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http://reprap.org/wiki/Smartrap_mini A new printer near first release, still in development ... Its main goals are ease/speed of assembly, low cost and modularity (being an easy basement for new designs).
Re: Is there a way to break STL in individual parts' files? - 8 years ago
Umm, my idea didn't work... I'm with Meshmixer atm, I can separate the big STL in Shells (a single command => 27 shells created), then I have the option to "make solid" one by one but am stuck there... How do I select each solid and export it to STL? ... this is more difficult than it needs to beby realthor - Slic3r
Re: Is there a way to break STL in individual parts' files? - 8 years ago
That sounds great, I have actually tried but it's a lot of work, needs to be done easier. I'll explain. I have about 30 unique parts that are either simple nests or double/triple nests. DSM exports eash simple nest as a STL file, so if I have a parent made of 5 nested components I'd get 5 STL for those. They are named 1,2,3... I don't know what they are, unless I open them and save them after Iby realthor - Slic3r
Re: What is your experience with dual hotends? Are they worth the trouble? - 8 years ago
Not at home for a few months... I would ask anyway even if I were home for experienced people's opinions are usually useful along the way.. PS: don't assume people have the same resources or garage or situation as you have. You know what's said about assumption .by realthor - General
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
Will do that as time and life and location permits . But the discussion sidestepped from the original question which was about each axis endstops location and the endstops people use. Are you guys using something else than mechanical endstops?by realthor - CoreXY Machines
Re: Is there a way to break STL in individual parts' files? - 8 years ago
It would be the same as saving each to STL from CAD. I need an automated method of doing it. DesignSpark Mechanical can do it but it looks down any nested CAD components and exports each single bit into its own STL, whereas I only need the top parents to be exported as STL. In this regard a script that reads an STL, and saves as STL each object at least 1mm apart from another mesh and saves thoseby realthor - Slic3r
Re: Is there a way to break STL in individual parts' files? - 8 years ago
Quotedmould If they are nested, how can the slicer know which parts you want to be separated? So long as the position of the parts does not change by much when you modify a part, you would only need to write a suitable OpenScad script once. Dave They are nested in CAD not STL. STL is clean and parts are separate. Probably an OpenSCAD script can do that. It would be awesome.... but I don't knowby realthor - Slic3r
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
Well, I don't understand all you say so I can't imagine just by reading. And from the pictures I couldn't tell. About my probe: I have printed it but haven't tested it on a printer. It's pretty simple actually and providing the nozzle is clean it should be repeatable. I haven't used it as I haven't yet designed a proper snapping mechanism (a way for the printhead to take it from a parked positioby realthor - CoreXY Machines
Re: Is there a way to break STL in individual parts' files? - 8 years ago
I am using DesignSpark Mechanical and I have exported all parts to STLs but it is tedious task and if I work on the design and modify a few parts then I have to export them right away otherwise I forget which ones I have slightly altered. If I could just export all to a single STL and break that STL apart then I'd always have the latest individual versions in STL format. Actually DSM has a breakby realthor - Slic3r
Re: Is there a way to break STL in individual parts' files? - 8 years ago
That is very much work for a STL with 40-50 individual parts that are easily recognized by slicers. It's a pity such an option is not there...by realthor - Slic3r
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
QuoteMKSA As for a removable probe, the best, would be try to make one. It is a good occasion to learn what a micron really is, how to design, make accurate mechanical parts, etc.... Of course, the conclusion would be, not useful here but the skills gained are worth it. I have designed one that doesn't have the issues you are telling about. I've been posted about it here: It's a derivative ofby realthor - CoreXY Machines
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
Hmm, I think I missed something because all I saw in your link is the mention of it and two pictures where I couldn't get a clear idea of the way you modified the microswitch. Any intention of making a tutorial? Is the springiness of the assembly its differentiating feature compared to a direct-contact nozzle-bed? As I really see that one as a really good alternative, minus the fact that it's aby realthor - CoreXY Machines
Is there a way to break STL in individual parts' files? - 8 years ago
Hi guys, I am exporting from CAD a bunch of parts in a single STL. I can open that STL and ungroup/split etc but I can't seem to be able to divide the job among several files if I only want a part at a time for printing. I'm thinking about some sort of export that has an option to "Export each object to a STL". Does something like that exist? Slic3r or otherwise. Thanks.by realthor - Slic3r
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
QuoteMKSA And the simplest, accurate, no messing around, light, immune to normal t° change, magnetic field ... is to have a leaf switch NC. Same principle as probe used on machine tools. As they are quite expensive, I made one using berylium copper gold plated Berg connectors. Just for my Z axis indeed.. ... besides the nozzle2bed-direct-contact? .That would fall under the NO category though.by realthor - CoreXY Machines
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
Quotedc42 Even if you don't need to do bed levelling because your bed is flat and the gantry rigid enough not to sag by more than 0.05mm as the head moves, a Z probe is still useful to establish the Z=0 point just before starting the print. Making the probe removable adds more complication, and IMO is pointless when the on-carriage probe weighs only 2g. There is even a weightless probe, if youby realthor - CoreXY Machines
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
Quotethe_digital_dentist If you really want to keep the extruder carriage light, build the machine so the bed stays level. Then you won't need a leveling probe, the wiring, the firmware options, or the debugging time you are going to have to spend on getting it to work. I think speed is grossly over-rated. I have seen a lot of videos of machines printing really fast, but I have never seen a reby realthor - CoreXY Machines
Re: X,Y and Z "endstop" triggering by pushing wire to activate a single lever-based probe (renishaw or otherwise) - 8 years ago
QuoteMKSA Quoterealthor Use a single "sensor/probe" and a wire loop system to be used as a medium to trigger the sensor/probe, with no moving components. So what are the advantage compared to 2, eventually 4 microswitches ???? (a renishaw is just that, 3 switches, well made and very expensive). Note that for my Z axis, I indeed modified the microswitch which I do not consider fit for this positiby realthor - Let's design something! (I've got an idea ...)
