http://www.openscad.org/news.html#20150310 OpenSCAD 2015.03 has just been released! This release adds a number of features which has been in development for some time. Most prominent are text(), offset() and list comprehension functionality, as well as a better editor and other GUI improvements implemented during last year’s Google Summer of Code. The source code, as well as binaries for Mac Oby QuackingPlums - OpenSCAD
Teardrops are also in MCAD: https://github.com/elmom/MCAD/blob/master/teardrop.scadby QuackingPlums - OpenSCAD
Isn't that what I did Bob? ;-) I like the gridlines - is that a feature in one of the newer dev branches?by QuackingPlums - OpenSCAD
Similarly, if you want to define that shape that you'd use to cut a round hole with bevelled edges out of another solid, then you can use the same technique I described for your cube but using toroids to chamfer the edges: $fn = 100; Rounded_hole(100, 30, 5); module Rounded_hole(depth, radius, bevel_radius) { difference() { cylinder(h=depth, r=radius+bevel_radius, center=true); //elongby QuackingPlums - OpenSCAD
Do you mean rounding the lip, or the entire end of the cylinder like an ibuprofen capsule? If the former, then you have to think about the basic shapes that you are able to make and how you can stitch them together. A hollow tube with rounded ends is essentially two thin donuts bridged by a hollow tube. That description should make it obvious but here's an example: $fn=100; // reduce this forby QuackingPlums - OpenSCAD
It's called an Insulation Displacement Connector, Ian. They should probably shorten it to... I don't know... "IDC" maybe? ;-) Available here: http://www.rapidonline.com/Cables-Connectors/IDC-39-D-39-Connectors-63714by QuackingPlums - Mendel90
You can use hull() between the two cylinders but you're probably not saving that much code-wise. Here's an example using a canonical cube: Rounded_aperture(size=50, radius=5); module Rounded_aperture(size, radius) { ff = 0.05; // CSG fudge factor difference() { cube(size=size+ff, center=true); for (i = [0:3]) rotate([0, 0, i*90]) hull() { translate() rotate([90, 0, 0]by QuackingPlums - OpenSCAD
Quite a few of us do I think, though we use a variety of different methods. I wire mine up to my Panelolu2 break-out board, which exposes FET switched headers for two additional devices - I use one for my bed fan and the other for 12V gantry LEDs. This is not the only way, but was convenient for me because I already had my Panelolu2. There's a photo of mine on Thingiverse with my fan cowl for diby QuackingPlums - Mendel90
Quoteneildarlow The only thoughts I have are that the hot-end fan will push the fumes down towards the heated bed and they will circulate everywhere from there. I think it might be an idea to vent the case at the centre-rear and let clean air in at the top of the case. A low airflow should prevent too much breeze effect and the incoming cool air will mix with any rising warmer air. I am not sureby QuackingPlums - Mendel90
Thanks Chris. Acetone didn't previously appear in the search results, which I assumed was a pretty flimsy precaution against people setting up meth labs (or whatever nefarious uses there are for acetone). It could be found however by going via "Educational supplies", then "Chemicals", then "A" and look down the list. Last time I ordered a 1l bottle they sent me 2.5l by mistake so now I have wayby QuackingPlums - Mendel90
What cloth do you use Chris? I've been buying my acetone from Rapid, where I thought you got yours from. Mine doesn't come with any lint-free cloth.by QuackingPlums - Mendel90
The Robox produces some amazing quality prints out of the box. The print quality of the beta machines was a bit hit and miss (I think the needle valves didn't work as intended and the firmware wasn't making use of the feedback loop) but it incorporates a lot of nice technology that if nothing else, makes 3D printing something than anyone could do without first having to take a degree in thermoplaby QuackingPlums - Mendel90
In the examples you gave from the Mendel90 parts, the membranes are intentional and are a result of designing within the limitations 3D printing - many people don't realise that 3D printing isn't yet at the stage where we can grab a 3D mesh from anywhere and expect to print it without modification or tweaking. Until dissolvable support becomes a standard feature, we have to think about how our laby QuackingPlums - Mendel90
Joined. Did you have a Mendel90 specific purpose for it or is it just another social medium for sharing stuff?by QuackingPlums - Mendel90
I have modified my firmware to add menu options for pre-heating to various temperatures, extrusion/retraction, etc. but in doing so have created an extra merge step for myself whenever I am upgrading my firmware. Unless you are a programmer and/or don't mind doing this every time you want to upgrade (not to mention having confidence in your abilities to do so) then I would advise against it andby QuackingPlums - Mendel90
