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Messages - bob2299

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1
T2 Engraving / Re: Using sketch to engrave and cut a medalian
« on: November 12, 2018, 11:51:00 AM »
Sorry for the delay in getting back.

I have managed to get my project completed, but not as I would have preferred.  I have attached two final files, scott-outline-large.svg and scott-text-large.svg.

The method I used was to create one medallion was in Inkscape using circles and camBam stick fonts.  Positioned everything until I was happy.  Checked measurements for accuracy, printed on paper and checked accuracy, OK.  Saved as a dxf file and printed with T2 on cardstock, accuracy OK.

Then I went back to inkscape and duplicated the coins 15 times to fit my basswood.  I then created Scott-outline-large by selecting and deleting all but the outine.  Result 15 outines.  Then I did the same by deleting the outer circles of the coins.  Result 15 "text" drawings.  All drawings are vectors.  Created DXF file for "text" and "outline".

Using T2 I burned a reference mark at 0:0.  Using T2 with the Scott-text-large.dxf I printed the "text" drawings.  Homed the laser and it relocated at 0:0.  Loaded scott-outline-large.dxf and verified home was at 0:0.  Burned pass 1.  Rehomed for each of 6 passes.  Rehoming of two passes did not rehome correctly but were about 1mm off in the "Y" directioon.  These were manually rehomed and the burns completed. 

I was able to complete the project, the medallions are round, well spaced and will fit in a 1" Forstner bit hole 1.5mm deep. 

I still have a problem in that my laser did not rehome  to the 0:0 point every time.  I did not use the sketch technique of multi passes becuase of my rehoming problem.

Bob

2
T2 Engraving / Re: Using sketch to engrave and cut a medalian
« on: November 01, 2018, 08:13:54 AM »
Thanks, attached are the text file and the outline file in SVG format.  The text file gets one pass, the outline 5 passes. 

Bob

3
T2 Engraving / Re: Using sketch to engrave and cut a medalian
« on: October 31, 2018, 01:50:28 PM »
I am having difficulty in my medallion project, but am getting closer to success.

The medallion is created with Inkscape.  I then take the completed medallion and create two new files, one an outline and  one the text.

I then burn the text file, 1 pass at 50% power.  I home the laser.  I then burn the outline (6 passes to cut through 1.5mm basswood).  Placement or alignment is important or I end up with a poor looking medallion, see photo  (home laser pulses do not show up in photo).  The medallion is 19mm diameter (3/4").

I have been trying to find what is causing variation in my output and have finally traced it to my laser not homing to the exact same place each time.  It is about 1mm out in the "Y" direction, "X" alignment is perfect. 

Any suggestions as to what adjustments will correct this?

Bob

Corrected a couple of words

4
T2 Engraving / Re: Width of burn line
« on: October 30, 2018, 03:03:09 PM »
Thank you both. 

I am burning 1.5mm basswood.  Have done some experimenting with Forstner bit holes and inserting the
'coins".  I find that it needs a diameter of 24.6mm to fit nicely in the hole made by a 1" (25.4mm) Forstener. 

My burn requires 5 passes at 600 speed and full power.  The part of the job that is text uses same speed, 1 pass and 150 power setting.

Bob

5
T2 Engraving / Width of burn line
« on: October 30, 2018, 07:08:51 AM »
Does anyone know the typical width (kerf) of the burn line of the laser?

6
T2 Engraving / Re: Using sketch to engrave and cut a medalian
« on: October 25, 2018, 01:18:05 PM »
Thanks, found 2 you tube videos by him and watched them.  Good info.

Bob

7
T2 Engraving / Re: Using sketch to engrave and cut a medalian
« on: October 25, 2018, 10:10:58 AM »
Thanks, I think I follow what you are saying.

Bob

8
T2 Engraving / Re: Using sketch to engrave and cut a medalian
« on: October 25, 2018, 07:41:49 AM »
Hi Zak and GGallant571, the only thing Zak did differently was to select the image and do "object to path".  I do that and my DXF is OK.

When I did my creation of the sketch I didn't do "object to path".  That must mean that my image must be mostly "bitmap".  I say mostly because the circles worked, but not the text.  I subtracted text and am left with an "outline" file of circles.  It creates a good DXF file probably because I had to "object to path", then "break apart" the elements to create my DXF file which is OK.

I opened the original "composite" file.  I subtracted circles and am left with an "text" file, saved as DXF and again incorrect results.  Back to drawing board.  Applied "object to path" command, saved as DXF, opend in T2, all OK.

