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Topics - Tweakie.CNC

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Tangent Corner / Fear.
« on: October 06, 2017, 08:10:25 AM »
The local break-ins, burglaries and muggings had all started to get to me so…

I took down my Rebel flag (which you can't buy on EBAY any more) and, peeled the NRA sticker off my front window. I disconnected my home alarm system and quit the Neighbourhood Watch scheme. I bought two Pakistani flags and put one at each corner of the front yard. Then I purchased the black flag of ISIS (which you CAN buy on EBAY) and ran it up the flag pole.

Now the local police, sheriff, FBI, CIA, NSA, Homeland Security, Secret Service and other agencies are all watching my house 24/7.

I've NEVER felt safer and I'm saving $69.95 a month that ADT used to charge me.


Members Docs / The Write Wizard.
« on: September 21, 2017, 06:19:42 AM »
Here is John Stevenson’s introduction to the Write Wizard by German Bravo.


Show"N"Tell ( What you have made with your CNC machine.) / Trees.
« on: September 01, 2017, 06:34:55 AM »
I laser engraved quite a few variants on this theme (trees, flowers, etc.) some years back and following requests from friends I am now making a few more (non-commercial) and thought I would share a pic.


Tangent Corner / He just had to do it !
« on: August 22, 2017, 03:26:07 AM »
A picture from the past.


Tangent Corner / QR Codes.
« on: July 03, 2017, 07:39:22 AM »
This is just a test for me to see how well QR Codes behave.
Rather than use a private server I have taken the liberty of using a post in this section of our forum as others may also be interested in some experimentation.

I usually transport Gcode to the dedicated machine PC with a memory stick and this system works perfectly for me but it does not hurt to look at alternative or different methods.

It is very quick & easy to convert Gcode files into a .jpgQR (or other printable format) and it is then equally just as easy to scan that .jpgQR into the clipboard and then directly into Mach.

There are file size limitations imposed by QR image resolution issues but they need to be explored and that is the reason for this post. Obviously I would welcome others thoughts on this topic.


This is probably just a UK related issue but the shape of some of my mains plugs makes them rather difficult to grip and remove (especially when having slightly greasy hands). An easy removal device can be purchased but with a laser and some melinex (or similar electrically non-conductive material) they are very easy to make. This little device is easily fitted to the plug and it enables it’s quick and easy removal from any socket (using just one finger if desired).

I have included the .dxf file if anyone wishes to make their own.


Please take note – when laser cutting anything (particularly plastics) always use adequate fume extraction and take precautions never to inhale any of the vapours or particles produced.

EDIT: Reference to 'electrically non-conductive material' added after Brett kindly pointed out a weakness in my product description (thanks Brett).

Members Docs / Using the Parallel Port with Mach3.
« on: May 10, 2017, 07:56:08 AM »
Using the Parallel Port with Mach3.

Most computers nowadays are no longer provided with the old Cannon D type, 25 way, parallel port connector. Although this limitation can be overcome by installing a suitable PCI parallel port card there is a catch…

The old, original 5 Volt TTL standard (used in the days of parallel port printers) has to a large extent now been replaced with a new 3.3 Volt TTL standard. Many of our existing breakout boards and drivers etc. were designed for 5 Volts TTL operation and  these older devices may not operate correctly with 3.3 Volt TTL.

When buying a new PCI parallel port card, unless you are confident that your existing equipment will work with 3.3 Volt TTL, then, to be on the safe side, always get a PCI card which provides 5 Volt TTL outputs.

How do you tell the difference ?

Please refer to the following diagram (thanks to Phame)…

Firstly, ensure that your PC motherboard does in fact have a 5 Volt PCI slot.
Next choose a PCI card which has the correct cut-out position for the 5 Volt PCI slot.

This may not be a totally fool-proof method of choosing the correct 5 Volt PCI card but it at least lets us identify the 3.3 Volt cards.

One final note – the parallel port can only be used with operating systems up to (and including) Windows 7 and it cannot be used with any 64 bit operating systems.


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