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Messages - wild.bill

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General Discussion / Re: WOW the toys I saw today
« on: September 23, 2017, 05:59:00 PM »
I doubt that they could get the power low enough to not make the slate into dust.

They also had a huge drag knife table to cut fiberglass sheets, and a CNC that was twice the size of my shop.

They wouldn't give me a sample car either. Oh well 

General Discussion / WOW the toys I saw today
« on: September 23, 2017, 01:53:54 PM »
Earlier today I had a tour of Factory 5 who make and sell high end kit cars.

They cut all their own sheet metal and have found they get cleaner cuts with a laser than with a water jet. They have a 5Kw laser, yes 5000 watts. It was massive.

Where we use air to assist our cuts they are using liquid nitrogen. It is capable of cutting a 4' x 10' - 1/4" steel sheet into small parts in about 1/2 hour.

They paid $500,000 US for it, wish I had some change sitting around for something like that.

My wife said my toys look awful small now and kept asking if they could run the laser for us.

Projects / Re: Glass Baby!!!!!
« on: September 22, 2017, 08:19:39 PM »
Now it's etching the back of a mirror ------

Projects / Re: Glass Baby!!!!!
« on: September 22, 2017, 07:40:02 PM »
I did them on the K40, just blasted away on the clean clear glass.
Now that I have the K40 I have been etching everything I can get my
hands on, glass, tiles, acrylic, and even a ROCK.

I have at least 10 boxes of LED's so its time that I start making some bases so I
can end light some of the glass and acrylic etches.

Projects / Re: Glass Baby!!!!!
« on: September 22, 2017, 06:02:36 PM »
All this talk about glass got me playing with glass again today.
This is what I was able to come up with.

Trouble Shooting / Re: Shapeoko 2 PWM to 5.5w laser?
« on: September 19, 2017, 10:40:39 AM »
I have actually run a laser off a gshield. I used gnd and D11 to drive the TTL signal, and a separate 12V power lead to power the laser (a 4 wire setup).

I have also used the GShield to drive a non-ttl laser using an SSR where I used D11 and gnd to drive the SSR, just like driving the TTL line of a TTL laser, switching a 12V power lead (this was a 2 wire setup at the laser). A mosfet board could also be used instead of the SSR. Something like this will work well

I use an older GShield and GRBL 1.1e so I needed to get D11 off the Z endstop pin, so you need to understand how your shield is wired. The best way to test it is to get a 5V bulb and use that in place of the laser until you know that you have everything wired correctly. The intensity of the light from the bulb will change using different PWM levels.

Mini CNC / Re: Mini CNC
« on: September 17, 2017, 07:54:31 AM »
another idea for a small CNC

CAD Software / Re: Train yourself with "Estlcam"
« on: September 17, 2017, 07:08:58 AM »
I think there are a number of us that use Estlcam with CNC machines now, and as a side note I use the same build of firmware on the CNC machines and Laser machines. It does take a little while to learn to use well but I am not sure where I would want it over BCL or T2, but you could use it.

But I actually go the other way and when engraving images in acrylic using the CNC machine I like to use T2 because I get better results.

They are all designed to work with GRBL so you just need to find the feature set you need for your projects.

Engraving / Re: Making rubber stamps using 2.5w?
« on: September 17, 2017, 06:42:22 AM »
The JoAnn's near me never has anything so I don't even look anymore, but Michaels is next to a good pub so I always go there first.

Engraving / Re: Making rubber stamps using 2.5w?
« on: September 16, 2017, 05:57:44 PM »
oh man you are gonna hate me but go to michaels (the craft store).  They have a whole section of different types of foam rubbers.  While you are there, check out their precut wood for signs, clocks, and buy some $2.99 four packs of slate coasters.
yes i hate you now, just one more reason to go to michaels, like I needed another reason.

General Discussion / Re: Another K40
« on: September 15, 2017, 07:21:18 PM »
After that one my short list is to go get a bunch of different color tiles and see what I can get for results from them all.

The other thing on the short list for the K40 is to add air assist, its really needed for some materials.

General Discussion / Re: Another K40
« on: September 15, 2017, 06:30:43 PM »
Whiten Porcelain tile, never could have done that with a diode laser.

General Discussion / Re: Another K40
« on: September 15, 2017, 02:03:49 PM »
I think I am getting a good feel on how to user this machine.
Here is an image that I etched into wood with the K40

General Discussion / Re: silly Q? K40 'PWM'?
« on: September 12, 2017, 06:32:58 AM »
I have been looking at the Cohesion3D Mini Laser Upgrade and from what I have read it will support PWM on the newer systems, even analog ones. On their G+ page there were some comments from someone about how they could watch the meter moving up and down during a burn when using PWM. I happen to have the digital system so I wounder if I will see the display change with PWM.

Zax - you could make your's work with PWM by replacing the POT with a board that converts PWM to voltage like this one I use this on my small CNC to control the spindle speed via T2 rather than twisting the POT. All the POT does is works as a voltage divider where the center tap varies from 0 to V input so the rest of the circuit does not really see any difference when using a board like this.

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