I am not sure where to find this in the Inkscape manual,  (I read up on paths, text and SXF files but am none the wiser) but if I make sure that my drawing has the "object to path" command used before editing or finalizing my Inkscape file I will be OK.  Must be bitmap vs vector content that was messing with me.

Does this make sense?

Bob

9
T2 Engraving / Re: Using T2 to engrave and cut a medalian
« on: October 24, 2018, 01:24:51 PM »
I thought I was cruising along on this project, but have inconsistant results.

I have created a file of several medallians using Inkscape.  The text is "CamBam stick font".  A copy of svg file attached.

When I make the DXF file and open in T2 I get the circles only, no text, copy of DXF file attached too.

Help would be apreciated.

Bob






10
T2 Engraving / Re: Using sketch to engrave and cut a medalian
« on: October 20, 2018, 07:30:27 AM »
Thanks, will check it out later today.

OK, looks like I had screwed up my procedeures. I was attempting to change sizes, whereas a simple open and run the dxf files is what I needed to do.  A much simplified workflow as you used  does the trick!

Thanks for the help.

Bob

11
T2 Engraving / Re: Using sketch to engrave and cut a medalian
« on: October 19, 2018, 01:26:12 PM »
I am working on a medalion of 1.5mm birch ply.  It has a circular outline that will be cut.  And a circular ring of text plus a number in the center.

I made the artwork in Inkscape and used CamBam stick font for the text.

The laser job will be two steps, 1st the text will be burned, then the 2nd part is to use a cut burn of several passes to cut the disc.  Trial burns have been on card-stock.

I drew the composite medallion and the separated it into two files, one the text, the other the disc.  I made 3 sizes and a total of 12 discs per sheet 4" x 6".

I found I had a number of problems.  I had the two files register well in Inkscape, but not when burned.  I made sure to have the T2 output size the same (100 x 150mm).  The registration was off for the text, I could fix it by placing a "marker" in the text file to coincide with a disc in the "outline" file.  This would come close.

Then I found that my disc diameters were printing larger than they were originally in Inkscape (were 3/4", 1", and 1.25" in inkscape).

Any ideas on a better workflow or technique to  resolve my problems.

I have attached the composite svg file.

Bob

12
T2 Engraving / Re: Using sketch to engrave and cut a medalian
« on: October 12, 2018, 10:05:48 AM »
So, starting at the end, you are suggesting I add the two jobs together in series so the single pass text is done, then the multiple cutiing passes are done.  Assume the files are joined using a text editor.

I suppose creating my medalian would be easier using Inkscape and vector drawiwngs, although the curved text in Sketch is pretty easy to use too.

I will do some more experimenting.

Thanks for the suggestions.

13
T2 Engraving / Using sketch to engrave and cut a medalian
« on: October 11, 2018, 01:16:13 PM »
I am not having too much success.  I am trying to make a small medalian for a friend's wood turnings out of 1.5 mm plywood.  It will be a disc about 1" or 1.25" diameter with his name and date around in a circle.

I have done this with curved text in a sketch see "test.t2s".

The text is OK, but is an outline form.  Question one is how can I make it solid (or must I use stick fonts or sketcch filled)?

Second thing I would like to be able to do  this by engraving the text in one pass, then cut the circle in 3 passes.  Is it possible to do this as one operation i.e. engrave and cut the circle as one Job?

I am not having any luck in reducing the size, the medallian is cutting at 2.5" (50mm) in diameter despite the sketch setting being 25 x 25.  There does not seem to be a way to use the "output size" feature. What am I doing wrong?

This is my first time using the sketch features.

Bob

14
Cutting / Re: New To Cutting and Need Some Advice
« on: August 30, 2018, 11:54:21 AM »
Hi wweagle81,

I had a lot of trouble wrapping my head around Inkscape, vectors, and bitmaps before I finally am able to get fairly consistent results.  To make life easier I made myself a workflow for preparing a DXF for use with T2.  I used the Celtic knot you started with in this topic to produce the steps and screengrabs.

I use my drawings for making Christmas decorations out of veneer stock and 1.5mm basswood.  I can do a similar write-up for burning my decorations using T2 if you think it would help.

Hope this helps you.

Bob

15
T2 Engraving / Re: What causes streaks?
« on: August 26, 2018, 11:58:26 AM »
Thanks to you both, nice easy correction.  Now DXF files work as expected.

Bob

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