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Messages - Tweakie.CNC

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5291
Do you have evidence that it is a processor thermal trip that is causing the problem or could it possibly be something else ??

Just curious about this.

Also check your BIOS settings for over-temp sensing and actions to be taken.

Tweakie.

5292
It was my understanding that the processor thermal trip "shut down" the PC rather than triggered a "restart".  ???

Tweakie.

5293
Show"N"Tell ( Your Machines) / Re: The Laser Project.
« on: September 07, 2011, 11:41:28 AM »
Now I really don’t want my wife to find out about this but, after a lot of research, I have discovered that once these tasty little morsels have been laser cut they can be cooked to perfection using GHD “Pink Orchid” hair straightners (although the “Gold Classic” work OK the “Pink Orchid” are best).  ;D ;D

Tweakie.

(I should perhaps mention that nothing was wasted here as my faithful little helper rapidly disposed of all the offcuts).

5294
Show"N"Tell ( Your Machines) / Re: The Laser Project.
« on: September 07, 2011, 05:30:49 AM »
Something I perhaps didn’t cover very well earlier in this thread is “Air Assist”. This plays quite a key role when using the laser in two main areas and is, in my opinion, essential.

1) By directing the smoke / particles away from the focus lens this prevents contamination and the need for constant cleaning of this rather delicate component. (The lenses used at 10,6um are usually made from Zinc Selenide and AV coated – they scratch easily and are extremely brittle so the less they are handled the better).

2) When cutting anything that carbonises the air assist is used to remove the deposit from the bottom of the kerf and thereby increase the cutting / engraving efficiency.

I have chosen to use a co-axial air assist, for the most part, and have a 3mm diameter exit nozzle for both the beam and the air. This essentially pressurises the focus lens cavity and prevents the ingress of smoke and small particles. I use 3 different air supplies, the first is a low level, double acting, aquarium aerator which is always on whenever the laser is powered up, the second which is Tee’d into the same air line is a larger koi pond pump and the third is the exhaust side of a twin cylinder “Roc-r” pump (which is also used to power my vacuum table). All three of these pumps are oil-less and between them provide various air volumes for most applications.
Additionally I have a separate nozzle (not co-axial), which can be fitted when required, and can be used to direct a relatively high pressure “shop air” directly into the kerf. This is only used occasionally (when cutting plywood) and has the disadvantage that the high pressure / volume enables the fumes to escape the existing air extraction system (bad smell of burnt wood in the workshop).

When the little insects, shown in the earlier post, were cut I was using just the aquarium aerator, any greater volume of air would have scattered the individual pieces everywhere as no tabs were used.  ;D

Tweakie.

5295
VB and the development of wizards / Re: Filter for Start LED, OemLed(804)
« on: September 06, 2011, 10:46:37 AM »
There you go Terry, divulging the inner secrets with candour - the IG would never let you into my lodge  ;D ;D

Tweakie.

5296
Tangent Corner / Re: still kickin'.......
« on: September 05, 2011, 03:34:28 AM »
Dave,

Boats I have had in the past have had electric/gas fridges, smaller than the domestic variety but they have always run beautifully (electric when the engines are running and gas or mains electricity when in port. I suspect that the RV fridges are pretty much the same.

Tweakie.

5297
This is going to be a great project to follow.   ;)

Tweakie.

5298
General Mach Discussion / Re: Please Help: 3 MM error on X axis
« on: September 04, 2011, 03:50:36 AM »
Pleased it was something simple and that you have got it sorted.  ;)

Tweakie.

5299
FAQs / Re: help needed with emco pc mill rebuild
« on: September 04, 2011, 01:40:02 AM »
One other thing to check is the output voltage from your PC parallel port. With a multimeter check the voltage levels between any DIRECTION pin and GROUND (pins 18-25). When jogging the axis this voltage should change between approx. 0 volts and 5 volts depending on direction of jog. If it is only making 3.3 volts then this could be your problem.

Tweakie.

5300
Show"N"Tell ( Your Machines) / Re: The Laser Project.
« on: September 03, 2011, 11:50:14 AM »
Thank you Ya-Nvr-No,

Don't forget that we want to see pictures of your new build (shiny or not).  ;D ;D

Tweakie.

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