Show all posts by user
Prusa i2, Prusa i1, Prism, Sells, and other Mendel variants
Re: avrdude error - 14 years ago
I guess so. I had thought - at least for microswitches which I'm using - it might be possible to simply connect them in series or parallel which would probably be OK if it were being used as a simple two pole switch. I wasn't sure if something similar was possible when using all three contacts as in the Gen6.by dnaman - General Mendel Topics
Re: avrdude error - 14 years ago
Following backing up the existing firmware, I modified the configuration file and uploaded it, by the book, absolutely without incident. Everything now homes in the right direction and travels the correct distance. I note the configuration has provision for a second set of limit switches at the opposite end of travel from the home position. How would these be wired to the gen6 electronics?by dnaman - General Mendel Topics
Re: avrdude error - 14 years ago
Joe90 Wrote: ------------------------------------------------------- > Can you > use the Arduino programe to upload, if so try the > method above. Well, I wasn't trying to upload at that point of course - simply to backup the existing firmware and following the method recommended in the wiki. Possibly you can do this through the Arduino program but I wouldn't know how. And since the Aby dnaman - General Mendel Topics
Re: avrdude error - 14 years ago
That thread appears to be directed to helping a user run avrdude on a Mac to backup the firmware but doesn't deal with the situation if it produces an error. As far as that method is generically applicable to the PC, its what I did - except mine was run from a command prompt which I assume is the Mac's "terminal mode" and the port used was COM4. Avrdude appears to run, but gives the error that Iby dnaman - General Mendel Topics
Re: Mendel prusa with 2 stepper drivers for Z axis: experiences? - 14 years ago
Yes, thanks, I did have that droftarts and I will change the firmware for this and also the z-axis scale. Right now though I'm getting an avrdude error when I try to back up the existing firmware ... see separate thread.by dnaman - General Mendel Topics
avrdude error - 14 years ago
I have my Prusa basically working now with Gen6 electronics but need to update the configuration for the X and Y directions and Z-axis scale. I wanted to back up the existing firmware first. The Gen6 wiki says: You can back up the factory installed firmware using avrdude just in case. If you are on Windows substitute the right COM port for the -P option: avrdude -c avrisp -b 38400 -i 10 -p mby dnaman - General Mendel Topics
Re: Prusa electronics - 14 years ago
I'm just a little ahead of you. I dug around for a copy of RepSnapper. It will let you manually drive each axis backwards and forward and also, when you get that far, will let you print a part using an STL file or Gcode. You'll also need the USB driver for your Gen6 board. Both Repsnapper and the driver can be downloaded from the Mendel-Parts site.by dnaman - General Mendel Topics
Re: Mendel prusa with 2 stepper drivers for Z axis: experiences? - 14 years ago
droftarts, I wired mine front-left (on the bed) but the software/firmware homes back-right and therefore doesn't find the limit switches. It did occur to me that either of the other two corners would flip the part. OK, one way or another I need to get the limit switch positions to agree with the software. The advantage of the switch being near the motor and simplifying the wiring doesn't reallyby dnaman - General Mendel Topics
Re: Mendel prusa with 2 stepper drivers for Z axis: experiences? - 14 years ago
Just an update on my Prusa. I made solid couplers as planned and re-aligned everything. This reduced the z-axis runout enormously. Still very little action when the motors were connected in parallel - intermittent spurts of activity but mostly it just sat and buzzed. So I wired them in series. Still no drive just buzzing. While looking through the Printer Definition options in Repsnapper, I chaby dnaman - General Mendel Topics
Re: Mendel prusa with 2 stepper drivers for Z axis: experiences? - 15 years ago
The power supply is an X-Box supply like this: EBay PS It's quoted at 14.2A which should be enough hopefully. Thanks for the info on setting the current ... about the only place I didn't look, sorry. First things first though. With the motors still in parallel, I played today with reducing the z-axis speed. It helped slightly but more importantly led me to believe that the crummy z-axis motorby dnaman - General Mendel Topics
Re: Mendel prusa with 2 stepper drivers for Z axis: experiences? - 15 years ago
droftarts Wrote: ------------------------------------------------------- >Mine are wired in series (see the second > post here > > opic.php?f=35&t=407), rather than in parallel as > suggested by the wiki The mendel-parts forum suggested reducing the current when connecting in series. Did you do that and how is it done with the Gen6 electronics? (My z-axis won't run at all cby dnaman - General Mendel Topics