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(Contents under pressure) -> http://objects.reprap.org/wiki/Paste_Extrusion
Re: Idea: A blacksmith bot based on Simpson - 11 years ago
dudesom Have you seen those pin blocks, where you put your hand into them and it keeps the shape, I imagine your idea like that, I have seen special vices with an array of adjustable pins to hold awkward items, and I saw a similar device that has cnc controled pins with a flexible top sheet, it could create sone nice curved shapes. I should have said pneumatic silencer not filter,by johnrpm - Delta Machines
Re: Electronics and software combination questions - 11 years ago
I recently bought the chester champion v20, very nice, those motors may struggle a bit maybe,especialy if you want rapid moves, have you tested the code, with motors connected to the drive boards, or LED's. Edit, although its a small lathe I would suggest a minimum of 2amp motors and drives to match, preferably bigger, especialy on the saddle.by johnrpm - General
Re: I want to pay to do advertise on forums - 11 years ago
Thanks for voting NO, you have restored my faith in human nature.by johnrpm - Administration, Announcements, Policy
Re: Idea: A blacksmith bot based on Simpson - 11 years ago
Interesting stuff, I can not see the image though, I had thought of modifying the weld for support balls so they break away easy, but his idea of a sacrificial ball is worth trying. Sorry to highjack this thread, one day I will try it out.by johnrpm - Delta Machines
Re: Wax printing - 11 years ago
I second that, I am building a dlp 3dprinter, so playing with projection lamps, a car headlamp bulb, 100watts focused down to a small point burns the fingers.by johnrpm - General
Re: Insulated Building From Recycled Material - 11 years ago
I have a tree pruner, it has a telescopic pole to reach high branches, but the buisness end has a rope and pulley system, it imparts a tremendous force on the branch, maybe something like that but scaled up may work.by johnrpm - Let's design something! (I've got an idea ...)
Re: Electronics and software combination questions - 11 years ago
Robin2 Thanks for the info, the Mega is a safe option, gives more flexibility, maybe a CF card etc, Can you post some of your code, so that I can try to understand it. notice the word TRY.by johnrpm - General
Re: Electronics and software combination questions - 11 years ago
Robin2 What drive board have you got in mind.by johnrpm - General
Re: Idea: A blacksmith bot based on Simpson - 11 years ago
Tried the mig welder thing some 20 years ago, Krupp have it patented, but as far as I know no patents on the ball bearings, if fed down a single tube at first, with an arresting collet, as each ball is welded the next ball takes its place, when the teathing problems are ironed out, a linear array may be employed.by johnrpm - Delta Machines
Re: Idea: A blacksmith bot based on Simpson - 11 years ago
I just have too many things on the go to do it, but if you have seen pnuematic air filters, the part should look similar, bone would adhere, so good for implants, all sorts of other things come to mind, but the tech is doable.by johnrpm - Delta Machines
Re: Electronics and software combination questions - 11 years ago
Others who have far more knowledge than I could answer this better, but I would be concerned that relying on timeing alone would lead to inacuracy, if a step equals a certain distance, then N steps equals a definate value, whereas small errors in timeing could add up, that is if I understand correctly what you propose. P.S do you not think it would have saved a lot of time asking the above in tby johnrpm - General
Re: Idea: A blacksmith bot based on Simpson - 11 years ago
I know I have been banging on about this for some time, but why not use small ball bearings. (ballpoint pen size) and have a bank of capacitors, place each ball and zapp weld to the previous ball. infiltrate if needed. Must get around to building it one day.by johnrpm - Delta Machines
Re: Electronics and software combination questions - 11 years ago
. All I've been hoping to find was a description of the principles necessary for 3D printing to work if you ever find them let us know. they are reluctant to make the underlying secrets public. SSSSSSSSSSHHHHH don't tell everyone you'l let the cat out of the bag.by johnrpm - General
Re: Revival of the Bits from Bytes Community - 11 years ago
I get a 404 from that link. I can see why people buy kits or pre-built printers, but you are then at the mercy of their marketing department, and you count for little in the end, build your own system, then you are in control, and get to learn and be creative, not just an end user.by johnrpm - General
Re: Electronics and software combination questions - 11 years ago
For the lathe, lets assume you have the gcode from a cam system or hand coded, this is sent to an arduino for example having grbl, teacup, or whatever firmware you prefer, ( which is pre configered to get the best stepper performance for your machine), the uno outputs step and direction signals to the stepper drive boards, then to the motors. the arduino acts a bit like mach3 or linuxcnc, but tby johnrpm - General
Re: Insulated Building From Recycled Material - 11 years ago
watched the TED talk, very interesting, did not realise things had advanced so much, no excuse not to use it. could styrofoam be modified into a more ridgid material for 3d printing as so much goes to landfill ?. P.S I understand that termites have been harvesting mycelium for millions of years.by johnrpm - Let's design something! (I've got an idea ...)
