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People building or using RepRaps.
Re: New polar concept/design - 10 years ago
Straight lines passing near the table center are going to need very high angular velocity and acceleration. I'm not sure if any firmware support this configuration. Will you be able to modify firmware to make this work? You will have much greater chances of success building an established design, I think.by Dale Dunn - Polar Machines, SCARA, Robot Arms
Re: Innovation Act - *USA* - 11 years ago
Ars Technica watches these things pretty closely, and has nice write-ups.by Dale Dunn - General
Re: Xtra Large 3d printing by ART 3D - 11 years ago
That is indeed a very large printer. I hope your extruder has a huge nozzle. How fast does the print head travel?by Dale Dunn - Developers
Re: 1.75 filament hobbed bolt - 11 years ago
1.5 coming out of a 0.5 nozzle? That's a lot of die swell! You can gear it down to keep from losing steps (or feed it more electricity), but if you're grinding filament you're at the limit of your grip. That enormous die swell suggests that you should try a higher temperature. That will make it easier to push the filament through too. You may need to put more power into the heater to keep up witby Dale Dunn - Developers
Re: Can anyone help
- 11 years ago
That one looks like it was hobbed with a tap.by Dale Dunn - Mechanics
Re: Need hep for Delta print head - 11 years ago
Servos on the print head are a recent development. The hobby servo lowers a switch into position to use as a touch probe to measure where the platform is. The position of the bed is then compensated for by the controller, rather than relying on the user to make sure the bed is level. This is the so-called "auto levelling" bed.by Dale Dunn - Mechanics
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
Quotejreinhardt... I hope you enjoy your long weekend and the turkey. Thanks, I did. Then I had to buy a motorcycle and deal with that, now I have to get ready for the holidays, and then, and then... No further comments on Bolts, I just need to get going.by Dale Dunn - 3D Design tools
Re: Need for speed - 11 years ago
That mini Kossel is flying! I don't stand a chance with my old MG Prusa, but I do have an idea. Since the challenge is for a 100% solid part, wouldn't it be faster to use more shells instead of going through all the direction changes required by infill?by Dale Dunn - Competitions
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
Another successful test. The metadata test also worked fine. The line: - filename: nut.model Should probably read: - filename: nut.sldprt If it ever becomes necessary to do an assembly (I have done nut and washer stack assemblies), the filename extension would be ".sldasm". Can parts of different files have different licenses? I'm not really sure that's possible. I was reading the section oby Dale Dunn - 3D Design tools
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
Quotejreinhardt... No, the design tables get generated when I create a release. The user downloads a zip file with xls design tables and model files, never gets in contact with anything else. For translation one would probably generate individual design tables for each language. So, there is no explicit facility for different users or organizations to apply their own metadata field names? It's aby Dale Dunn - 3D Design tools
Re: 1.75 mm vs 3.00 mm - 11 years ago
Yikes! Maybe I've been spoiled. All my spooled filament has come from Protoparadigm, and it's been great. The stuff I spooled myself from coils was another story.by Dale Dunn - General
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
Quotejreinhardt ... I will start to work on the first two points, maybe get something working already this week. Wow. I didn't think this was such a priority. I'll try to set aside some time to model up some parts in a similar timeframe. The manifest file generates the design table spreadsheets at the local install? For translation and customization. OK, cool. I definitely need to get some modeby Dale Dunn - 3D Design tools
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
Further thoughts on the user's selection process. Some metadata, especially pitch, will be necessary for minimum functionality across all platforms, I think. Especially for users who can't free themselves from inch hardware, where multiple pitches of a nominal size are much more commonly used. You may have noticed in my example files that my configuration names used fixed-width numerical valuesby Dale Dunn - 3D Design tools
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
TL;DR: I like option #2. The question of whether or how to merge standards within a class is a tough one. I'm going to ramble a bit on this, so you can see some of my thought process and not just my conclusions. SolidWorks has a perfectly serviceable component instance replacement tool (replace an instance of a file with an instance of another). A replacement is seamless, and assembly constrainby Dale Dunn - 3D Design tools
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
Success! It didn't take a minute to model up a nut using the parameter names in the spreadsheet. Working in SolidWorks 2011 today, but that would have worked on anything since... 98 or so.by Dale Dunn - 3D Design tools
