Re: Problems with Sensor
Oh really... I must have missunderstond the difference between NPN and PNP! I have a NPN sensor to but I never tried to use it since I thought that I had ordered the wrong type :D I'll try and connect...
View ArticleProblem with my sanguinololu..
Hello, so i decided to build back my 3d printer and i am facing a problem with my sanguino (rev 1.3a if i'm not mistaken) The j-head doesn't receive any power. The board looks in good state, nothing...
View ArticleRe: Problem with my sanguinololu..
The pins HEATER_0_PIN=13 and HEATER_BED_PIN=12 are defined in pins_SANGUINOLOLU_11.h if you are using Marlin 1.0.2 or newer (or in pins.h for older versions, search for MOTHERBOARD == 62). There you...
View ArticleRe: Problem with my sanguinololu..
So after some testing, the pin n°19 is always at -0,7volts which is not nice... Do i have to replace the 40 pins chip? Looks strange to me, how a chip can work for everything else but not that? Also,...
View ArticleRe: Problem with my sanguinololu..
Quoteglub0x So after some testing, the pin n°19 is always at -0,7volts which is not nice... Do i have to replace the 40 pins chip? Very strange that you get a negative voltage... Have you measured...
View ArticleRe: Problem with my sanguinololu..
After double check the voltage on pin 19 is +0,74 no matter what ... I guess i just didn't pay attention and reverse black and red on the voltmeter Also now the bed temp sensor doesn't work. the...
View ArticleRe: Problem with my sanguinololu..
At least it's good to know that there was no negative voltage :) As for the extra sensor pin, you could use one of the five analog input pins A0-A4 on the 14-pin extension header. But you have to add...
View ArticleShorted out pololu?
So I was trying to dial in my pololus this morning, and I managed to touch the screwdriver to something I shouldn't have. There were sparks. Now my Y axis motor will only vibrate loudly when it should...
View ArticleRe: Shorted out pololu?
Order some ceramic screwdrivers too, so you don’t do it again.
View ArticleProblems after swapping drivers
Last week I managed to fry one of my pololus (y axis) by shorting it out with a screwdriver. I ordered a generic stepstick driver to replace it. After installing it today and adjusting the current I...
View ArticleRe: Problems after swapping drivers
Could it be that your new stepstick uses a different chip (e.g. DRV8825 instead of A4988) which use different jumper setting for microstepping? So e.g. if the new stepstip is DRV8825 and is set to...
View ArticleRe: Problems after swapping drivers
That is exactly the issue! The board came with A4988 chips, but the new one is a DRV8825. After reading some more last night, I realized I need to switch some of the jumpers to make it work. Thanks so...
View ArticleRe: Problem with my sanguinololu..
Ok so thanks to your advice i build the seven switch which works fine. On the same board i build the temperature sensor and that work as well. BUT i got some VERY strange behaviour that i cannot...
View ArticleRe: Problem with my sanguinololu..
If you connect the heatbed directly to the Sanguinololu, the MOSFET also gets hot. But it's better not to do that, since the traces on the PCB are quite weak, so you risk burning them at >10A (see...
View ArticleRe: Problem with my sanguinololu..
There is something i would like to clarify. The D12 pwm should be plugged to to the gate of the seven switch. I put HEATER_BED_PIN 4. But for the temp sensor TEMP_BED_PIN 4 (A 4) Is that normal ?
View ArticleRe: Problem with my sanguinololu..
Yes, the pin label D12 PWM on the Sanguinololu is wrong, it should be D4. And using (D)4 for a PWM output pin and (A)4 (=D28) for an analog input pin sounds indeed strange, but it should work.
View ArticleRe: Problem with my sanguinololu..
Ok thanks to your help i solved all my problems everything works. I now have a much better understanding of this sanguino! The bug of the heated bed sensor that didn't work regardless of the fact that...
View ArticleRe: Problem with my sanguinololu..
I also remember that the first batch of IRLB8743 I bought had a much higher ON impedance than it should be according to the specs - so they got much too hot. The second batch was ok and the MOSFETs...
View ArticleRe: Problem with my sanguinololu..
70mv not nice :(.... i will try to use this mosfet for fan control, will another MOSFET work with D11, it's not rated as PWM ? Another option for me is to use 2 Mosfet in parallel sounds weird but why...
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