I've got a 24 Volt PSU. A quick check on tells me that you can run the Pololu stepper drivers (Vmot) at 8-35V. The drivers regulate the voltage as well, so I should just have to worry about Vref. So I think this should be ok in theory, anyone have any practical experiences? Is there any unforeseen problems that might haunt me if I do feed the Sanguinololu board 24V?by wixi - Sanguino(lolu)
Thanks Traumflug, I should have put a more specific link, . Yep, that component would do the job, I've also found the equivalent 5.6ohm 5W resistor on Farnell. I must have been half asleep the first time I searched! Both ones we've found seem longer and thinner than the UB5C-5.6-ND, but I suppose I can machine the Jhead nozzle to fit =)by wixi - Plastic Extruder Working Group
Does anyone know where to order the heater resistor UB5C-5.6-ND for the J Head nozzle. I couldn't find anything similar on Farnell or Radio Spares.by wixi - Plastic Extruder Working Group
The two z motors would be in parallel so I would have though half the current goes through those ones. But useful to know, thanks =)by wixi - Sanguino(lolu)
I know =) I thought 1A would be OK for testing out one stepper motor on its own. I was being paranoid since I was using an undocumented motor I found lying around. I'll use a bigger PSU for everything. The mystery is why the fuse would blow when I didn't have the stepper motor connected. It's probably not worth pursuing for now since the motor does behave now. Would you say the current usage foby wixi - Sanguino(lolu)
Very good point, thanks =) I jumped pins 1 and 3 on the end stop molex connectors. So yes I have movement in both directions! The fuse blowings is still a mystery...by wixi - Sanguino(lolu)
I am test driving my stepper motors, alas, nothing is that simple... Symptoms include only positive movement and PSU fuse blown twice. I have soldered together my Sanguinololu 1.3a board, which has Sprinter firmware already installed on the Atmega644P chip. My laptop has Printrun installed on Ubuntu, (http://reprap.org/wiki/Printrun I followed these instructions) Here is what I did, (warning,by wixi - Sanguino(lolu)
A related question to calibrating Pololu drivers (A4988). I have assembled a Sanguinololu board. Should I use a separate breadboard to calibrate each of my stepper drivers? Or can I check each one placed in its position on the existing board which should be able to provide the right grounding and power to the pins.by wixi - RAMPS Electronics
Can anyone recommend free software to view the Sanguinololu 1.3a .brd and .sch files found at ? Preferably something that would also work on Linux and is not over bloated with features =)by wixi - Sanguino(lolu)
It turns out that my laptop (and other PC) didn't have the right drivers. The OS searched for the drivers with its Found New Hardware Wizard, it showed correctly on the Device Manager and I could talk to the chip with putty =) For completeness sake I still have no idea about how you would do it on Linux. If anyone knows it might be useful for the wiki.by wixi - Sanguino(lolu)
In XP OS: What do you mean by "open up the ports section"? Do you mean expanding the list of devices in Device Manager? I can give a screen shot if its helpful. I have putty but I wouldn't know what COM port to use. In the instruction video, COM12 was used which showed up nicely in the Device Manager. But I think I need to set up the COM port properly before I can use putty.by wixi - Sanguino(lolu)
I'd like to ask more about plugging in the PCB via the USB port. Quote] Now is a good time to test the FTDI chip. Plug a USB cable into the port. The device should show up as a COM port or a TTY device and allow it to be opened. If you temporarily connect the 'TX' and 'RX' pins on the USB2TTL port on the back of the board anything you type in your terminal application (such as PuTTy) should beby wixi - Sanguino(lolu)
This is an interesting discussion. From a newcomer's perspective, I can see two themes emerge: One seems to be the merit and establishment of a particular RepRap design; I don't know enough to comment about all the variants and communities involved, but I can the potential for vested interest. This looks like its becoming more political, which would dissuade some people. The other seems to highby wixi - General
Traumflug Wrote: ------------------------------------------------------- > I may want to use stepper motors other than NEMA > 17, I've already a few assorted ones in the > workshop, should that affect my choice? > > No. All three, RAMPS, Sanguinololu and Gen7 use > the same stepper driver boards. A useful thing to know. It would mean RAMPS would be better since I could potentiby wixi - Controllers
Here's someone who took this concept a bit too farby wixi - General
Partly to stave off analysis paralysis, I wanted to ask the community what electronics I should choose. I'm planning to build some sort of Prusa RepStrap. There seems to be two main choices, RAMPS and Sanguinololu, this RepRap wiki electronics page seems to have the best comparisons, but it would be interesting to hear the latest information and reccomendations. I may want to use stepper motby wixi - Controllers
Yes, I've had success with 2D projections in scad files, thanks I call projection() just after the module object. module partname(){ object code blah... } projection(cut = true) Adding transformations like translate() and rotate() can be unpredictable but I get better results when I call them after projection(). It does seem a bit of a hack, IMO it would make more sense to import .scad fileby wixi - General
@julianh72 Thanks for the suggestion, I exported the barclamp-stl with EasyFIT but the new copy has the same problem It seems that rules out notation problems, though I can't be sure.by wixi - General
@nophead Thanks , I've had partial success with your suggestion. Once I've exported the dxf file of the 2D projection I used LibreCAD to make my measurements, . However the 2D projection requires importing an stl file, import("/path/filename.stl"); which compiles fine using F5 but generates an error when rendering F6. I checked all the stl files in the latest metric-prusa-lm8uu files, these oby wixi - General
I'm living in the Edinburgh area. I just found out about and they were connected with the Edinburgh University Informatics RepRap construction. @rankbajin are you involved with the Edinburgh hackerspace? You seem to have made good progress with your RepRap .by wixi - Reprappers
Also, as part of my plan to machine the simple parts, I'm having difficulty finding out the exact dimensions of the printable parts. I have downloaded the .scad files from github and can view them on openscad. Is it possible to export diagrams with the relevant dimensions?by wixi - General
After keeping an eye on the RepRap project for over a year, I'm finally getting round to making my first Prusa. I think I have two main questions. I have access to a workshop rich in vitamins and tools. So I believe I can machine some of the simpler printable parts like the frame vertex while just buying the complex parts. Is it realistic to just order specific parts only? Are there sellers tby wixi - General