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Discuss here what makes your printer moving.
Re: Reprap Electronics Devolpment - 16 years ago
I think there is a lot of underestimating the software costs. This is usually described in units-per-free-time-interval. Or in Tecklish UPFTI. Many call this wasting time. Some of the ATMEL workshops I attended did AVR in the morning and ARM in the afternoon. Arm is much more a complete solution as the early iPods used ARM processors. Are we building printers or iPods with touch screens heby sheep - Controllers
Re: Does anyone use AVR studio to program their chips? - 16 years ago
I have been using ATMEL chips and Avr studio for about 10 years. This is probably why I still program in asm, as I have a lot of code written. When I started I coded 8051 so a bunch of that code got ported into my archives. I also have a little sub micro kernal, which allows me to run code inside three different threads. I do install the C compiler (WINAVR-gcc) Usually I can do the same thiby sheep - Controllers
Re: Atmega168 Shortage? - 16 years ago
I have a tube of 10 of them. Well one is in use, but the other nine I think are still in the tube. Most of my designs use the Mega88 which I have a lot of too. If one is surrounded by rare and unusual things, does that mean that they are still rare and unusual? -julieby sheep - General
Re: Reprap Electronics Devolpment - 16 years ago
Quotefreds Wrote: ------------------------------------------------------- > I think he is talking a full IDE debug enviorment, > with the ability to set break points, interrupt a > running program and examine variables in context > etc. > > With the primative IDE for the Ardunio you end up > with verbose output statements to prove chunks of > code are running, etc. Theby sheep - Controllers
Re: Reprap Electronics Devolpment - 16 years ago
Quotecasainho AVR don't have Free/Open tools for debug :-( ??? ??? ??? ??? While AVR Studio is not open, It is most defiantly free. Sometimes they want some registration info. Usually I get the latest build from atmel.no/beta_ware/. Studio uses the WINAVR gcc suite, which is free and open, although this does require a Window$ machine. I patched the older JTAG ICE code to run on the butterby sheep - Controllers
Re: PORT defines - 16 years ago
I mostly program in assembly. The syntax is much the same with the port defines. What differs is what the pin on the port does. Since the Arduino and Sanguino use different processors, the functions on a given port may be on different pins. -julieby sheep - Sanguino(lolu)
Re: 2010 Bay Area Maker Faire 
- 16 years ago
I expect to be helping out in the E.R.P.S display. If I get a chance I'll see if I can look you up in person. -julieby sheep - General
Re: Human Interface for firmware: Buttons and displays. - 16 years ago
hd44780 is what I use a lot, The main issue is that these things eat pins, At least 7 pins are needed, which is most of a port. When the processor supports external memory, I like to memory map the LCD, this way reads and writes are DMA mapped, which is useful for debugging. One of the first Atmel projects I worked on was to interface one of these units in 4 bit mode. While 8 bits seems easby sheep - Firmware - experimental, borrowed, and future
Re: Entry page for site - 16 years ago
I used the find, to locate the knurling page. This precludes two things that I know what to search for and that the relevant page contains useful information. How the data is structured, reflects how valuable the tool is. I like to browse library stacks. This way one can locate similar related subjects on a topic. Modern libraries want to used compressed storage for the stacks so that thereby sheep - General
Re: How Can you Make a USB to TTL cable for Sanguino? - 16 years ago
see this thread and this photograph: For the Sanguino, the Max232 is not needed. It helped that I ordered a bunch of FT232 chips a few months back. I made the PCB becouse I needed something to mount the tiny pins onto. -julieby sheep - Controllers
Re: Entry page for site - 16 years ago
I noticed this too, as I keep the reprap.org page bookmarked. Actually I like the Wiki page It looks a bit cleaner. What is needed on the Wiki home page, are links to these forums, somewhere in the top left side (for english lanquage readers) to click on. There should also be a quick link to the main static page. One thing I find awkward with the Wiki pages is that there are no tree views.by sheep - General
Re: questions to the "old hands" about the 1.2 stepper driver - 16 years ago
Ironically it was replacing the fans in my existing CNC controller that got me active here. The new ones glow blue when turned on. Makes it look interesting inside. The blue fans were 1/2 the price of the plain black ones. Perhaps Henry Ford knew something we did not. -julieby sheep - Controllers
Re: questions to the "old hands" about the 1.2 stepper driver - 16 years ago
Since I had the camera out, I took a picture of the v1.2 board I made a few weeks back. I still have not tested it, so the main chip is out. When I took the BOM to the store it said large heat sink. So I got the largest one that would fit. I think they used these heatsinks to make spaceship models in starwars type films, It has two large fins that come out over the side. -julieby sheep - Controllers
Re: DIY PCB Questions - 16 years ago
It has been many years since I made a PCB. Needing a USB converter and having a lot of FTDI chips, I found a scrap of some old PCB board and the toner transfer paper. The scrap was pretty well oxidized from the years. I scrubbed it clean. My laser printer is getting long in the tooth, I cranked up the darkness to max. Even so the resulting image was a bit weak. This time I set to use thby sheep - Controllers
Re: min interfering with stepper movement - 16 years ago
I am a bit confused? Are the signal lines to the endstop inputs open? If so these can float either way if nothing is driving the line. Another watch point, is if the sensor lines are run with the stepper lines, there can sometimes be enough crosstalk from the motor back current emf to cause false reading. On my 20 year old CNC, there is enough back emf that if I have a lamp plugged into theby sheep - Controllers
Re: Mechanical Computing Working Group - 16 years ago