Re: 1.75 mm vs 3.00 mm - 11 years ago
Quotedestroyer2012 ... Just for the record that is a terrible reason to do anything. Companies don't actively try to make their machine work better. ... They do when they're competing. Still, it's not a good reason to make a choice when you can try to understand the design criteria yourself. Linear filament required changes with the square of the diameter. All your doubling examples should haveby Dale Dunn - General
Re: Extruder Steps per mm Calibration with or without hotend? - 11 years ago
Do it while extruding at speeds you expect while printing. Then there is no question. In general, calibrate in conditions as close as possible to real operating conditions. You might try at speeds above and below normal extrusion speeds too, just to make sure there is no slipping.by Dale Dunn - General
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
Example spreadsheets? Sure. I have three I built up from when I did my SolidWorks version of Prusa i2. I built these on my own time so my employer would have no claim on them. Of course, my work library is much more extensive, and full of legacy mistakes. It's nice to start over from a clean slate sometimes. The SHCS file has some data to the right of Column P that I use as lookup tables when buby Dale Dunn - 3D Design tools
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
SolidWorks things: The spreadsheet must be imported first. Then configurations can be selected. (Configurations can exist without a spreadsheet, but I see no advantage for this application.) Importing the spreadsheet would be necessary for the first use of each model class. Metadata field name translation could be managed by hand at this time by editing parameters in the spreadsheet before imporby Dale Dunn - 3D Design tools
Re: Bronze Sleeve Bearings - 11 years ago
Ideal Newtonian friction is a function of only the normal force and the coefficient of friction. Usually measured with polished rigid pieces sliding over each other. Lubricants, surface imperfections, and deformation all make reality far more complex. Longer oil impregnated bushings will have somewhat higher drag because of the effects of the lubricating fluid's viscosity. Whether that increase iby Dale Dunn - General
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
Configurations are stored in the model files, and the spreadsheet serves as an editing interface and/or as storage external to the model file. The parameters spreadsheet may be imported multiple times to update the model with changes. So, spreadsheets could be distributed to update model files with configurations. These spreadsheets have some specific formatting that SolidWorks uses to recognizeby Dale Dunn - 3D Design tools
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
It sounds like you've been collecting data the same way I have. Frustrating at times, but I guess you just have to deal with that if you don't want to spend thousands on it. Adding new configurations is very easy, so adding a new size for something that's not in the library is easy enough. Even if someone is working from STEP files, altering an existing model to create a new size once in a whileby Dale Dunn - 3D Design tools
Re: Hot end fix or replace? - 11 years ago
Sorry, the pics didn't load for me last time.by Dale Dunn - Mechanics
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
SolidWorks does offer a standard hardware library, but it costs extra. Back when we started with SolidWorks (2000), it was a 3rd party add-on that we didn't think was worth what it cost at the time. We developed our own library. Since that was all done for work, I shouldn't use it for hobby projects or distribute it. So, I like the idea of developing a FOSS library for SolidWorks. I considered STby Dale Dunn - 3D Design tools
Re: Hot end fix or replace? - 11 years ago
I'm not certain, but I think there were multiple hot ends from different manufacturers that used similar components. If you can post a picture of all the parts, someone here may be able to identify it for you, or suggest a proper replacement.by Dale Dunn - Mechanics
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
YAML files... learn something new every day. I'm not sure about other systems, but for SolidWorks it might be easiest (and most useful) to import the data into spreadsheets which SolidWorks can use to generate multiple configurations of a part that has been modeled. That's my tool of choice, so I'll see what I can do with it.by Dale Dunn - 3D Design tools
Re: Variant of Goopyplastic's Tantillus Variant - 11 years ago
Quotecns1 Is that a water cooled thermal break? Yep.by Dale Dunn - Tantillus
Re: Are there any all moving table printers? - 11 years ago
Much better suggestions than the old Makerbot Cupcake.by Dale Dunn - Mechanics
Re: BOLTS, a standard parts library for OpenSCAD and FreeCAD - 11 years ago
Nice! Is that modular enough that other CAD systems could interface via an API and generate component models (with metadata for BOM)?by Dale Dunn - 3D Design tools
Re: Do you measure your test prints hot or cold? - 11 years ago
That would be a nice feature for a slicer's filament calibration. I never remember to scale my stl files.by Dale Dunn - General