Re: can I use larger steppers on the RAMPs 1.4?
I'm driving 2 of these [www.shadowram.ca] with the RAMPS 1.4 and A4988 Pololu driver, with the pots at about 30%. No issues, But I have heat-sinks on them, and a fan blowing on them. Also my setup...
View ArticleRe: Why a Type K thermocouple?
Thermocouple ICs have more than calibrated amplifier, among other things they got some absolute temperature reference built-in. Some kind of temperature sensor to which readings are compared and...
View ArticleDigipot board for RAMPS + DRV8825 : Looking for helping eyes
Greetings all. I posted this in the RAMPS forum the other day, but perhaps that was the wrong place. I got the idea in my head that I'd like to use a digipot the way that RAMBo does to control the...
View ArticleBasics about switching loads (hotend, heatbed) with MOSFETs
Hi ! Very often users have problems with the MOSFETs used for switching heatbed and hotends. I wrote an article to understand the basics. Basics about switching loads with MOSFETs
View ArticleRe: multiple fans
I have paralleled up 4 fans on the printer I just finished and connected them to the fan output on the control board. Two fans are on the hot end and the other two are on the X and Y axis motors to...
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
Hey bobc, On the topic of protection, it would be worthwhile adding diodes on the FET outputs too, such as described in the following thread: [forums.reprap.org]
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
Hi ! Are you still looking for helping hands? I developed the easy electronics and the graphics LCD shield for Sanguino & Melzi. I have a bit experience in designing analog & digital PCBs. I...
View ArticleMotor vibration and faulty microstepping - Help needed!
Hi guys, Here's a long message describing my issues with my first 3D-printer built. Sincerly hope you can provide me with some help! I have a problem with my newly built and first Reprap Prusa i3. Its...
View ArticleRe: Motor vibration and faulty microstepping - Help needed!
Did you also rule out cooling, firmware settings and the software you are using? I have also heard there can be a problem with the data being fed from USB bandwidth. I had the same problem once and it...
View ArticleRe: Motor vibration and faulty microstepping - Help needed!
I'm very new to the whole RepRap so troubleshooting the software is somewhat difficult, but I wouldn't expect that stock Marlin firmware is set to enable microstepping on Z-axis but not XY and to my...
View ArticleRe: Motor vibration and faulty microstepping - Help needed!
Quoteat the accerlation and feedrates needed for printing (3000mm/sec^2 and 500 mm/sec, respective) There is no "need" for 500 mm/s. In fact, I'm not aware of an extruder which can achieve such speeds...
View ArticleRe: Basics about switching loads (hotend, heatbed) with MOSFETs
Excellent article, STB!
View ArticleRe: Motor vibration and faulty microstepping - Help needed!
I have made a temp. fix by changing the X axis to E1 and swapping Y and Z axis. The lack of microstepping seems less severe on the Z axis as this axis is threaded on an M5 rod and still require 160...
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
nophead Wrote: ------------------------------------------------------- > This is maybe what I would do. > > [forums.reprap.org] > lename=clamp.jpg > > I would look to see if I could...
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
All inputs have some static leakage current, even if is nA.. It should be on the datasheet but others have reported it isn't.
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
It's in the datasheet SAM3X, SAM3A Series page 1420. Atmel specs. +/- 500nA which gives an error of approx 10mV with 22k series resistor.
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
Some thoughts on MOSFET switching. Gate drivers for the MOSFETS are mandatory, driving the gate with 3.3V results in bad Rds_on behaviour. You should think about driving the gates with 12V. MOSFETS in...
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
10mV will give about 5C error at 250C.
View ArticleRe: Reprap Arduino Due Shield project - looking for helping eyes.
Catching up... Cefiar Wrote: ------------------------------------------------------- > nop: Actually you seem to be right. They are the > same way, in which case bobc's wouldn't actually >...
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