QuoteHaydn Hi MKSA, I contracted with a machine shop in China to have these ball studs custom made. They work great in delta printers, because they're inherently zero-backlash. .... Thanks but I wanted to know if they are CNC made from bar stock, or an assembly of a ball (from a bearing) and the screw part, what about the sphere tolerance, roundness and if they were hardened.by MKSA - Delta Machines
QuoteTrakyan I don't plan to use ballscrews, I'm thinking belts should be fine as long as I keep feed rates realistic. @MKSA, A tool that can do a job is no good to me if I can't afford it. It might as well be a fairly tail. And even second hand machines of the type you're talking about are way out of most people's price range. Where I live, these sorts of tools aren't common to begin with so seby MKSA - General
Fast forward a few billion years in the RepRap new world: -Did we evolve randomly from an initial PLA filament from outer space, or a plastic "soup" in the warm ocean ? - Are we the result of a Great Creator or let's say an intelligent designer ? And BTW what are these strange fossils holding what look like primitive weapon ? Were there other forms of life before ?by MKSA - General
What is the question again ?by MKSA - General
QuoteTrakyan MKSA needs to look up what C(Computer)N(Numerical)C(Control) stands for. I'll admit I used the term incorrectly in my OP, but really it just means a machine which can move a tool head that is controlled via a computer, it says nothing of what that toolhead is. It could be a wood router, extruder or laser for all anyone cares. It's just there is an unspoken consensus that CNC is synonby MKSA - General
Quotetgit23 lol... I'm well aware of what they are made for and used for. Never saw them in a US main panel box.by MKSA - Mechanics
These DIN rails are for electric distribution box to clip DIN circuit breakers etc. These are standard in pretty much all of Europe and gaining in other continents. The UL approval was for these breakers in case you want to mount them ! They are totally unsuited for your purpose. Now you have the answer to your question in the title. Plenty of suitable round/square/rectangular profiles in Al orby MKSA - Mechanics
First, please don't call that a CNC, there are just computer driven wood routers. Here is a CNC:by MKSA - General
The MK8 brass crap is just a small module gear ! A good hardened hobb with sharp teeth will bite the filament without requiring extra force and last forever. Cheap that doesn't perform and you replace often is not a good deal.by MKSA - General
How much will you save with these rails compared to how much you will spend to match the rigidity of other type of rails, let even make a working machine ? True, their advantage is that it is easy to mount circuit breakers and electrical devices that are DIN compliant. But are they UL approved ?by MKSA - Mechanics
QuoteBill Clark Quotedc42 If you are not driving a bed heater from 24V then you can use a small 24V PSU, in which case the stepper motors will only move a small amount after you kill the power. Another possibility is to wire an external reset button to the expansion connector. David, I have one of these power supplies. Can I use that for testing? I would set the current limit to just above theby MKSA - General
QuoteDjDemonD Good idea definitely worth considering. Depends if we go to a microprocessor or stick with analogue. It's worth thinking about as most issues are reverse polarity rather than anything more complicated. The other advantage of a software solution is that you can better protect the design from the thieves from over there.by MKSA - General
Quoteo_lampe QuoteDJ I wonder if we can design a polarity independent circuit. I think, that's called "precision rectifier", an op-amp circuit that rectifies the signal without diode voltage losses. Wikipedia A simple bridge rectifier would be enough considering the high voltage output by piezo. In fact it would even clip the low level noise.by MKSA - General
QuoteMoriquendi Schematic for the v2 boards is here, I could have sworn I posted it on our website somewhere but obviously not. Your first stage is more of an Integrator than a differentiator ! A low pass filter. (with the R in // with the cap)by MKSA - General
You put high Amp limit switches that will open the circuit to the motor coils and short circuit them (eventually through a low value resistor). The switches will suffer but braking effect guaranteed.by MKSA - General
I feel insulted and eager to abuse the moron who committed this "infomercial" !by MKSA - General
