Re: SmoothieWare Compatible Mainboards
QuoteTraumflug QuotevreihenI know zilch about OSH requirements. 600+ posts in this forum and then this? You're kidding, aren't you? Think of what you'd need to make an identical copy or a slightly...
View ArticleRe: RepRapDiscount Full Graphic Display Only works from USB power after press...
You have plugged you endstops in wrong. they are now shorting 5v to grd when closed. This has killed the voltage regulator on the mega.
View ArticleRe: RUMBA - plugged in motor driver the wrong way, now windows doesnt notice...
Hi, thank you for your fast reply! I just removed all stepsticks, endstop-, thermistor- and motor Connectors and jumpered to USB Mode, still no connection. I dont have a multimeter so i´m kind of...
View ArticleRe: RepRapDiscount Full Graphic Display Only works from USB power after press...
QuoteDust You have plugged you endstops in wrong. they are now shorting 5v to grd when closed. This has killed the voltage regulator on the mega. Is this easily replaced? Thanks for your reply.
View ArticleMelzi - Not working X-axis
Built from a kit of Huxley. Motherboard Melzi 1284p - prepared by the seller. Not working X-motor. Commands are sent, but the engine is idle. Motor ok - checked on the Y-connector. I believe that an...
View ArticleRe: SmoothieWare Compatible Mainboards
QuotevreihenHonestly, the software side of open-source makes me want to pull my hair out with all of the different licenses out there. That's why we currently pretty much ignore licenses by handling...
View ArticleRe: SmoothieWare Compatible Mainboards
"A wise man knows that confidentiality equals profit." - The Ferengi 30th Rule of Acquisition "Even if it's free, you can always buy it cheaper." - The Ferengi 11th Rule of Acquisition "Sometimes what...
View ArticleNEMA 17 motors not working
I have 5 NEMA 17 motors of which only 2 work (X and Extruder) I have tried plugging the motors (Y motor and both Z motors) into the X position on the RAMPS 1.4 board. However I cannot get any motion...
View ArticleRe: NEMA 17 motors not working
I think one can assume that these pinouts are very well tested. I'd connect the other axes to the X axis to find out wether these motors work at all. Especially cheapo "Pololus" are known to often not...
View ArticleRe: Melzi - Not working X-axis
Same as in the other thread: connect the X stepper to a working axis to find out wether it works at all. And always power down before disconnecting a stepper.
View ArticleRe: NEMA 17 motors not working
Hi there, I attached the X motor to the other axis slots and the X motor works in all positions (Y and Z) So the pololus are not the issue.. I have tried switching one of the coils on the offending...
View ArticleMOSFET specs for RAMPS
I want to buy a MOSFET in the UK to switch an additional 12v fan under control of one of the GPIO pins, and I'll get a couple of spares in case I ever need to replace the ones in my RAMPS. I shall...
View ArticleRe: MOSFET specs for RAMPS
Here's one in the UK for just 2 pounds, no shipping >> Ebay UK
View ArticleRe: Melzi - Not working X-axis
Then the stepper drivers are at fault. Too bad they aren't replaceable.
View ArticleRe: MOSFET specs for RAMPS
QuoteplanktonCan anyone tell me what the important specs are if I'm looking at other models? See [reprap.org]
View ArticleRe: Melzi - Not working X-axis
You're probably right. I asked for a replacement from the seller.
View ArticleRe: MOSFET specs for RAMPS
Okay, probably my fault, I should have been more specific. I need to order from this company if possible (in order to make up a minimum order value), I also like to try to understand what I build, and...
View ArticleRe: MOSFET specs for RAMPS
Apart from the parameters you mentioned, the other critical one is Rds(on) measured at Vgs= 4.5V. Multiply this by the square of the maximum current that the mosfet will be required to pass to get the...
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How do I properly measure the current of power supply?
Hi, I just converted cheap 450W ATX power supply to 12V one for RAMPS 1.4 controller. The current output of this unit is total +12V@30A (+12V1@14A, +12V2@16A). I merged all +12V wires into single...
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