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Messages - Tweakie.CNC

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4281
General Mach Discussion / Re: i must be totally stupid and dumb
« on: October 07, 2012, 04:57:27 AM »
Hi Belin,

LazyCam is OK for what it does but it has it’s limitations and quirks (perhaps like all software) and is really not that suitable to use for engraving work.

Most of my CNC work is with laminate engraving and I use Vectric VCarvePro http://www.vectric.com/WebSite/Vectric/vcp/vcp_index.htm which is extremely quick and easy to learn and use although it is perhaps not cheap to purchase. For general engraving work and for the price this software takes a lot of beating.

There are some free alternatives such as F-Engrave http://home.comcast.net/~sskroch/Fengrave/fengrave.html which I have found to be excellent. This software is pretty versatile and has enabled me, from one extreme to the other, to engrave text down to 0.5mm height http://www.machsupport.com/forum/index.php/topic,21525.msg150158.html#msg150158
 as well as V-Carving 12mm deep into Teak (using different spindles for each task, of course).

There is perhaps no easy route to the learning process but my recommendation is start with a simple, basic project, get plenty of ‘hands-on’ experience and spend some time browsing the forum. Once you have mastered the basics you will be surprised at just how easy it all is.

Tweakie.

4282
General Mach Discussion / Re: New startup
« on: October 06, 2012, 11:52:44 AM »
Hi Joe,

That's correct except than my SS is an early model and uses the USB to connect to the computer.

Tweakie.

4283
Show"N"Tell ( Your Machines) / Re: The Laser Project.
« on: October 06, 2012, 08:10:41 AM »
Hi Brett,

I had not even thought about measuring moisture content (I do have the equipment to measure that) but surface finish certainly does play a big part in determining the result.

Any thoughts or suggestions on the easiest way I can determine density ??

Tweakie.

4284
General Mach Discussion / Re: New startup
« on: October 06, 2012, 07:59:03 AM »
Quote
I have read that the laptop is not supported without some other device.  What exactly is that.

Hi Joe,

As Hood has said, laptops are not the ideal but if all else fails and a laptop is the only choice then you need an external motion controller and there are now quite a few different makes for you to choose from.

I purchased a Smooth Stepper (http://warp9td.com/), some years back, it is still working as well as the day I first connected it.

Tweakie.

4285
Show"N"Tell ( Your Machines) / Re: The Laser Project.
« on: October 06, 2012, 07:43:59 AM »
Thanks Brett.  :)

As always, learning as I go but different types of wood produce such entirely different contrast ratio's that it is very difficult to obtain a datum upon which to base comparative tests.

I am no expert when it comes to wood so I don't know exactly what type this is but the results were not what I was expecting. So far Obechi seems to give me the best contrast ratio so perhaps I should stay with that.  ;D

Tweakie.

4286
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: October 06, 2012, 02:14:45 AM »
Hi Pasquale,

I think you are on the right track with the voltage. I am currently using 72Volts but have found that fine control of the pulse timing can also provide an increase in repetition frequency. As long as the voltage is removed just prior to impact the rebound increases the speed of the return stroke.

I am looking forward to hearing more about your developments and progress.

Tweakie.

4287
Welcome to the forum guys.

Hi Belin, there are more girls here than you may think  ;)

Hi Pete, nice to have another member from the UK (I am just the other side of the Thames at Southend-on-Sea).

Hi Bse, If you post your question as a new topic in the general section it will get more exposure and someone will know the answer.

Tweakie.

4288
Mach SDK plugin questions and answers. / Re: Impact engraving plugin
« on: October 05, 2012, 12:26:38 PM »
Excellent work Pasquale.

What voltage are you using to drive your magnet ??

Tweakie.

4289
Show"N"Tell ( Your Machines) / Re: The Laser Project.
« on: October 05, 2012, 12:02:44 PM »
During recent work, using the Mach3 Impact / Laser Engraving plugin when engraving photographic images into wood (similar to the one shown in the previous post) it became apparent that in order to re-produce the lighter shades the required laser output power was burning too deeply into the darker portions and loosing some of the detail present in those areas.

To offset this problem I have made a small change to the plugin’s .dll to incorporate a user selectable Greyscale Compression feature the function of which is shown in the following picture. This function essentially alters the ratio of output pulses in relation to pixel value so that a different balance is achieved over the total range of values with the density of the low value pixels increased thus allowing laser output power to be reduced and create improved detail within the high value pixel areas of the work.

I hope this change may be useful to others using the plugin and the latest version of the .dll and it’s associated .pdf document can be downloaded from here;


Engraving.dll   http://www.cooperman.talktalk.net/Engraving.dll

Engraving.pdf   http://www.cooperman.talktalk.net/Engraving.pdf

Tweakie.

4290
Show"N"Tell ( Your Machines) / Re: The Laser Project.
« on: October 04, 2012, 03:45:31 AM »
This classic image of Ashley Olsen has been laser cut into Obechi.

This was produced using the Mach3 Impact / Laser plugin with a step-over of 0.2mm and a feed-rate of 3000mm/min. The laser beam was slightly de-focussed to cause a small increase in the spot size to create a better blending of the horizontal scan lines.

The dark areas essentially consist of carbon soot so images produced in this manner need to be sealed (perhaps using a lacquer spray) to make them more durable, if they are to be preserved.

Tweakie.


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