Save the planet, no more CO2 in the atmosphere please. I even stopped drinking soda !by MKSA - General
QuoteMechaBits @Olampe, your right on one thing about the bar on the right, it stops any unwanted movement, it is passive and doesnt bind, most of my other printers have rods to the right, ie 2 rods near each other, i've been told a few of them would rack too. The other new arm I have will have 2 rods closer to each other, with the rail coming out from them. @MKSA The Prusa with all the threadedby MKSA - General
Quotewhosrdaddy QuoteMKSA Could you test if their hobbed gear is really heat treated ? That is hardened and a hacksaw or a chinese file should not bite into it. I have no intention to ruin my perfect working extruder I don't know if it is hardened steel (it is certainly steel) and frankly I don't really care as long as it is doing it's job... The test is non destructive. Just that I am tired oby MKSA - General
Quotenewbob I have no idea what amount of pressure would be needed - that would not be my biggest concern. More troublesome would be assuring that exactly the same amount of pressure over time would move the needle. If amount of pressure or time varied from retraction to retraction, system would never 'know' if plastic have been extruded through the nozzle or used to move the plunger. Not enoby MKSA - General
Why blindly follow ? The Prusa is just an evolution of this set up. It doesn't require such a sturdy base, beefy smooth rods and even beefier brackets to secure them to the base. Easier to make the rods // and stay //. Two more bars from rod tops to the base and it is rock solid. The main issue of the Prusa is the moving Y table (and the two Z motors for the original and clones)by MKSA - General
Quotewhosrdaddy I bought 3 titan aero's from Trianglelabs (mated will real E3D blocks) and they do perform wonderful. The biggest gripe I have with E3D atm is the pricing, it's too expensive. For the same price of 1 real Titan Aero, I now have 3 clones... Could you test if their hobbed gear is really heat treated ? That is hardened and a hacksaw or a chinese file should not bite into it.by MKSA - General
QuoteLoboCNC QuoteMKSA And what pressure do you think it will have to act upon ? If there is no leak, a 1 bar in the "air chamber" at room T° will become how much at let say 200° ? If the temp (in Kelvin) is increased by 2/3rd (300K to 500k), then the pressure in the air chamber should also increase from 1 bar to 1.66 bar.. An alternative to this that I'm pondering is replacing the siliconeby MKSA - General
Quotepivan To whom it may concern :-) Apologise if I unearth an old post... seems the better thread to post a contribution on this. Got the cloned Titan extruder about 1 month ago, and it works fine. The gear+hobbed is the latest one (hardened steel hobbed, gear seems plastic). E3D shouldn't hate me too much because I decided to go for an original E3D V6 Lite as hotend. Unless when not properby MKSA - General
Quotenewbob QuoteLoboCNC OK, here's another version of the anti-ooze valve that eliminates the complex extruder motor driven actuation and instead uses the differential extrude/retract pressure to operate the valve, as leadinglights suggested. It uses compressed air in a small chamber in the heater block to push the valve pin against the inside of the orifice during retraction, when the inner prby MKSA - General
Enough plus 10% margin while being conservative by staying at less than 10% of the max.by MKSA - General
QuoteJonathanC Hi So I am doing a university project building a RepRap 3D printer and was wondering which would be the best to build? Ideally one that is relatively cheap,easy to make and easy to source parts for. Thanks Jonathan Business school ?by MKSA - General
QuoteHaydn I'm impressed! This is very clever! I'd say it's ideal to have a gap of about 0.05mm between the magnet and ball stud. Who is the supplier for these balls ? Eventually, do you make them ? If yes how, what kind of steel, heat treatment, finish ?by MKSA - Delta Machines
QuoteMCcarman I wouldn't uses the Roses metal as its difficult and local. I believe the tyre kits come with a connector to attach to the tyre. If you modify this and fit a plastic pipe instead of the tyre you can route the pipe all round the cabinet. The pipe can have a nice low melting point - say 100C. This will melt where it is hot and deliver the C02 at the melting point. I wouldn't think youby MKSA - General
Anyway, in a well closed steel cabinet, the fire will die out.by MKSA - General