ivan.blogs.chimerical.com.au
Chess, Women and Music - CNC
http://ivan.blogs.chimerical.com.au/category/CNC.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. The standard parallel port pulsing setup in Mach3 uses a set kernel speed (25-100kHz) and this is the rate at which it decides to output a step pulse (or not). It is therefore also the maximum pulsing rate. The implementation details are specific to Mach3, but how would you determine an even pulsing pattern? Is a way to achieve this. This could be expressed as:. Var accumulator = 0.5; loop (X times). 1 12345678...
ivan.blogs.chimerical.com.au
A High(er) Power H-Bridge for Servo control - Ideas - Chess, Women and Music
http://ivan.blogs.chimerical.com.au/post/2011/08/25/A-High(er)-Power-H-Bridge-for-Servo-control-Ideas.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. A High(er) Power H-Bridge for Servo control - Ideas. Off the shelf servo controllers are quite expensive, thats why I decided to hack together my own. But if you want to apply some muscle - lower voltages (12V) just wont cut it. To get high power ( 1hp/735W) from 12V youll need to draw high current 61 Amps. Put simply, thats a 0.2Ω load. This presents some challenges:. A 61Amp 12V power supply. Theyre rare.
ivan.blogs.chimerical.com.au
Mill Rewiring - Chess, Women and Music
http://ivan.blogs.chimerical.com.au/post/2009/04/02/Mill-Rewiring.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. The ZAY7045 I have has an interesting feature. To start: Re-arm the E-STOP, switch it to Drilling/Milling and press the Start button (spindle turns clockwise). To stop: Switch it to Stop or press the E-STOP (spindle stops). To restart: Re-switch to Drilling/Milling and/or re-arm the E-STOP, and then press the Start button again (seems a little redundant). So, whats wrong with current controls? The E-STOP doesnt...
ivan.blogs.chimerical.com.au
A High(er) Power H-Bridge for Servo control - Prototype layout - Chess, Women and Music
http://ivan.blogs.chimerical.com.au/post/2011/09/03/A-High(er)-Power-H-Bridge-for-Servo-control-Prototype-layout.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. A High(er) Power H-Bridge for Servo control - Prototype layout. Ok So I laid out a board. This is layout for the prototype board. Im going to make a single-sided PCB on the mill, so bottom side tracks only and jumper minimisation was the goal. Basic H-Bridge Layout in Eagle. Bottom of completed board. A Proxxon Professional drill/grinder IB/E. Top of completed board. For an initial prototype - itll do. When...
ivan.blogs.chimerical.com.au
Backlash Blues - Chess, Women and Music
http://ivan.blogs.chimerical.com.au/post/2008/04/16/Backlash-Blues.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. Ive got my mill now, and Ive had a little play with it. One of the things Ive noticed is the amount of play in the hand-wheels before they move the table. After turning in one direction, the hand-wheel will move back an indicated 0.2mm before they engage again. This means if youre using the markings on the wheels alone, you may wobble about by 0.2mm. At the moment Im not looking to eliminate this movement. ...
ivan.blogs.chimerical.com.au
Losing steps in Mach3: Kernel Speed, Pulse Width and "Sherline 1/2 Pulse mode" - Chess, Women and Music
http://ivan.blogs.chimerical.com.au/post/2010/07/07/Losing-steps-in-Mach3-Kernel-Speed-Pulse-Width-and-Sherline-12-Pulse-mode.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. Losing steps in Mach3: Kernel Speed, Pulse Width and Sherline 1/2 Pulse mode. The standard signalling for hobby CNC axes is know as STEP/DIR. Two lines, one indicating direction (High/Low=Fwd/Rev), and the second is pulsed (Low to High to Low) to indicate a single step. A problem with this scheme is the possibility of this STEP pulse going by unnoticed. The Mach3 driver can run at frequencies from 25,000 Hz (pu...
ivan.blogs.chimerical.com.au
Generating Stepped Motion - Chess, Women and Music
http://ivan.blogs.chimerical.com.au/post/2012/07/28/Generating-Stepped-Motion.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. The standard parallel port pulsing setup in Mach3 uses a set kernel speed (25-100kHz) and this is the rate at which it decides to output a step pulse (or not). It is therefore also the maximum pulsing rate. The implementation details are specific to Mach3, but how would you determine an even pulsing pattern? Is a way to achieve this. This could be expressed as:. Var accumulator = 0.5; loop (X times). 1 12345678...
ivan.blogs.chimerical.com.au
Replacing Notepad with Notepad2 in Windows 7 & Vista - Chess, Women and Music
http://ivan.blogs.chimerical.com.au/post/2010/01/13/Replacing-Notepad-in-Windows-7-Vista.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. Replacing Notepad with Notepad2 in Windows 7 and Vista. Standard Notepad Just Isnt Enough. For a technical user like me, Windows build in Notepad.exe sucks. Its better than nothing, but its missing a stack of features:. Line numbers (status bar). Line numbers (its worth mentioning twice). Line ending LF (Unix), CR/LF (Windows) and CR (Mac) handling. Regular expressions in search and replace. Dont use it then?
ivan.blogs.chimerical.com.au
Overcoming NAT dropouts with BitTorrent & TP-Link TD-W8960N - Chess, Women and Music
http://ivan.blogs.chimerical.com.au/post/2012/07/05/Overcoming-NAT-dropouts-with-BitTorrent-TP-Link-TD-W8960N.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. Overcoming NAT dropouts with BitTorrent and TP-Link TD-W8960N. ADSL Modem/Routers like the TP-Link TD-W8960N must maintain connection information between internet (WAN) and local (LAN) machines. Id been having issues with connections freezing after a minute or so:. MS-Outlook failing to send/receive. MS-Access connections to a remote SQL database would give errors. For me, this returned 2024 and 2024. The r...
ivan.blogs.chimerical.com.au
A High(er) Power H-Bridge for Servo control - Initial Tests - Chess, Women and Music
http://ivan.blogs.chimerical.com.au/post/2011/09/06/A-High(er)-Power-H-Bridge-for-Servo-control-Initial-Tests.aspx
Programming, like chess, women, and music, has the power to make men happy" - Gerald Weinberg. A High(er) Power H-Bridge for Servo control - Initial Tests. So, with my prototype assembled, it was time for some basic signal tests. The first thing that became obvious, is that my CRO is quite dusty - but I think it adds character. Anyway, on with it. Lower trace (2V/5µS/div): 3.3V input @ 25Khz 50% duty. Upper trace (2V/5µS/div): 5V output of the opto-isolator. The gate drive to the lower mosfet. As soo...