Larry; I mentioned the connection between Swilguie's lunar calendar and the Vannevar Bush differential analyzer in passing in the second to last paragraph. Lucky you to be able to write a dissertation on this subject. Something I would really like to do, but have not found the right history department to do the degree in "History of technology." that I would like. In the good ol U. S. ofby sheep - General
Re: Motherboard Shield thoughts - 16 years ago
Don't be too quick to dismiss SMT assembly. I just built the through hole version of the stepper controller v1.2 With the LM297/298 and the Gen 3 motherboard (also labled v1.2) I completed the motherboard in a fraction of the time it took to make the stepper board. The stepper board has been the first through hole project I have built in a number of years. It was actually more difficult thanby sheep - Controllers
Re: What's the cheapest way... - 16 years ago
If you can live with full and half stepping, there were blank v1.2 stepper controllers when I last looked. Jameco had the LM297/298 driver pairs. most of the rest of the parts can be had at Fry's electronics. I was also in the last two weeks able to get one of the Gen 3 (v1.2) motherboards. Granted I have a decade of experience with SMT and most of the components at hand. It would be niceby sheep - Reprappers
Re: Human Interface for firmware: Buttons and displays. - 16 years ago
That looks a lot like this tutorial from the AVR forum. I was thinking of playing about with this once I have some of my hardware working. I built one of the stepper v1.2 LM298 board I got last year. I also found some nice NEMA23 motors which only require 1 Amp at 3 volts, so have something smaller than the coffee cans to experiment with. Also found a NEMA17 from a scanner in the spares box.by sheep - Firmware - experimental, borrowed, and future
Re: Motherboard v1.2 arrived - 16 years ago
I have a lot of HC595 shift registers. That is what I use on my MIDI boards. Daisy chained out for as many notes as I need. TI also makes a high current version which can directly shunt a 2 amp coil. This is a tpic6b595. Mouser was supposed to get some in this month, Now the due date is July While at the right baud rate serial can be faster than parallel, it is much harder to program and debby sheep - Controllers
Re: Stepper Motor Driver v2.3 - Makerbot out - 16 years ago
Some years ago a group similar to this one designed a system for reading piano rolls. This system used a stepper motor and pinch wheel to move the paper past an optical scanning head. Some systems were built which used an off the shelf scanning chip with an integrated stepper driver. This chip came in several flavors, the one we used was designed to connect directly to PC parallel ports. Othby sheep - Controllers
Re: Human Interface for firmware: Buttons and displays. - 16 years ago
I have the basics on my controller v1.2 assembled. I posted to the thread I started in the electronics forum with the link to the blog post. The changes I made to the old MIDI FAT firmware, ported over without much issue to the actual mega644. I had to adjust some of the sram parameters for the larger memory. There were also some complaints regarding the USART names as the 644 has two USARTSby sheep - Firmware - experimental, borrowed, and future
Re: Motherboard v1.2 arrived - 16 years ago
I updated my blog With the details and photos detailing some of the input power modifications I made. The 3.3volt regulator I got does not match the footprint of the suggested modification. This regulator has the output on the center pin. When I wrote the above posting, I had not looked at the modifications in detail, so there is no real need to scrap the RS485. I still have not populated thiby sheep - Controllers
Re: newbie - 16 years ago
Simply go to the reprap.org homepage. On the left is a menubar, where you found this selection. You probably overlooked the button marked Make your own reprap. This will take you to the reprap wiki. The files are stored on sourceforge, linked to by the above wiki pages. You can download them directly or use a cvs tool to get the latest versions. Reprap is a complex project that is evolviby sheep - General
Mechanical Computing Working Group - 16 years ago
From another thread. QuoteSebastien Julie, let me know if you want to start up a Mechanical Computing Working Group. I'd suggest a thread to begin with, and then grow that into its own forum. I have a hidden agenda: I want multiple gear families in the wiki as part of RBS. Also, mechanical computing is cool. Would you like to upload your 3D models of Adding Mechanisms here or here This mayby sheep - General
Motherboard v1.2 arrived - 16 years ago
Last week I ordered one of the blank v1.2 motherboards from makerbot. It came today. I was not expecting it until at least tomorrow. It looks like the surplus SD/MMC cards are fit. Some of the sheild ground pins are in a different place. The mounting holes and signal pins line up perfectly. I should be able to clean off some solder mask for the ground pins. The first step will be to bringby sheep - Controllers
Re: ABS extruded filament - 16 years ago
Where are you located and do you have a website? -julieby sheep - For Sale
Re: Where is mendel BOM -- Open office is dead - 16 years ago
Enough is enough. My questions were answered promptly and I got the information needed. I was going to start a new thread noting my blog, which like my CNC machine tends to become neglected for years at a time. My personal blog has been updated with some more sheepish nonsense relating to my experience with some of the abstractions dealt with here. Anyway the blog is at delectra.com/toys Iby sheep - General
Re: Where is mendel BOM -- Open office is dead - 16 years ago
I use PDF. Naturally. Hand coded inside of wordpad or teach-text. Postscript is the perfect language. Over 30 years old it has few bugs. Actually mostly I have had to deal with word and excel. The latter I have been using since it was called Multiplan. None of this is my choice, I have to use what my employers, clients and family use. I have never seen a bug in these programs, although Iby sheep - General
Re: Gen3 electronics mod for Mendel - 16 years ago
I think I see some of the confusion now. I have the 20091007 version of the eagle layout on my computer. I was going to etch this myself, but noticed that makerbot had blanks in stock, so ordered one last week. Looking at the highlighted lines in Eagle, I see several different power buses. The schematic reflects the ATX supply version. The modification takes 5 volts from the USB header on wby sheep - Controllers