Re: [HELP] RUMBA burned
Can you desolder that diode? Looking at the schematic it looks to be D6.
View ArticleRe: Was this due ON/OFF switching?
to me it looks more like there was just a bad connection there, aka a loose screw, and it heated up and maybe was arking a little bit.
View ArticleRe: RAMS or Megatronics for stepper control (not for 3d printer)?
RAMPS is mainly just an interface boards for stepper controllers, with Megatronics being that same board with an Arduino Mega on board. They also provide a few inputs (thermistors and end-stop), and a...
View ArticleRe: problem with stepper motors
Quotenantou In full step mode (no jumper) ... When I added jumper and set to 1/4 stepping mode all problems was solved. I have a similar issue where my setup (ramps 1.4 + A4988 drivers + marlin) are...
View ArticleRe: problem with stepper motors
The jumper settings are best found in driver IC documentation. Or perhaps try pololu site, if thats what you use then their site also have good documentation. There are 2-3 lines for each driver that...
View ArticleRe: [HELP] RUMBA burned
Yes, I think it's possible. As you say, it should be D6, it has sense... What I don't know is how to get it's specifications, I don't know if I go to a electronic store and say "M7 diode as this...
View ArticleYour opinions on setting Vref
Hi all, I've never correctly set my Vref, but never had any problems on both of my printers. I was wondering, what the general experiences are with setting Vref, for me it has always been setting the...
View ArticleRe: Rumba short circuit
I looked at the schematics and the Elko im talking about is C1, its the first elko after my power supply so does it makes sense that it burns first when a short circuit happens? [attachment 24317 C1.jpg]
View ArticleRe: Rumba short circuit
It doesnt make much sense for that to fail, unless voltage got over its rating or it got applied in reverse. In which case probably other parts are burned also - that cap most likely wouldnt fail...
View ArticleRe: problem with stepper motors
ooohhhh, there's header pins hiding underneath the pololu breakout boards. I never realized there were jumpers across these pins before. My other ramps boards had them preinstalled, this board just...
View ArticleRe: [HELP] RUMBA burned
Today I'm happy again, I solved it! As askhlut pointed out (thank you!), it was the D6 diode. I went to an electronic store and they sold me a generic diode that works for 24-35V. I desoldered the...
View ArticleRe: Your opinions on setting Vref
On an A4988 it's usually easy to adjust them by feel, but with the DRV8825's, that rarely works. The one thing that adjusting by Vref does do, is hopefully eliminate the stepper drivers as a source of...
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Re: RAMS or Megatronics for stepper control (not for 3d printer)?
I'm just need a controller for DIY telecine project. I need 4 nema 17 steppers to turn in unison, I found this made in china CNC controller, but the sounds (vibration) of the motors at low RPMS is...
View ArticleRe: RAMS or Megatronics for stepper control (not for 3d printer)?
It uses the same drivers has the ramps board. You might even just want to look at some of the arduino examples if all you want to do is turn them all the same. A proto board and a little soldering...
View ArticleRe: RAMS or Megatronics for stepper control (not for 3d printer)?
Since they're all moving at the same time, you could simply drive the inputs in parallel (ie: hook up a bunch of driver boards with their minimum components, connect step/dir/enable in parallel to...
View ArticleRe: Your opinions on setting Vref
Ah, so the reason would be to create as less of variables possible to mess-up the configuration. Sounds logical. On my other printer I have imitation Pololu's and they also were quite easy to setup. I...
View ArticleProblem with Melzi or thermistors
Hi all, I have built a Mendel90 everthing is fine I like to start printing. But there is one single problem that I cant get solved. In Pronterface there is shown a too high temperature in hotend and...
View ArticleRe: RAMPS for Due!
I have updated the schematic and layout with some thermistor changes and other things Cefiar mentioned. I have routed a separate ground from the thermistor header to two of the ground pins on the Due...
View ArticleRe: RAMS or Megatronics for stepper control (not for 3d printer)?
What about using a driver such as DQ420MA , Motors 42BYGHW208 1.8, 12V, 0.4A, 4wire. [www.youtube.com] motor [www.wantmotor.com] driver [www.wantmotor.com] Seems driver is able to support up to...
View ArticleRe: RAMPS for Due!
I'm not a big fan of series diodes. You paid good money for that power and now you are just throwing it away :). There are some pretty cheap D2PAK dual diodes out there with big current ratings. The...
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