Kudos to the Prusa crew! I want this on my printer! http://diy3dprinting.blogspot.com/2013/07/laser-cutting-with-prusa-mendel-i2.html

3D Printing
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1

Kudos to the Prusa crew! I want this on my printer!

http://diy3dprinting.blogspot.com/2013/07/laser-cutting-with-prusa-mendel-i2.html

2

Pfft, eye safety is for losers.

3

@MakiBox_Beta_Adventu take note, that’s a hack we could use on our (soon to own) MakiBoxes!

4

Those lasersiodes are $50 bucks on ebay. (Diode only!!)

5

What laser is it and what eye protection is suitable for it?

6

I guess I should stop using mirrored tiles for a print bed.

7

I have a 100mW blue laser attached to my x-carriage which i can use for engraving dark materials and exposing photoresist PCBs. Prusa’s Laser seems a fair bit more powerful and i’m already too scared of my little one to use it without proper safety glasses.

8

@Gabriel_Petrut I have something similar planned for my #Makibox , albeit probably not that powerful :slight_smile:

9

Somebody had better work on 3d printing spare eyes :wink:

10

Unbelievable how oblivious they are to the danger of that laser reflecting off the bed and screwing their eyes up slowly.

11

Nice

12

These 445nm (nanometer) laser diodes are rated for 1 watt. Though they can be driven upto 2 watt. Also a good lens without any IR filters should be used.

13

Protection for these lasers are red or yellow 445nm “PROTECTION GLASSES”.

DO NOT USE CHEAP COLOURED GLASSES!!!

14

I have been working along similar lines but am having trouble with the driver circuit for the laser. What are you using?

15

I just used a simple driver from ebay. Specificly for a blue laser. ($19.95)

It goes only up to 1 Watt though.

16

Two more questions.

How do you modulate the laser? Do you just switch the power on and off?

And what federate do you use?

17

The driver i have uses a TTL line for shutting the laser off. (Called “blanking”)

So the driver has 3 connectors.

-power in
-power out

  • ttl blanking

If you pull the ttl pin high or low (depending on the driver) the laser will shut off.

This is not the same as shutting off the main power. If you do that too often, your laser will not last long. The driver is there specifically to protect the diode.

What do you mean with “federate”?

18

Sorry Mano,
That was meant to be feed rate.

Cheers
Geoff

Sent from my iPad

19

Ah ok! I haven’t attached it to my printer. It is in my laser harp.

So i wouldn’t know how fast you can cut.