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DotG software questions, answers in English
KisKZ Dátum/Date: Szerda, 2011-12-14, 10:49 | Üzenet/Post # 1
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Anything about DotG software in English
 
tweakie Dátum/Date: Csütörtök, 2011-12-22, 14:05 | Üzenet/Post # 2
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This is my first attempt with DotG, a laser and Mach3 using one of the sample images.

Tweakie.
Csatolások/Attachments: 1891437.jpg(44Kb) · 8770924.jpg(56Kb)


Success consists of going from failure to failure without loss of enthusiasm.

Az üzenetet módosította/Modified by tweakie - Csütörtök, 2011-12-22, 14:06
 
Amatőr Dátum/Date: Csütörtök, 2011-12-22, 18:00 | Üzenet/Post # 3
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tweakie, Welcome to Our forum!
These laser engravings are awesome, congratulations!
Can You tell what laser You're using? Diode or gas? What power?


H1i.hu
 
KisKZ Dátum/Date: Csütörtök, 2011-12-22, 18:19 | Üzenet/Post # 4
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Quote (tweakie)
This is my first attempt with DotG, a laser and Mach3 using one of the sample images.


Hello Tweakie!

Welcome in our forum!

Awesome work! Congartulations!!

Question of Amateur is very good.
Please tell us something about your enviroment.
I'ts CO2. It's true?

How many time needed for finish a work like this?

Have a nice day!
 
tweakie Dátum/Date: Péntek, 2011-12-23, 08:56 | Üzenet/Post # 5
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Hi Guys,

Thank you for the warm welcome.

My machine is home built. It started out as a wood wood router and I added the CO2 laser as an additional tool. Details of the machine are here My WebPage

I have been using a Mach plugin plugin for raster work but there are instances where, I think, DotG will make a better job so I still have a lot of testing to do.
Unfortunately the mass of my X Axis is quite high and as a result the acceleration and speed limitation makes DotG quite slow in operation. This in turn means that laser power has to be set near minimum and at a current setting of less than 4mA my laser does not always fire reliably. There is always a challenge.

Tweakie.


Success consists of going from failure to failure without loss of enthusiasm.
 
tweakie Dátum/Date: Péntek, 2011-12-23, 12:33 | Üzenet/Post # 6
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I managed to get this done this morning before the seasonal celebrations start.
The image is 115mm x 156mm (chosen because it is similar to the previous DotG example) has been laser cut into an engraving laminate with a stepover of 0.2mm and it took just less than 1 hour to complete
Laser power was set at 5mA maximum tube current and my post processor has been adjusted to set the ‘dot’ federate at 2000mm/min and the ‘dash’ federate at 1500mm/min. Although my machine acceleration does not allow the dot federate to get anywhere near 2000 it does vary the burn time sufficiently to start to achieve consistent ‘burn’ results between the dots and the dashes. It is not quite right yet as a lot of detail in the hair has been lost but I am making progress. (don’t know if this make sense ??)

I still have a long way to go before I am fully satisfied with the results but more practicing will have to wait until after the holiday break.

Merry Christmas and a happy, festive, holiday to you all.

Tweakie.
Csatolások/Attachments: 4900207.jpg(27Kb)


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Amatőr Dátum/Date: Péntek, 2011-12-23, 14:09 | Üzenet/Post # 7
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tweakie, it's great job again!
Here comes out the significant difference between laser and mechanical engraving. A similar size picture takes more than four hours to Me with mechanical machining.
Quote (tweakie)
It is not quite right yet as a lot of detail in the hair has been lost but I am making progress. (don’t know if this make sense ??)

Yes, I think it is important to see all details, it will make better impression with the whole image.
You can try to set Your machine with some tests, I used this chess-pattern, it shows what to do for the best results.
Thank You for info, and I'm also interested about the next tests You will do. I suppose they will be better and better.

Have a Merry Christmas!


H1i.hu
 
KisKZ Dátum/Date: Péntek, 2011-12-23, 17:25 | Üzenet/Post # 8
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Quote (tweakie)
and it took just less than 1 hour to complete


Yes.....
This is why lot of peoples are thinking about change to Laser engraving from mechanical machining.

But...
I'm tried a 3W diode laser engraver on mirrors.
It was approximate same time like mechanical machining.
For quick work need more power.

Have a Merry Christmas!
 
tweakie Dátum/Date: Kedd, 2011-12-27, 12:32 | Üzenet/Post # 9
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Hi Guys,

Does anyone have an information or details on how they have connected an electromagnet to Mach3 for dot impact ??

This little chap was produced with the laser on MDF and comprises entirely of dots. What I would like to do is reproduce the same image using an impact magnet and then get some comparisons between the two methods from, essentially, the same GCode.

Thanks,

Tweakie.
Csatolások/Attachments: 0883819.jpg(81Kb)


Success consists of going from failure to failure without loss of enthusiasm.
 
Viktor Dátum/Date: Kedd, 2011-12-27, 14:38 | Üzenet/Post # 10
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tweakie, It's wonderful.Gongratulations.
 
tweakie Dátum/Date: Kedd, 2011-12-27, 18:40 | Üzenet/Post # 11
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Thank you Guys, you are most kind.

The cat image is 106mm x 130mm and because it comprises entirely of laser dots, theoretically, the same GCode could be used with an impact magnet and again it would take the same amount of time (80 minutes) to complete. Higher resolution and larger images would, of course, take longer but I still have a bit of reserve as far as the speed settings are concerned. It is all a matter of putting theory into practice biggrin

I am unable to post the GCode file in .zip format on this forum but for anyone who wishes to reproduce this cat image I have posted the .jpg / .bmp and GCode file I have used here.

