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Author Topic: The Laser Project.  (Read 148184 times)
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budman68
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« Reply #470 on: August 14, 2011, 07:02:53 AM »

Ah, ok, thanks for that tweaks.

Any idea of the range of how deep/shallow the magent is actually pushing?

What type of tip is it? Is it blunt or?

Thanks again-
Dave
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Tweakie.CNC
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« Reply #471 on: August 14, 2011, 07:23:30 AM »

Hi Dave,

Andrea pioneered the magnet design which is driven from the Mach digital trigger by one phase of a bipolar stepper motor driver. The impact tip is, I think, tungsten carbide and it is ground to a very sharp point but what is perhaps most interesting is that it impacts the work on the return stroke so it is the spring pressure x travel distance (Z height) that determines the impact force and therefore the depth.

This Impact engraving is not something that will necessarily work 'straight out of the box' because my first attempts were just terrible but with the right setup the results are, I think, quite stunning.

Tweakie.



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budman68
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« Reply #472 on: August 14, 2011, 07:26:46 AM »


This Impact engraving is not something that will necessarily work 'straight out of the box' because my first attempts were just terrible but with the right setup the results are, I think, quite stunning.

Tweakie.



Thank you, and I wholeheartedly agree  Smiley
Dave
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« Reply #473 on: August 14, 2011, 07:30:44 AM »

Have you tried it yet ??

Tweakie.
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« Reply #474 on: August 14, 2011, 07:32:29 AM »

Have you tried it yet ??

Tweakie.

No sir, I meant the work that I've seen you folks doing with the impact engraver is stunning -
Dave
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« Reply #475 on: August 14, 2011, 09:50:36 AM »

hi Tweakie
Very interesting.
is it possible tell about time for last photo(dog) with mangnet Method ?
and pls dimension ?

thx
Amir
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manmeran
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« Reply #476 on: August 14, 2011, 12:00:44 PM »

i have a idea for build Magnet
by Air Valve Solenoid, magnet segment.

Amir


* Solenoid.jpg (139.71 KB, 480x640 - viewed 135 times.)

* sec1.jpg (17.58 KB, 961x691 - viewed 126 times.)

* sec2.jpg (25.89 KB, 961x691 - viewed 135 times.)
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« Reply #477 on: August 15, 2011, 01:49:45 AM »

Thanks Dave.  Wink

Hi Amir,

The image size is 90mm x 90mm with 0.15mm stepover. I don't remember the exact times but the laser took minutes (at 4500mm/min) and the magnet took hours (at 300mm/min).

I certainly like the idea of an air operated solenoid, particularly if it could be operated faster than a magnet.
Because the moment of impact lags behind the trigger event and the plugin operates in bidirectional mode, currently, any increase in feedrate beyond 300mm/min results in noticeably staggered verticals.
It's a challenge, but even a small increase in impact speed could reduce process time considerably.

Tweakie.
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« Reply #478 on: August 15, 2011, 02:55:28 AM »

Thanks Tweakie
about your cnc : ball screw driver or belt driver ?
in laser mode : how much max feedrate if we use belt driver for motion ?

Amir
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« Reply #479 on: August 15, 2011, 03:19:20 AM »

Hi Amir,

I use 5mm pitch ballscrews and my maximum, 100% reliable, G0 and laser feedrate is 4,500mm/min.

I doubt belt drive would improve my machine speed because of the mass of my combined X and Z axis but a purpose built machine could perhaps exceed 20,000mm/min without too much effort.

Tweakie.
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