CNC Laser Ploter

His name is Karol (it’s Charles in English) has said “A ploter described here writes on dark plastic things with a DVD-RW laser diode. I did not made the mechanism with stepper motors which you can see on the photos below, I got it whole as it is and I don’t know where it comes from. With a complete and working moving table I had to build a driver for it. There was two solutions: make a simple transistor buffer to connect motors coils directly to LPT port and write a control program for my own, or make more complicated motor drivers with step/dir inputs and use one of commercial control programs, for example Mach2. I choosed the first solution, it was faster for me to write a simple program than to build complex motor drivers Electronic part of this project isn’t even worth drawing a schematic, becouse it’s only nine NPN transistors: eight to drive the motors and one for turning laser on and off.”

 

Low Power Laser by Tweakie.CNC

Tweakie.CNC – CNC Homebuilt router, mill, engraver, vinyl cutter.

CNC machine construction and operational details together with examples and samples of things that can be made and techniques used for small CNC machines. Low Power Laser as he said “

To drive the laser I am using an adjustable, constant current source which is capable of driving a 2 to 2.5 Volt diode at any current between 5 mA to >500 mA thus catering for most commonly available types. The laser diode used here is being driven at 170 mA which according to the manufacturers specification will produce 150 mW of laser output power (before the lens).

The drive PCB also incorporates a ‘TTL modulation input’ which will allow pulsed operation up to 15kHz and providing the pulse width is small enough and the PRF high enough (check with the diode manufacturers specification) the laser drive current, and subsequent output power, could be increased accordingly (an additional heatsink may also be required for this type of operation). I am, however, operating it in CW mode and as the specification for the modulation input is <0.5 Volt for off and >2 Volt for on, this has meant that I can switch the laser on and off using a signal derived from the Z axis direction pin of the LPT port. Therefore, by disabling any Z axis movement and manually focusing the laser onto the surface of the work I am able to use the same GCode file (vector graphics) albeit with a reduced feedrate that I would otherwise have used for conventional point engraving (+Z moves turn the laser off and –Z moves turn it on again).

 

Gear & Engineering Calculators and Tools

Custom manufacturer specializing in spur gears, bevel gears, helical gears and worm gears. Emergency Delivery for prototype gears and replacement.

Engineering Calculators and Tools Index — gears delrin gears plastic gears bevel gears spiral gears worm worm gears spur gears helical gears phenolic gears stainless steel gears cast iron gears steel gears miter gears metric gears hardened gears heat treat reverse engineering bronze gears horsepower miniature gears 120205:

 

 

DD-WRT firmware of wireless routers

DD-WRT is a third party developed firmware released under the terms of the GPL for many ieee802.11a/b/g/h/n wireless routers based on a Broadcom or Atheros chip reference design.

The firmware is maintained by BrainSlayer and is hosted at dd-wrt.com. The first versions of DD-WRT were based on the Alchemy Firmware from Sveasoft Inc, which is in turn based on the original GPL’d Linksys firmware and a number of other open source projects. DD-WRT was created directly from Sveasoft’s software decision to start charging for their firmware, closing the door to opensource.

At present DD-WRT is available for free although a different business model is being drafted by BrainSlayer in order to pay his salary, as this is his full time job.

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HTC Dopod 181Pro & User Manuals

HTC_Prophet: Currently sold as Qtek S200 / Dopod 818 Pro / Dopod 830 / Swisscom XPA S200 / O2 Xda Neo / i-mate JAMin / Orange SPV M600 / Vodafone VPA Compact S / T-Com T-One TC 500

HTC Prophet is similar to the Magician, but with a little bit varied design, Windows Mobile 5, Wifi (802.11b/g) and a 2 megapixel camera. However, despite it performs at 200 MHz versus 416 MHz of Magician, it?s not slower – it just needs some tweaking for better handling of programs running, such as overclocking through OMAPClock.exe.
(The development version of the Prophet was codenamed HTC_Athena, but this changed when there was confusion between the HTC Athena and the Quanta Computer O2 XDA Atom.)

 

Q: What is a dongle? KAI

A: A dongle is a security hardware key that protects copyright and prevents software piracy and is used with the Speed Step software package. It is attached to your computer or server via the USB or parallel port. Dongles which affix to the parallel port are either black (network), white (standalone) or yellow (standalone). Dongles which affix to the USB port are distinguishable by number. Network dongles begin with GB1SW, standalone begin with GB2SW. The use of the dongle confirms that you are the authorised user of the software. Dongles are common with commercial CAD software. They do not interfere with security arrangements of networks.

 

Homemade 3D Printer

This is a homemade 3d printer I’ve built from a Lexmark Z12 desktop printer.

Alvaro Fogassa said ” I’ve got too many e-mails asking me how it works,so i will try to explain it here.
whats needed besides the printer:

* 3 step motor drives
* 2 step motors size 23 with about 200oz/in
* Power supply(24volts x 5amps)
* The Pcbs and Bascom
* All the hardware (Iwill talk about that when I finish it.)
*The software to slice the .stl file and send it to the printer………”

 

CNC pencil sharpener for MR.KAI

 

DIY Lead Screw Nut

I found this CNC Trick with his CNC’s lead screw nuts, he decided to make them himself out of scrap. Here if a quick tutorial which documents how he made them. and also work all CNC story you can find in this site. I love this Site ;-0

 

Flip-top laser lighter

Gutted a zippo style lighter and inserted a blue ray laser module. The old fuel compartment houses the batteries. This is pretty cool, though it might take forever to actually light a cigarette with it. His build log is quite nice with diagrams and detailed pictures of the whole process.