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PicDither - PicEngrave - PicLaser.
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| tweakie |
Dátum/Date: Vasárnap, 2013-06-23, 06:44 | Üzenet/Post # 1 |
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Anything relating to - PicDither - PicEngrave - PicLaser etc. |
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| Tp |
Dátum/Date: Szerda, 2014-10-29, 20:16 | Üzenet/Post # 721 |
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Trying to learn how to send an attachment, let me try again with this post
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| JJWMACHINECO |
Dátum/Date: Szerda, 2014-10-29, 20:37 | Üzenet/Post # 722 |
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Hi Tony,
Welcome to the forum and glad to see you here.
Are you using an axis direction pin to turn on and off (pulse) your laser? If so, you should only need a min depth of .0000 max depth of -.002 in PEP in the TTL option.
If the laser does not turn off in white areas completely, then increase the Max depth even more by .001 at a time until it does.
Jeff
Extensivly Re-worked/Re-designed/Modified Servo K2CNC KG-3925 and the Mini Laser Engraver |
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| Tp |
Dátum/Date: Szerda, 2014-10-29, 23:02 | Üzenet/Post # 723 |
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Thank you Jeff,
I'm very pleased to have made it this far
I am running a signal off my Z axis direction pin....
that's the only thing I have done so far...
I am currently using -.0255
thanks
tp |
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| Tp |
Dátum/Date: Szerda, 2014-10-29, 23:07 | Üzenet/Post # 724 |
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Here's a picture of a John Deere I did
it took forever....and it's burned up
I'm gonna do whatever I need to to get this right
I have already gotten some suggestions from Jeff to try...
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| picengraver |
Dátum/Date: Csütörtök, 2014-10-30, 02:08 | Üzenet/Post # 725 |
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Tony,
Welcome, and thanks for buying PEP.
Don't get discouraged. I made a lot of blackened firewood (and I still make it on occasion :D) before I connected with Jeff. He is the Master.
John
I paint with a blue light beam. |
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| Tp |
Dátum/Date: Csütörtök, 2014-10-30, 02:52 | Üzenet/Post # 726 |
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Thank you, John
I am very happy with the software....
Well, if anyone can coach a person through the beginning stages of
laser engraving as it done with low powered diodes it is certainly you,
Jeff and perhaps some of the others at this place right here....
I'm certainly wide open for any suggestions and comments....
I know I need help
I am in middle of getting a DAC board made waiting on the parts etc
I have a laser 2.5w laser diode and 2.8w driver...got the kit
from Jay at jtechphotonics I'm gonna try my laser and driver with
the DAC first to see how they do
thanks for the welcome
tp |
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| Honk |
Dátum/Date: Csütörtök, 2014-10-30, 03:49 | Üzenet/Post # 727 |
 komoly tag
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Doug
I thought I might mention something to look for if you try to buy some poplar. I always look it over to see if it has Green grain in with the white. It really Shows up in the finish. I do not know What it Would Look Like with the white lacquer but I sure do not like it without.
Tony
Hi! Nice having you here. These guys here on the forum are the best and are really a lot of good help.
Jerry |
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| JJWMACHINECO |
Dátum/Date: Csütörtök, 2014-10-30, 12:02 | Üzenet/Post # 728 |
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Tony,
That driver will only except TTL or PWM input, so you will need an analog to PWM converter also. I don't think varied analog
voltage will work with it. It needs a minimum of 2.8v to the modulation to turn on the laser diode.
http://www.ebay.com/itm....DX%3AIT
Or an US Digital 10bit PWM magnetic shaft encoder instead of the DAC. 
http://www.usdigital.com/products/encoders/absolute/rotary/shaft/ma3
Jeff
Extensivly Re-worked/Re-designed/Modified Servo K2CNC KG-3925 and the Mini Laser Engraver |
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| Tp |
Dátum/Date: Csütörtök, 2014-10-30, 13:10 | Üzenet/Post # 729 |
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Jeff....
Do I understand that with the 10 bit shaft encoder I could still use
my driver and diode laser??
I was thinking before if I went the mechanical route I would still have
to change out all my stuff anyway....diode and driver...
you have an excellent tutorial for putting shaft encoder on the instructable site
shucks, I could follow that...it's all laid out right there....
