Re: RAMPS for Due!
The one thing I can see from the Gerbers is that some of the tracks seem a bit thin around the power area. Also, which project file is the latest version, since there's two in the repo?
View ArticleRe: sanguinololu board running low voltage motors
The voltage rating on stepper motors is effectively the minimum voltage required to make them work. You can use higher voltages than the "rated" voltage through a stepper driver (the higher the...
View ArticleRe: Better heated bed PCB design?
I think the next thing I should pursue is building an enclosure. I expect that it will get hot inside there and I should be able to provide some airflow for the electronics. But with regard to...
View ArticleWiring up PSU
I'm quite new to the forums (but a long time reader), and have decided to post a question I had regarding the electronics for Reprap printer I am currently building. I currently reside in Japan, where...
View ArticleRe: sanguinololu board running low voltage motors
Thanks a million Cefiar. This is exactly the answer I was looking for. Best Regrds Ryan
View ArticleRe: Better heated bed PCB design?
When you enclose a printer, you should place as much of the electrics outside of the enclosed area as possible since most things don't like temps greater the 75C and prefer even lower temps, but the...
View ArticleRe: Better heated bed PCB design?
Yes, I would definitely not want to run electronics over 50C ambient, less if possible. I had no idea just enclosing the printer could get things that hot but now that I think about it, it makes...
View ArticleRe: Wiring up PSU
For AC current going into a switching PSU it shouldn't matter - having ground is more of a safety issue than anything else. Here in the US most houses are wired with hot (live) and common (neutral)...
View ArticleRe: RAMPS for Due!
Ah sorry everyone, versions got a bit out of sync. RAMPS-FD.pro is the correct project, but the board file is RAMPS-FD-v3.brd. I'll try to tidy this up on next revision :) @Cameron, there are 6...
View ArticleRe: Better heated bed PCB design?
Found the "essential reading" links for this topic on the wiki: Heated bed general discussion and applications Traumflug's page on theory behind heated bed design, with formulae The discussion on...
View ArticleRe: Sanguish development
I've got one on order. The SDSL seems to be harder to get a hold of though so I might look at SDRamps too and see if I can get both to work.
View ArticleRe: Wiring up PSU
Thanks for the reply; I figured that it was really only a safety issue (I've had some experience with wiring mains line in Canada, but there was always a ground; I've never had to wire mains in Japan...
View ArticleRe: RAMPS for Due!
Looks really nice Bob! Just to make sure I understand the purpose of the 74LS08, does the /ESTOP then let you kill all the motors at once? And is P302 a pushbutton that does the same thing?
View ArticleRe: RAMPS for Due!
From looking at the schematic, the ESTOP is a signal TO the Due/Mega so that it knows the emergency stop button has been pushed. The P302 connector is for connecting what appears to be a Normally...
View ArticleRe: RAMPS for Due!
Heh, you guys are quick! The ESTOP feature was a last minute addition I couldn't resist trying, but I did goof it up. Logic chips are quite cheap, and I quite like the idea of a hardware stop. With a...
View ArticleRe: Wiring up PSU
Simple test is to use a multimeter and measure against ground (a metallic waterpipe ideally but any conducting floor should give you at least a partial voltage reading). The neutral side should give...
View ArticleRe: Wiring up PSU
I guess testing the outlet is the only way to know for certain; I figured as much. I've always heard that you haven't really worked with electricity until you've been shocked at least once (I hope...
View ArticleRe: Wiring up PSU
Neutral on the left (as you are facing the plug and the grounding pin is on the bottom) is normal here in the US. It's not uncommon (as in my house, built in 1972) for the electrician to install the...
View ArticleRe: Wiring up PSU
Guess I'll have to check the electricity socket then! My apartment isn't quite as old as yours, built in 1977, but still, you never know. I'll give the PSU a shot; hopefully it should be OK since it's...
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