dithering) spreading out the laser pulses. But this only works on larger engravings and text over 14 point in size.
Please let us know, if you have any further questions.
Take care!
Why are your machines 3 to 5 times more expensive than a similar China laser that works the same way?
@Bobster986 - Thank you for your question. There are many reasons why it pays off to invest in a premium laser system rather than in a low-cost laser. Please check out our FAQs on this topic: www.troteclaser.com/en/faqs/comparison-chinese-laser-western-laser/. If you have any further questions, please feel free to contact us here: www.troteclaser.com/en/contact/contact/?.vZqTSwY8R0OsBQ0eAEArYA.0&A%2F%2Fwww.troteclaser.com%2Fen%2F
I have a Chinese laser and three of the main differences are warranty, support and quality.
@Bobster986 Probably because it costs more to manufacture products with paid labor rather than that from political/religious prisoners. Here's a question: why would anyone buy a Chinese anything if they were aware of their rampant human rights abuses? Follow up: how do people today view those who purchased suspiciously cheap manufactured goods from late-1930s Germany?