Re: Reprap Arduino Due Shield project - looking for helping eyes.
STB Wrote: ------------------------------------------------------- > Some thoughts on MOSFET switching. Gate drivers > for the MOSFETS are mandatory, driving the gate > with 3.3V results in...
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Re: Reprap Arduino Due Shield project - looking for helping eyes.
A 74lvc07 might be a solution. You can drive up to 6 MOSFETS. Use 12V instead the 5V supply on the picture. A good value for R is 270 Ohms. Switching frequency in this case should be slow (hundreds of...
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
Regarding gate drivers: IMO this depends on what FET is in use. I know I want to move away from the STP55NF06L's as they've never really been suitable for this job, are becoming harder to source, and...
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
If you look at "Fig 12. On-Resistance vs. Gate Voltage" you will see why IRLB8743PBF is not suitable for 3.3V use. It needs a 5V gate driver as STB asserts. That also solves the gate capacitance...
View ArticleRe: Motor vibration and faulty microstepping - Help needed!
Well, what does a voltage meter say? You can actually measure those pins as soon as 5V is applied. Comparing to the other ones is a good idea. And ... there's always a chance you Pololu is simply at...
View ArticleRe: TB6560 driver board
Hi. Very nice TB board. I'm using same drivers for my Printrboard and Gen 7 TM. Wondering how critical the caps on 12 V and 5 V line are for TB and how sensible TB is to noises. I have some crazy...
View ArticleRe: tb6560 driver issues
Very interesting topic about TB6560. Do you think this chip is now obsolete for RepRap?
View ArticleRe: TB6560 driver board
Do you mean the motors make audible noise ? If this is the problem, what is the value of Cosc on your circuit ? BTW, I updated the schematic and PCB files, removing the 8 useless diodes (oops) and...
View ArticleRe: Motor vibration and faulty microstepping - Help needed!
Thanks for helping me out here Traumflug. What pins are you thinking about when you say I can measure across them as soon as the 5V is applied. The jumper pins for enabling microstepping? Also do you...
View ArticleRe: Motor vibration and faulty microstepping - Help needed!
Those settings determine whether a motor is energized while idle. Its common to shut down Z motor while not moving Z to save power, since a screw driven Z cannot be reverse driven by the weight of the...
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
Fair call nophead. That said, we could use a 5V gate drive circuit (there is 5V available off the Arduino Due header), rather than using 12V as STB suggested. IMO using 12V doesn't really buy us that...
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
12V into a logic drive MOSFET doesn't give you much but STBs point was you can use a non-logic drive MOSFET. They usually state RDSon at 10V so again suitable for 12V drive that is 10% low plus some...
View Articlenew too electronics
is there any guides out there for using your multimeter testing voltages and and other associated to make sure everything setup correctly, I am new to electronics and i know how important it is to...
View ArticleHeted bed not integrated into Ramps?
Hey everyone, I am wondering if anyone uses a heated bed for ABS (up to around say 110 degrees) for their printer? I ask because I am just having so many problems trying to heat a bigger bed with 12V,...
View ArticleRe: Heted bed not integrated into Ramps?
QuoteI am wondering if there is anything I can buy/build that would let me say plug into a 110V outlet that will allow me to control the temperature like Ramps does. Possible, sure. Get a heating mat...
View ArticleRe: Heted bed not integrated into Ramps?
Traumflug Wrote: ------------------------------------------------------- > I am wondering if there is anything I can > buy/build that would let me say plug into a 110V > outlet that will...
View ArticleRe: Heted bed not integrated into Ramps?
A solid state relay has a low voltage input and high voltage o/p like this... [dx.com]
View ArticleRe: hall effect sensors as cheap and accurate limit switches?
Hi. I´m new and i want to make the rostock delta printer. I have dudes about wiring of efect hall sensors in ramps 1.4. is there anyone who can help me? Thanks.
View ArticleHelp! overheated pad (soldering)
Gen 7.4.1 I went back to reflow a cold joint and I've ended up with an island that won't take solder! [attachment 14662 Board.jpg] I've tried cleaning it, flooding the whole area with solder and...
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