Use any IDE you like and set it to auto-reload on change. The new release (dev snapshots available from the download page) will have a better editor but if you prefer Notepad++ then go ahead and use that. No point spending energy solving a solved problem. ;-)by QuackingPlums - OpenSCAD
If you're within the van delivery area (i.e. London) then is a good source of low-volume fasteners (they sell individually if you want). Once you add postage to the rest of the UK however then £45 from your eBay seller may not be such a bad deal.by QuackingPlums - Mendel90
I have loads of those strip LEDs as well as several variations of those buck/boost converters (when you buy them from a certain shop they come on one long strip that you snap off as you use them!). I never considered using them to drop my supply voltage to 11.5 to stop the flickering.by QuackingPlums - Mendel90
1: Check this thread for a discussion about constraining the z threaded rods. Also this thread for my approach during the build that reduces wobble in the first place. 2: Dial guage mount - not essential but handy to have for calibration (I believe it is in the manual). It was the second thing I printed after my android. 3 & 5: I didn't find these tensioners necessary but YMMV. I haven't haby QuackingPlums - Mendel90
Yeah, my problem is that my YouTube, GMail, GoogleApps, Docs, Drive, Chrome, etc accounts were all created before the consolidation of the Google SSO architecture so now I have multiple accounts to everything, with multiple notifications and total confusion over which things I've already read/been notified about. Every time I access a Google service I have to remember which particular account I uby QuackingPlums - Mendel90
I have yet to get involved in G+, mainly because the multiple accounts I previously had with various services have now been subsumed into the Google collective and made my life much more complicated. I really don't need another social network but if it's easy and unobtrusive to use (and someone is willing to describe it to me) then I'll certainly investigate. Whether I continue to use it will depby QuackingPlums - Mendel90
QuotenopheadYes you need to make a T junction near to the Melzi terminal to common the grounds but all the bed current will still flow through the Melzi ground terminal. With the bed current increased from about 10A to 17A when it is cold it may exceed the rating of the terminal. Possibly you can fit a bigger one. In either case it needs to be a very good low resistance connection. It may not heby QuackingPlums - Mendel90
Ah, I've misunderstood how the 24V bed works then. I was assuming that I need a bed to be capable of running at 24V in order to get away with increasing the bed supply voltage. It sounds like the 24V bed just reduces the need for a high supply current without actually increasing the bed temperature. As the Melzi happily works with the 12V/10A draw of the current bed it looks like there is no beneby QuackingPlums - Mendel90
I’ve been thinking about ways to increase the heating capacity of my bed and have bought one of the MK2B dual power 12V/24V PCB heatbeds from Hobby Components to try out. I am thinking I can use the 12V bed feed from my Melzi to switch a 24V PSU via a relay instead of powering the bed directly. Will the Melzi still be able to regulate the bed temps with this setup? Obviously I'd recalibrate the Pby QuackingPlums - Mendel90
Perfect! Thanks Neil!by QuackingPlums - Mendel90
Quoteneildarlow I have added a little cosmetic fix, which nobody will notice, that ensures the Panelolu2 status line is cleared of old content when new content is output. Oo, where did you make this fix? It has been on my "get round to it" list for a while but so far has been relatively low priority.by QuackingPlums - Mendel90
This doesn't sound like a nophead Mendel90 kit by your description, (which is fine I guess, it is open source after all) but the parts shouldn't be too close if they were printed from the well-documented plans. Have you got a picture? The fan on the Mendel90 is for cooling the job, not the hot end. The PEEK based J-Head doesn't need active cooling, unlike the metal-finned alternatives - I thinkby QuackingPlums - Mendel90
I had a similar problem, described here. Further down that discussion you can see that Chris supplied a design for some additional clamps that will delay the total failure of the x-end until you have managed to print replacements. I found actually that once the temporary clamp is fitted, you can loosen off the broken one and use some high concentration ABS slurry to weld the split clamp back togby QuackingPlums - Mendel90
You need a duck! I saw that loop when I looked at it last night - I couldn't see in your photo where you needed 110 holes in a line but got distracted whilst trying to break it down. I would also argue that you're never going to see the benefit of a 120 segment curve on a reprap for the size of object you're making. Even 30 segments is overkill for a 4mm machine hole. For screw holes it wouldby QuackingPlums - OpenSCAD