Even while making plans to do the DAC I am pulled toward the encoder...
Jerry,
I know that you got a lot of help on the forum right here from these same guys
and I was amazed at the pictures of the stuff you're doing now
all of that is what convinced me to try and do the laser engraving too
tpHozzáadva (2014-10-30, 13:10)
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Oh yeah!!
I did solve one problem I had
with the large G code files generated for TTL Mach 3 had began to
freeze up... sometimes freezing up right in the middle of everthing
So, I download a new screenset that uses 75% less computing power
I haven't had the problem since.....
tp |
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| JJWMACHINECO |
Dátum/Date: Csütörtök, 2014-10-30, 13:41 | Üzenet/Post # 730 |
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Tony,
Your Jtech laser driver will only except a TTL (0v or 5v) signal or PWM which is only a 0v or 5v signal, but does it at a varied frequency.
http://en.wikipedia.org/wiki/Pulse-width_modulation
Your laser will work with both those options as I explained before, but will not work with just the DAC. If you order the analog to PWM converter, you may want to get two just incase. It's a long trip from China and could take 2-3 weeks delivery.
The PWM encoder option takes some machine work, but the bracket can be made with your CNC router using a spindle. If you have a nema 23 stepper motor you plan to use, make sure you increase the center to center distance from the two shafts to keep any magnetic fields from the stepper causing interference to the encoder. Jerry just ran into this with his analog encoder.
Can you post a link to the screenset you used? We use http://www.calypsoventures.com/downloads/msmproductionrelease.html and have no file size issues even running in XP, but never got close to Mach's 10,000,000 line limit.
Jeff
Extensivly Re-worked/Re-designed/Modified Servo K2CNC KG-3925 and the Mini Laser Engraver |
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| Tp |
Dátum/Date: Csütörtök, 2014-10-30, 16:01 | Üzenet/Post # 731 |
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Jeff
The screen set I use came right off the Mach 3 site
I tried it first and it solved my problem right off the bat
http://www.machsupport.com/software/downloads-updates/screensets/
TpHozzáadva (2014-10-30, 16:01)
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I suppose I should have said it was the 3 axis router screen by Gerry |
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| JJWMACHINECO |
Dátum/Date: Csütörtök, 2014-10-30, 16:04 | Üzenet/Post # 732 |
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Thanks Tony,
I forgot to mention we always disable the preview toolpath also. That's what bogs down Mach and raster code is just a blob on the screen anyway. 
Jeff
Extensivly Re-worked/Re-designed/Modified Servo K2CNC KG-3925 and the Mini Laser Engraver |
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| Honk |
Dátum/Date: Csütörtök, 2014-10-30, 20:37 | Üzenet/Post # 733 |
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Tony
Mach 3 has a program called MachScreen it is real easy to use. I used V1.61a http://www.kd-dietz.com/klausphp/ to build my screen set. I set it up to turn off the tool path automatically when you click the Reset button, in Mach, with an option to turn it back on for smaller files. I also added a LED that blinks green and red while the file is loading. The large files can take over an hour lo load and if the computer locks it will turn the LED off so I will know and I can restart. Mach 3 will only work with a file that has less than 10,000,000 line size. Jeff is making a program that will make the line size so Mach can use it. Keep an eye out for it when you start getting files that big. I also made it read 20 lines of code, it makes it a lot easier to see the code on a restart. I've had burns that burn for three days and I don't like it on while I am in bed.
Jerry
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| Tp |
Dátum/Date: Csütörtök, 2014-10-30, 22:06 | Üzenet/Post # 734 |
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Hello All;
I'm beginning to wonder if my lens is gonna be what I need...
after re-reading some post and considering some other things that have been suggested
I am almost certain that my lens focus is a main problem...
going by the recommendation .005 that Jeff has suggested....
I tried to get my lens refocused to that specification
1. the lens is wobbly which I can fixed with either hot melt or teflon...I suppose
2. the laser spot doesn't appear to be solid like I would expect it to be....it seems a little bit
scattered....can't quite tell...if it is really scattered or whether it just appears that way looking through
the glasses and the plexiglass shielding...
What did every one decide was the best lens to use....
