Re: First Motherboard
Aha NoobMan, so basically, if I follow your reasoning, the problems I had with my crispy MOSFETs could have been avoided by simply editing the line in my marlin that enables PID for the bed?: // Bed...
View ArticleRe: First Motherboard
No, no PID at all for bed. Reprap PID is not actually "industrial" kind of pid at all, our reprap pid is actually implemented as calculation for pwm on-off times. The whole point is to avoid pwm,...
View ArticleRe: First Motherboard
I dont use marlin and i think took a long time since i checked it out, just now i looked at marlin from github page in configuration.h, and default configuration seems ok for as far as i can tell: //...
View ArticleRe: First Motherboard
QuoteNoobMan // If your bed has low resistance e.g. .6 ohm and throws the fuse you can duty cycle it to reduce the // average current. The value should be an integer and the heat bed will be turned on...
View ArticleRe: First Motherboard
Yes the IRL3808 looks better to me too, mainly because it has half the on-resistance of the other, so when it conducts it dissipates less. First check thingy i would look for Ids versus Vgs graph. So...
View ArticleRe: First Motherboard
Also i think IRL3803 might be kind of better than ~08. Ultimatelly if you want to choose something thats better and smarter than the average fet, you can try IPS1011 from irl. But that is a different...
View ArticleGen7 v1.3.1 Atmega644 Electronics Bootloader Upload
I have a Gen7 v1.3.1 board that I am trying to get working for the first time. I am having trouble uploading the bootloader. I am using a Polulu USB AVR Programmer (http://www.pololu.com/product/1300)...
View ArticleRe: Ramps 1.4 Board Question: Shortcircuit - Help PLz!
it's hard to tell from the pic, but that looks like the D10 negative output. If that's the case, then yes - those are the two pads connected by that burned trace so a wire soldered in there would...
View ArticleDIY Power Supply?
I am building a 3D printer as a way to learn more about electronics. Most plans use the 12VDC rails of an ATX power supply. Since I am not in a hurry and would like to learn and apply electronic...
View ArticleRe: DIY Power Supply?
The one thing that an ATX PSU has over the basic design that you're looking at is AC-DC conversion efficiency. Switch mode supplies, such as an ATX supply, can be very efficient (>90%, depends on...
View ArticleRe: DIY Power Supply?
For ac, if you have say mains input, 230v or 115v and want to get an output of say 12vac, then you use a transformer and transformers can be very efficient, like 97-98% which is awesome. And even...
View ArticleRe: DIY Power Supply?
Haha, we posted in same minute - how cool is that :) Good morning btw :)
View ArticleRe: First Motherboard
So, summarizing and making a simple yet effective conclusion: First recommended option for a beginner's first motherboard: RAMPS 1.4 + (x1) IRL3803 MOSFET to have spare for the event of burning that...
View ArticleRe: DIY Power Supply?
Thank you both. Limiting the use of LM338 is clever. I plan on starting with a simple approach and adding complexity over time through multiple revisions. It might be fun to eventually print the...
View ArticleServos to Rambo 1.2 d
Hi everyone How can I connect small RC 5V servo to Rambo 1.2d board? I can't find any detail description of connectors. Can I use motors ext connectors?
View ArticleHelp! Static electricity buildup keeps killing my prints!
Yep, you read that right. Static. Seems that when my printer is connected up to my PC, and the external power supply, any time I go near the thing I get a USB disconnect from the PC due to static....
View Articlecompare 8 bit to 32 bit printer controller
Hi everybody, i kindly ask your opinion about difference from 8 to 32 bit: is it a real improvement? I see i think 90% of the printers are running a 8 bit board with good results: what is the real...
View ArticleRe: Help! Static electricity buildup keeps killing my prints!
I have the same problem with my i2. If I touch just the wrong part of the frame on a cold day, it resets my Sanguinololu. I still haven't done anything to fix it. In electronic design, ESD effects are...
View ArticleRe: Help! Static electricity buildup keeps killing my prints!
Ive actually had that happen once before. I touched one of my motors and zap! Everything disconnected. You could always buy an anti static bracelet or earth ground your stuff. When I worked on...
View ArticleLinear Bipolar Stepper Driver... Looking for input on development
I am in the process of developing a linear bipolar stepper motor driver. It is similar in concept to the Linistepper with the main difference being that it is designed for bipolar stepper motors...
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