That's not a problem, because the only time it expands, is when you want to stop the flow. Also, when you restart, you're compressing again, which heats it up.by M.qrius - General
If you made an airtight sphere out of ABS, in a perfect vacuum, with an edge thickness of 0.5mm, you'd have to have a radius of roughly 13 meters for it to float in mid-air. Just letting you know.by M.qrius - General
The details can be found here: The total volume is: 1110 cm3 (67.7 inches3) The print speed: 15.0 cm3/hour (solid) (0.92 inch3/hour (solid)) The solid means when printed with 100% infill, and the print speed is only valid if you use the prescribed parts.by M.qrius - Altes Forum
Those connectors look so cool Do you have a picture of real ones?by M.qrius - Plastic Extruder Working Group
He made the same post two times. He can't delete the post, but he can edit it to say "deleted".by M.qrius - General
It might be sufficient for the positioning system, but probably not for the extruding. Also, if you use gears, you might get a really low maximum movement speed..by M.qrius - Mechanics
Well, we're going to use the same components (in DIP version) as the PCB, but we're doing the layout ourselves, yes. I haven't made one yet, sorry It also allows you to strip out some things you may not use if you want to go cheap, such as the quadrature encoder if you're using a stepper motor, the I2C headers, the servo headers, and you could also replace the H-bridges with another stepper conby M.qrius - Wanted
Me and my dorm mate are currently building a repstrap. We need some ABS to use, but the one on reprapsource is out of stock. Is there anyone who lives near Enschede (That's near Gronau) who would want to sell me some ABS? I was thinking half a kilo, or a kilo or something...by M.qrius - Altes Forum
My dorm mate and I are going to make it on DIP board, so that might be an option for you too. You need to get an electronics supplier which has the chip in DIP version, but they seem to be no more difficult to find then the SMT version, at least here in the Netherlands.by M.qrius - Wanted
GeertB Wrote: ------------------------------------------------------- > No, you don't want short bars, but continuous > filament ("lasdraad"). It seems they're just not > listing it on their website, but they'll likely > sell it, given that they do sell a > "lasdraadafrolinrichting". I figured I shouldn't get these (20 cm bars): But these seem a lot longer, judging from the pictuby M.qrius - General
This site sells ABS bars in the Netherlands, but they're more yellow than usually, and they call them welding rods. Is this still suitable for extruding?by M.qrius - General
Heh, perhaps Marcus will be selling them soon? You can't halve it lengthwise, that doesn't solve the problem. I think the minimum number of parts would be 3: halve the dome horizontally at the 45 degree angle, then halve the top half lengthwise, and build those on their sides...by M.qrius - Let's design something! (I've got an idea ...)
For a more sensible idea, consider this (attachment) You'd get a bit of a flat top on your helmet, but not much. Also, the inside is a dome.by M.qrius - Let's design something! (I've got an idea ...)
MarcusWolschon Wrote: ------------------------------------------------------- > M.qrius Wrote: > -------------------------------------------------- > ----- > > Does the sphere need to be perfect? > > As I said. "helmet". A human head has > to fit in it. Right, that's going to be hard > What condition does it fulfill? > Take for example the whistle. Many peoplby M.qrius - Let's design something! (I've got an idea ...)
Does the sphere need to be perfect? You could do something that is a dome on the outside, and close to a dome on the inside. The popular whistle shows that overhangs can be possible in some conditions. Filling up the dome fulfills (at least one of) these conditions. It depends on your extruder and the size of the dome if this is going to work, and it depends on your application if this is acceptby M.qrius - Let's design something! (I've got an idea ...)
Please put a divider between someone's message and his sig. I'm getting really sick of reading a message, and then reading things like "Necessity hopefully becomes the absentee parent of successfully invented children." "Bodge it" "If we open a quarrel between the past and the present, we shall find we have lost the future." Only to find halfway through that I'm reading someone's signature... Soby M.qrius - Administration, Announcements, Policy
I've never found any US supplier supplying anything overseas with reasonable shipping...by M.qrius - General
> > I have no experience of the Kapton version but > it does seem that one down side is that you need > PID control rather than bang-bang with it. > > I think I have missed the part regarding the need > for PID control if using Kapton tape can you point > me to that part pls... I didn't see that either, but I think he's referring to the low temperature limit of kapton: 3by M.qrius - General
You can figure it out if you have an ohm meter/multimeter. Just connect wires to the ohm meter until you find a wire that is connected to all of them.by M.qrius - General
We have decided to use a kapton tape based design. It seems everyone who tries it is positive about it, and I haven't seen any reports of failure. We'll also be using Isotan wire instead of nichrome, simply because only the former is available in coated (enamelled). Using kapton tape probably means we'll be using a retainer washer concept, like the makerbot. This seems like a sensible design: Iby M.qrius - General
How about using simple sand as support material? When the software detects support material is needed on the next layer, it adds sand to those places that are going to need support. It keeps adding sand until the sand cone is high enough (This would need a detector that triggers at that instant, for example a small photodetector at the same height next to the nozzle, which would get covered withby M.qrius - General