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Messages - carolynsdad

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1
General Discussion / Re: Increase spot definition/clairlity
« on: December 05, 2019, 09:21:33 AM »
Did I just get unlucky with the spot clarity? I would really like to have a better defined spot.
So I think my options are either a new lens, or new laser?
- If I get anew laser, I'd like something a little more powerful.
- Looking to get through 1/8" ply would be great.
- I have Zax's T2 Laser software. (any way to change the steps per mm? considering putting on 16 tooth in lue of the 20 tooth gears)
- Is there not an option to change out the lens to change the focal distance? and hence the size of the spot? (pros/cons?)

Your subject looks to be quite a distance from the lens. Try bringing the subject higher and refocus as you may not be at the optimum distance relative to the laser emitter; I have found this can make a big difference to spot density and shape.

Out of interest what are you using to blow down your air assist tube?

Mike

2
General Discussion / Re: New T2 Facebook Semi Official group
« on: October 30, 2019, 03:47:42 PM »
After some members requests on the official T2 Facebook group and with kind permission from T2 I have now created a new facebook group where everyone can post, share files, show off work and chat in general and offer support to other members.

A good place to announce it on Facebook might be the DIY Mini Laser Engravers Group:
https://www.facebook.com/groups/diylaserengravers/

Mike

3
Projects / Re: Mayan calendar on slate
« on: August 02, 2019, 04:07:48 PM »
I have to agree seal first. Image pops more, and i feel it has a great silver tone. This is a slate coater from micheals.


Sent from my LG-G710 using Tapatalk

What do you seal with? I use Danish Oil, you may know it as Tung Oil.

4
Projects / Re: laser cut gingerbread cathedral
« on: June 17, 2019, 02:53:13 AM »
"They’ve got a 150W machine and found that a speed of 15 worked well when the speed was set to 100, with a corner speed of 60."

150W is that right?  Enough to cook the gingerbread!

Mike

6
General Discussion / Re: Grayscale with K40
« on: January 27, 2018, 02:13:22 PM »
Attached are the before, after, and Photoshop screen showing the curve used.
Excellent, thanks for sharing your work.

7
General Discussion / Re: Grayscale with K40
« on: January 27, 2018, 08:53:49 AM »
I need to also add that I am applying a Photoshop curve to make up for the non-linear laser.

I wonder if you would please send up copies of your original and processed image files so we can see the nature of the curve you apply?

8
Projects / Re: Wedding Gifts
« on: January 27, 2018, 08:47:38 AM »
Nice work!  Did you treat the slate before engraving as it is very solid?

9
Laser Accessories / Re: Rotary Axis Variations - Belt/Gear vs direct
« on: December 12, 2017, 03:40:36 AM »
Adding to the options for rotary axis I came across this which has to be the simplest idea yet
https://www.facebook.com/wood.turner.5/videos/392548474460466/?fref=gf&dti=593888904123877
And he is using Benbox!  It certainly makes a good job on his pens!

Mike

10
T2 Engraving / Re: sigh, slate help please
« on: December 04, 2017, 03:15:35 PM »
welll I reworked the photo.... I dont know if it will be better than your effort.  I'll engrave it and see.  Ideally you would want a higher resolution photo.... but you work with what you got.

Edit: it turned out pretty okish.  I only engraved it 25 mm x 25 mm It would probably look better at 80 or 85 but I didnt want to wait.  here is the technique I used.  https://www.youtube.com/watch?v=UBKXeSfuVyk

I ultimately messed with the curves till i liked it (that is a real technical term meaning I cant explain why I thought that was best) then I applied the cartoon filter then I inverted the image.  Then I used the paint bucket to fill in the black background white.

Also I forgot to add that I used my 2.5mw ttl laser settings 2000mm/min and 0-180 on the power.

Did you treat the slate surface with any product prior to engraving to get this result?

Mike

11
Cutting / Re: Cutting stencils
« on: July 22, 2017, 09:18:06 AM »
It needs something to absorb the energy, try layering it with a dark sheet of paper.

Just reminded me I must experiement with 3M Spray Mount Repositionable Adhesive on some black paper. It is excellent on displays and leaves hardly a trace on the other surface but gives a tight close interface. Search for 3M50754.

Mike

12
What Can Be Cut? / Re: I guess I have an engraver but not a cutter
« on: May 29, 2017, 09:59:35 PM »
Did you focus so that a test line burn is as small as possible?
Your statement: what distance from the cutting head should I be using?
tells me you're not focusing. True or false?

The OP did say he was using 20mm distance [lens mount face to subject I presume]. He could have been at 100mm or anything in between and whilst still able to focus for best spot size will not necessarily be at the optimum distance for the smallest achieveable spot and hence greatest power density. It isn't an easy parameter to measure; I found that trial and error was the only practical method and determined that greatest power density was at 30mm but this will vary from one lens to another as well as the lens mounting. 

I also wonder how close the lens axis is to perpendicular to the face of the laser on these low end items. I suspect this will affect how uniformly the light is gathered hence determining spot shape and power density, to some degree.

Mike

13
Z Axis / Re: Eleksmaker made good on their promise
« on: May 25, 2017, 11:58:16 PM »
I presume the laser module mounts though the rectangular aperture in the acrylic but this suggests it needs mounting points on the laser module end plate not on the backplate.  It must be very large (judging by the dimensions given for the package - 45cm x 18cm x 7cm!!) and will lose a lot of engraving area on the Y-axis, hopeless for A5 users I would have thought. It will also impose a heavy rotational cantilever loading and an possibly acceleration and deceleration issues on the X-axis if it realy does weigh 1.5kg (packaged weight) as they state!

Mike

14
T2 Engraving / Re: A few pictures of acrylic engraving
« on: May 23, 2017, 10:04:41 AM »
Very nice work, well done.

What power laser and settings are you using to achive these results?

Mike

15
T2 Engraving / Re: Error on engraving
« on: April 27, 2017, 10:10:40 PM »
Have you possibly got a program or process running in the background that periodically makes unseen demands on processor time or memory at high priority such as attempting to access the internet for an update or some other servicing?

Have a look in Windows Task Manager on the Perfomance tab and then click the Resource Monitor button and see if there is any unexpected activity or memory usage.

Other ideas are:
Clearing caches
Defrag your hard drive
Check in Control Panel | Action Centre | Check for Solutions to unreported problems   see if there are any programs with memory leakage issues.

Hope you fnd something in there soon,
Mike

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