Re: How is SmartrapCore XL300 bed connected to the linear bearings? - 8 years ago
Sorry to hear about your problems... Keep improving it and show us prints, pictures, videos ...by realthor - Smart_Rap
Re: X,Y and Z "endstop" triggering by pushing wire to activate a single lever-based probe (renishaw or otherwise) - 8 years ago
Use a single "sensor/probe" and a wire loop system to be used as a medium to trigger the sensor/probe, with no moving components.by realthor - Let's design something! (I've got an idea ...)
Re: X,Y and Z "endstop" triggering by pushing wire to activate a single lever-based probe (renishaw or otherwise) - 8 years ago
QuoteMKSA I have seen similar set up but Instead of the renishaw it was a claymore mine Haha, let's blast the enemy (X Carriage) for not complying with our wishes (speed, weight, etc) There are several possible issues with this approach I'll start so maybe that way the discussion can get started: 1) spectra/steel wire ... even if properly tensioned might not react fast enough 2) the force neeby realthor - Let's design something! (I've got an idea ...)
Re: Timing belt Vs fishing line - 8 years ago
Quoteleadinglights I just worked out the geometric error resulting from a "walk" of 6mm total for a simple Cartesian case - Prusa Mendel type printer. The maximum error that I got was about ±22 microns - just under 0.001" I would show my working out but would probably be taken to task for perpetrating a "long dissertation, thesis, monograph, opus, oeuvre, study, critique" with the added offenceby realthor - General
X,Y and Z "endstop" triggering by pushing wire to activate a single lever-based probe (renishaw or otherwise) - 8 years ago
I couldn't explain better in a few words the crazy idea that stays on my mind for a while. I was thinking how can I activate a single sensor/microswitch/probe at both ends of each carriage (Xmin, Xmax, Ymin, Ymax, Zmin, Zmax) and how to differentiate (in software) which side triggered. I only have a napkin-sketch so far because I didn't waste too much time on it since I imagine there could be aby realthor - Let's design something! (I've got an idea ...)
Re: What is your experience with dual hotends? Are they worth the trouble? - 8 years ago
QuoteJamesK Just based on the practical difficulty of tightening a lock nut sufficiently without moving the throat. Like you say, once tightened it should be fine, but it might be quite hard to get it in the right place. The vertical alignment of the nozzles really is quite finicky. A lot depends on how often you expect to change hotends. If the answer is almost never then you could probably makeby realthor - General
Re: What is your experience with dual hotends? Are they worth the trouble? - 8 years ago
QuoteJamesK I don't think I'd want to try and use a lock nut to set the final height of a threaded throat. Do you expect that one will not be able to fasten the nut without moving the threaded barrel just enough to invalidate the level of the 2 nozzles? Do you expect vibrations to affect such fastened jam nut? Is there any other reason? I fail to see any difference with regards to set screwsby realthor - General
Re: Timing belt Vs fishing line - 8 years ago
Quotemurrayd The spool is winding onto the screw thread as the line is winding. The spool is walking, the line is stationary, the thread pitch is the thickness of the line. Video to follow. That's correct, its either the line walking or the support spool has to do translation movement in the other direction to keep with the walking of the line. I'm curious to see the video though.by realthor - General
Re: Timing belt Vs fishing line - 8 years ago
If the cable winds on whatever (and it unwinds from the other end) then it walks. There is no such thing as non-walking on a fixed shaft. Not in my experience and logic. On the Lander Scara that I have worked on some time ago i solved the walking by letting the thread walk on both sides (see my sig if courious). In my logic, if you let the motor turn in one direction only with your rig, the cabby realthor - General
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
Unless there will be a competing (in price) option most people will go the sub 10moneys route of a heavier induction probe. And because I am also interested in the technology to change toolheads, having it as a detachable toolhead could be an improvement for many printers out there.by realthor - CoreXY Machines
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
Quotedc42 In a Cartesian or CoreXY printer, you don't need the X and Y endstop switches to be highly repeatable - unless you plan to implement pause/power down/power up/restart functionality, or something similar that means you need to home the X and Y axes in the middle of a print. So it really doesn't matter what sort of switch you use. The Z axis is a different matter. A head-mounted Z probeby realthor - CoreXY Machines
Re: What is your experience with dual hotends? Are they worth the trouble? - 8 years ago
QuoteKoko76 Quoterealthor QuoteKoko76 Not super useful though unless you have a wire cutter. Sorry to be thick-headed but what part is the one you are cutting the flap into? The idea is pretty neat but the flap should also not be alu i suppose otherwise the set screw might eat into it. These are things I have actually done, I don't need to suppose or speculate. What I described is a method in gby realthor - General
Re: What is your experience with dual hotends? Are they worth the trouble? - 8 years ago
QuoteKoko76 Not super useful though unless you have a wire cutter. Sorry to be thick-headed but what part is the one you are cutting the flap into? The idea is pretty neat but the flap should also not be alu i suppose otherwise the set screw might eat into it.by realthor - General
Re: What's the best placement of EndStops in a CoreXY and are mechanical ones still used by you guys? - 8 years ago
The question is about precision and repeatability. Following the same train of thought I am thinking about an analog-ish way to achieve the same. A similar example would have a wire that the cat pushes when trying to get out the door and that wire pulls a switch. It would be a high rigidity wire (maybe spectra) that goes around the XY stage and which is pushed by both the Y carriages when they geby realthor - CoreXY Machines