Jerry,
Did you find that screenset on the Artsoft site?
tony |
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| JJWMACHINECO |
Dátum/Date: Csütörtök, 2014-10-30, 22:28 | Üzenet/Post # 735 |
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Tony,
Thanks for bringing up the lens subject as I just included this info & link in my instructables also. It has a M9X0.5 thread on it. Check yours as I
don't know what module Jtech uses.
http://www.ebay.com/itm....36f8334
DTR has something similar here on ebay, but twice as much and IMO, not as good of quality.
http://www.ebay.com/itm....3779db3
Jeff
Extensivly Re-worked/Re-designed/Modified Servo K2CNC KG-3925 and the Mini Laser Engraver |
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| Tp |
Dátum/Date: Péntek, 2014-10-31, 00:42 | Üzenet/Post # 736 |
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Jeff,
Just left the Ebay site bought two of those lenses saw them on the instructable site before you posted them here....
thought about the threads also, I am hoping they fit my diode....cross that bridge when they get here.....
I am running another Disney Tinkerbell right now....changed the PR to .0080 ???, doubled the ipm to 75....changed the depth height to -.0020
trying Atkinson Dithering this time....see how that does....trying to stop all that burning.....
I ran the "line burn test" that you use to find the PR.....
did come out so good, could not hardly see any difference using a magnifying glass
i got the lenses focus as small as I can get it....
tony |
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| Honk |
Dátum/Date: Péntek, 2014-10-31, 13:53 | Üzenet/Post # 737 |
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Tony
Going to ask a dumb Question, I am having a little trouble figuring out what kind of laser you are using? I might not understand if so just correct me? If it is a diode laser why are you Dithering? If it is a CO2 laser why are you using that lines? If it is something else I am talking out of school. What is it?
The background for the screen set is a .JPG. It can be built by you. The buttons are added by the program I mentioned. I think you can get it from ArtSoft. Is that your question?
Thanks Jerry |
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| Tp |
Dátum/Date: Péntek, 2014-10-31, 17:50 | Üzenet/Post # 738 |
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Incidentally, for everyone Jay at Jtech says that the threads on his diodes are M9x0.5 which means
my new lens that shipped today will fit my diode which is great news,
thank you Jeff for being so smart as to remind me about those things
Jerry,
You couldn't ask a dumb question, I initially bought the mach 3 laser kit from Jtech was
gonna figure it out myself how to engrave ...i was having no sucess trying to use PVC and
Vcarve pro when i stumbled across
the long forum between John and Jeff and sometimes
tweakie and later you and Doug...
Jerry, I probably didn't stress the fact, I am really brand new to all this
and I may still be doing things that dont make sense to you guys that
have it primarily all figured out...
I don't have my DAC board completed so I am limited
I was looking at all the stuff that Jeff was able to do with TTL and dithering
even photographs were like astonishing...
while I was waiting on my DAC
to be completed I was trying to do TTL
Alto' I have only been able to do clipart to any measurable success
I did three more burns of the Disney Tinkerbell last night
and I'm gonna attach them later today....
to see what everybody thinks
Jerry, I am wide open for any help...
so I welcome anyone who can tell me something...
thanks
tp
Hozzáadva (2014-10-31, 17:50)
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On the following pictures....
I went back did some adjusting and focusing on the lense
did a line burn test and then I did three pictures of the same Tinkerbell clipart
1. 75ipm ....008PR (line spacing) max cut -.0020
2.45ipm.....007PR....max height - .0020
3. 40ipm ....007...max height -.0015
I know the pictures are nothing to look at but, still they are not
all burned up like the earlier ones
tony
Az üzenetet módosította/Modified by Tp - Péntek, 2014-10-31, 23:27 |
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| Tp |
Dátum/Date: Péntek, 2014-10-31, 17:59 | Üzenet/Post # 739 |
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okay here's the pictures
 
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| Honk |
Dátum/Date: Szombat, 2014-11-01, 01:46 | Üzenet/Post # 740 |
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Tony
I'm not sure if you have been introduced to this thing or not. It is a little white to black thing that John let me use and I use it all the time. I hope he will not mind if I let you borrow it. When things are right with your laser this thing will look good.
Jerry
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