Re: Electronics and software combination questions - 11 years ago
I may be missing something, (won't be the first time) but I can not see the problem with GRBL controlling a lathe, maybe if you explained in simple terms, so a numpty like me could understand what you are trying to achieve.don't get me wrong but it seems you are trying to re-re-invent the wheel, nothing wrong with making your own tool chain if thats the plan.by johnrpm - General
Re: 2 webcams scanner " LIKE " the kinect - 11 years ago
I think the kinect has a infrared projector creating an array of dots, the displacement of the dots gives the depth, at least thats my understanding.by johnrpm - 3D Scanners, Book Scanners, and Optics
Re: Electronics and software combination questions - 11 years ago
Wise words from BOBC, as always his comments are based on wisdom, I always listen to what he says, its usually right.by johnrpm - General
Re: Tech Forecast for 3D Printing - The Homemade mAcrochip - 11 years ago
lee1, I think I can see where you are going with this, things dont need to be small, they were not small in the recent past, building blocks of discreet componants can do some amazing things, they did in the recent past and still can. If I had the time I would be up for this, I know this work is being done behind closed doors and funded, so making it non patentable is good, and by giving it focuby johnrpm - General
Re: IceSL - 11 years ago
Speaking from a selfish point of view, and as I am building a DLP printer, it would be nice if it had that functionality, seems that software for fillament printers is well covered, but little for DLP. It may be that I have not found it though.by johnrpm - Experimental
Re: Insulated Building From Recycled Material - 11 years ago
EdEarl, Keep treading your path, I for one will keep reading your efforts.by johnrpm - Let's design something! (I've got an idea ...)
Re: Cyclops - A Sideways step on DIY SLA idea - 11 years ago
LShearer, thanks for the link, I think your idea has legs (mainly because I worked on something like it some time ago) I may be wrong but laser printers with polygons seem to be getting rare, they use light bars instead, (cheaper), another approach that seemed good was to have a laser projector, seach for "kuntman laser", unfortunate name, but he created a projector from parts that cost pennies,by johnrpm - Developers
Re: Design Advice - 11 years ago
maybe its the perspective, but the table does not appear to get full travel, also the triangle brackets may be hard to find, but they are minor details, nice modelling.by johnrpm - General
Re: Delta Ceramic 3D Printer (need help) - 11 years ago
as stated above, mach3 and linuxcnc are good, turbocnc worked in dos and is still available I think, hardware is getting rare but still out there with pport, I just got this very lappy with pport I am now typing on, which is intended to be a mc controller at some point. Your system will probably evolve over time.by johnrpm - General
Re: Don't let forum & wiki die! - 11 years ago
I fully understand the need to upgrade serverside, but can I ask that the appearance and navigation remains simple and clean, without popups asking me if I need botox or something, cnczone is a good example of clutter, and please please please no social media, lets not go down the twatterbook road. I fully realise that I am a dinosour and am most likely in a majority of one.by johnrpm - General
Re: Mach3 and Slic3r - 11 years ago
If you select mach3 as the gcode flavour I think it outputs A for extruder, which probably does not help, why not change the setup in mach3 or gang the motors together, else in a good editor use replace, notepad++ is good.by johnrpm - Mach3
Re: Delta Ceramic 3D Printer (need help) - 11 years ago
Have you looked at fabathome, not sure if its still active.by johnrpm - General
Re: PSU Blew Up - 11 years ago
Unlike a big old transformer, the componants in swithchmode power supplies are stressed more, and if the componants are not of good quality are liable to failure in my experiance, this is not based on electronic expertise, but practicle observation, so may be wrong.by johnrpm - General