Tweakie.


Success consists of going from failure to failure without loss of enthusiasm.
 
KisKZ Dátum/Date: Kedd, 2011-12-27, 18:44 | Üzenet/Post # 12
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Quote (tweakie)

Does anyone have an information or details on how they have connected an electromagnet to Mach3 for dot impact ??


Hello Tweakie,

Yesterday Viktor and Sanyi84 are spoke about this.

Viktor made a solution for it.

I will ask him for answer, the he or I'm will inform you about this.
I need a sort time for it.
 
KisKZ Dátum/Date: Kedd, 2011-12-27, 18:59 | Üzenet/Post # 13
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tweakie,

I like your work!!!
Congratulation!!!
 
KisKZ Dátum/Date: Kedd, 2011-12-27, 19:17 | Üzenet/Post # 14
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Quote (tweakie)
Does anyone have an information or details on how they have connected an electromagnet to Mach3 for dot impact ??


First sorry for my very pure English! I hope you will understand me.
If not, please ask me for correction!

What I understood about this yesterday.

Viktor use an unassembled magnetic valve with an hard iron pin in center.
For this have an circuit with a nessesary current and voltage.
This circuit switched with a relay. This relay got signal from MACH trougth a selected LPT pin.
Beni can write a nessesary postprocessor. Victor use now coolant pin, and Beni made change for it on postprocessor.

Sanyi84 told: It is not so good solution, because relay can burn in very early.

Sanyi84 have idea about an elektronic circuit solution using a FET for turn on and off power of magnetic valve (or a solenoid).
Yesterday night he work on it.

I will ask he for a picture or a schematic of this circuit.
 
tweakie Dátum/Date: Szerda, 2011-12-28, 09:45 | Üzenet/Post # 15
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Quote (KisKZ)
Viktor use an unassembled magnetic valve with an hard iron pin in center.
For this have an circuit with a nessesary current and voltage.
This circuit switched with a relay. This relay got signal from MACH trougth a selected LPT pin.
Beni can write a nessesary postprocessor. Victor use now coolant pin, and Beni made change for it on postprocessor.

Sanyi84 told: It is not so good solution, because relay can burn in very early.

Sanyi84 have idea about an elektronic circuit solution using a FET for turn on and off power of magnetic valve (or a solenoid).
Yesterday night he work on it.

I will ask he for a picture or a schematic of this circuit.


Thank you, I would be most grateful for any details or schematics.

Tweakie.


Success consists of going from failure to failure without loss of enthusiasm.
 
KisKZ Dátum/Date: Szerda, 2011-12-28, 19:12 | Üzenet/Post # 16
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tweakie,

A sort video about Victor's first test (with an simple iron):

Viktor's solution
 
Viktor Dátum/Date: Szerda, 2011-12-28, 19:35 | Üzenet/Post # 17
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tweakie, Hy.
This is not the definitive one yet.
Because he is not pointed the needle.
But his motion it.
 
sanyi84 Dátum/Date: Szerda, 2011-12-28, 22:00 | Üzenet/Post # 18
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tweakie,
Hi here the link of the electronic circuit.
circuit

A bar worked but was before it i had one 7414, 2 drawn solenoiddal I solved it, but better let the springy retraction, essence not stick up mechanicswise into the house of the solenoid, cannot be magnetized a spacer is needed. 5-8 Hz-t I managed to bring it out from him, the magnetic collapses slowly in the coil space. If my machine is ready possibly I start it single PWM es into an electronic circuit what is able to work with bigger velocity. Lpt which can be modulated naturally from a port.
Test the access anyway 5 v of os with a switch sign, no direct lpt first, it would be set before it one 74 14 you are right an opto . Viktor just works on this.

Z direction sign will be the sign of the solenoid, with acceleration and velocity/road length you can play with a proportion yet. First test rehearse it on a tiny surface if he stays at mechanics beneath before at works be looking for the reason of the jamming, but may be with too big velocity you want to knock.

I do not know indulgence in English, with a web translator reverse.


Az üzenetet módosította/Modified by sanyi84 - Szerda, 2011-12-28, 22:01
 
tweakie Dátum/Date: Csütörtök, 2011-12-29, 11:28 | Üzenet/Post # 19
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Hi Guys,

Well a big failure on my first attempt with the magnet.
I tried being smart by using my spindle relay to switch the magnet and mapping my B Axis direction (trigger) pin to Output #1. Unfortunately Mach3 does not like rapidly switching one of it’s Output # on and off and introduces additional delays (probably a buffer issue) while it catches up. This has resulted in the missed impacts and patterning shown in the picture.

Thanks for the circuit and other info.
I use the B Axis direction pin for triggering because I also use the Z Axis for laser focus and the rotary A Axis when working with compound curved surfaces such as eggs and this saves any conflict.
I have now constructed a dedicated magnet driver circuit (typical rat’s nest) which I will test today and report back with the results.

Tweakie.
Csatolások/Attachments: 3885622.jpg(64Kb) · 7178740.jpg(67Kb)


Success consists of going from failure to failure without loss of enthusiasm.
 
Béni Dátum/Date: Csütörtök, 2011-12-29, 11:56 | Üzenet/Post # 20
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tweakie, Hi!

Try to use M7-M8/M9! This is better than M3/M5.



http://dotg.weebly.com/
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