How many Nema17's could an A4988 run?
Say if I were to build multiple delta printers and wanted to run them all at the same time printing the same thing, how many could run off the same electronics? Could I run 4 steppers off the same...
View ArticleRe: How many Nema17's could an A4988 run?
In theory with the right motors / right voltages / right torques, you probably could run a hundred motors on an A4988. They would not run very fast or turn very hard at all. The idea on a Delta...
View ArticleRe: Dual extrusion TB6560 controller
You will need a much wider trace for power ground and for power in. The traces you have are much smaller than they need to be. I'd put a diode in front of the 7805. It can help a bit in odd shutdown...
View ArticleRe: Sanguish development
Got boards for first run of 1.1 RC2 which I'm guessing will be the official release of Sanguish 1.1. I'll build one up and do some testing then put together kits and sell the rest.
View ArticleRe: Sanguish development
Sounds cool. Keep us posted :) What's the kit price looking like?
View ArticleRe: Dual extrusion TB6560 controller
Hmm, nice suggestions. - One thing I should have told you about the board design: it's dual sided, so the power traces for the heated bed are also placed on both sides. According to my calculations, a...
View ArticleRe: Dual extrusion TB6560 controller
You want the traces to be able to handle a near short circuit condition that's under the trip point on your fuses. In the case of the 11A PTC fuses that's roughly 22A. A lot of the calculators out...
View ArticleRe: Dual extrusion TB6560 controller
If you are running 2 ounce copper, I'd take them up to at least 0.2" on both sides for power. Most times it's easier to do this stuff with a copper pour / plane than with a trace. For ground, go for...
View ArticleRe: Sanguish development
Kit price will be the same as version 1.0, $50 plus S&H. Not much changed component wise. Just some changes to routing, placement, etc.
View ArticleRe: Dual extrusion TB6560 controller
Auch! I have 35um copper on the boards (equal to 1oz.), and my trace with is around 48mil on each side. So close to 100mil in total (0.1"), which is close to a 25% of what you advise. Is that right? I...
View ArticleRe: Dual extrusion TB6560 controller
The normal solution is to move the parts around so you can get them together with a "blob" rather than a trace. The issue isn't so much burned traces in normal operation. It's the traces popping off...
View ArticleMendelMax 1.5: No power to Arduino when RAMPS is connected
Hi! I just finished the assembly of a MendelMax 1.5. Here are my troubles... I plug in the power supply (I used a regular cable that is used for a PC with the black [live], white [neutral] and green...
View ArticleRe: MendelMax 1.5: No power to Arduino when RAMPS is connected
If the bed and other motors are going backwards/forwards, the board could have test firmware on it, rather than something like Marlin. Seems like the SD adapter was either on the wrong pins (shorting...
View ArticleRe: Dual extrusion TB6560 controller
But what if I choose to use automotive fuses? Then a current bouncing situation cannot happen due to the fact that the fuse burns through and isn't automatically fixed after the power is off...
View ArticleCrowdfounding Project "SAV MkI 3D printer electronics"
Affordable 3D printer electronics with multiple interfacing possibilities: native USB, uSD, BT (with dongle). Top of the range FETs and direct fan control. This 3D printer board electronics has been...
View ArticleRe: Crowdfounding Project "SAV MkI 3D printer electronics"
A few ore specs about it would be useful. It took me enlarging a photo to confirm that the design uses an Atmel AVR, and not say an ARM based core.
View ArticleRe: Real-time filament caliper sensor
Is there a way that filament could be passed through something like a donut hole but the donut would be filled with water and calculate the volume displace by the filament? Whatever way this goes, the...
View ArticleRe: Crowdfounding Project "SAV MkI 3D printer electronics"
Since a sample board exists, I'd think that having at least a "preliminary - this may change" schematic up would not be asking a lot. Going from the picture only: 1) I hope they get to the higher...
View ArticleRe: Real-time filament caliper sensor
Let's back up a bit. We seem to be talking about 3 mm filament here. Cross section is pi*r^2, so the error (if it's round) would be about 2%. If it's not round, then you have to know just what sort of...
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