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Guys? Gals? All of you are devs. This is development.
Re: Sanguish development - 11 years ago
The drivers are $4.40 (1) (£2.84), $3.87 (£2.52) (10) from deal extreme (china and you may have to wait) http://dx.com/p/ic-tb6560ahq-for-stepper-motor-driver-controller-122551by annodomini2 - Controllers
Re: Heavy build platform. Two stepper motors on Y axis? - 12 years ago
You'd need to run a single motor with the current actuation design. (Prusa, mendel etc)by annodomini2 - Controllers
Re: ARM DIP package at US1,26 to the rescue - 12 years ago
PWM Can be implemented in software. This has a Nested Vectored Interrupt Controller, So running a fast interrupt process to implement the switching, assuming the I/O can handle it.by annodomini2 - Next Wave Electronics Working Group
Re: Experimental Power Supplys - 12 years ago
aka47 Wrote: ------------------------------------------------------- > I guess if ebay has the answers for one it may > have the answer for the other... > > > sformer-Power-Supply-Driver-80W-12V-for-MR16-MR11- > /221027629675?pt=LH_DefaultDomain_0&hash=item33764 > 5fa6b > > 1$ $3.58 to the USby annodomini2 - Controllers
Re: Can you test driver chips outside of electronics? - 12 years ago
Linear VReg's get hot for 2 Reasons: 1. Too much current 2. Too much voltage drop. What voltage are you operating the steppers at? Also hot is a relative term, electronics can quite happily run at temperatures that are uncomfortable for a person to touch.by annodomini2 - General
Re: Raspberry Pi based electronics ideas - 12 years ago
There are some DIP Cortex-M3's and M0's http://www.digikey.co.uk/product-detail/en/LPC1114FN28%2F102,12/LPC1114FN28%2F102,12-ND/3430860 Luminary micro did a dip unit, but I'm struggling to find a reference.by annodomini2 - Controllers
Re: ARM variant electronics - 12 years ago
sam0737 Wrote: ------------------------------------------------------- > I don't know if anyone has interested in .NET > Micro Framework (running C# on ARM with no OS, > could debug with Visual Studio). AFAIK it was > ported to STM32 architecture recently. That said, > developing C# on Linux/Mac might not be fun at > all, I havn't try. > > I would love to have my electroby annodomini2 - Next Wave Electronics Working Group
Re: Raspberry Pi based electronics ideas - 12 years ago
Annirak Wrote: ------------------------------------------------------- > PIC32 is MIPS32, which has gcc support. But is the PIC32 supported as a result? And if so, how well is it supported?by annodomini2 - Controllers
Re: Raspberry Pi based electronics ideas - 12 years ago
Annirak Wrote: ------------------------------------------------------- > bobc Wrote: > -------------------------------------------------- > ----- > > I'm not sure what "linear upgrade path" means > > here. There are some PIC32 in a 28 pin > packagge, > > they are 3.3V, and of course not register > > compatible with AVR, so not exactly a seamless > > transby annodomini2 - Controllers
Re: Peltier for hotend on emaker - 12 years ago
theodleif Wrote: ------------------------------------------------------- > The cooling side must be less than 100°C. > Otherwise water would vaporize. > > A 6R8 resistor will heat up the hot end with 21.2 > watt @12V. A 60W peltier should be more than > sufficient to keep the cooling side (where only a > fraction of the 21W will arrive) cool, as it seems > to me. > &by annodomini2 - General
Apparently New 3D printing technique - 12 years ago
http://www.theengineer.co.uk/in-depth/fruits-of-the-loom/1013156.article Hope it works out. I am curious if we could use an extrusion/injection head to eliminate the mould?by annodomini2 - General
Re: Raspberry Pi based electronics ideas - 12 years ago
bobc Wrote: ------------------------------------------------------- > Annirak Wrote: > -------------------------------------------------- > ----- > > I still need a control board, so I'm going to > try > > and port the Marlin firmware to an Arm > > Cortex-M0/3. I'm partial to the LPCXpresso, > > particularly the LPC1769 variant for a number > of > > rby annodomini2 - Controllers
Re: Why are filament spools so expensive compared to pellets? - 12 years ago
nophead Wrote: ------------------------------------------------------- > If you make the cylinder say 1L then you could > extrude about 1kg in one cycle and that would make > a reasonable amount to use on a printer. So unless > you want a continuous cycle to be able to make > enough to sell you don't need the complexity of a > multi-stroke machine. Just a heated cylinder and a &by annodomini2 - General
Re: Why are filament spools so expensive compared to pellets? - 12 years ago
http://en.wikipedia.org/wiki/Plastics_extrusion Good overview description of what happens to the air on wikipedia. Making a custom profile auger will be the challenge. How about as a mad idea: Rotary piston pump ie several cylinders that feed a pellet and squeeze it into the melt chamber? Would be a pig to get working.by annodomini2 - General
Re: Why are filament spools so expensive compared to pellets? - 12 years ago
But does the pressure at the nozzle not create enough deltaP to encourage the air back to the top? Or is it that the melt chamber is held in vacuum?by annodomini2 - General
Re: Why are filament spools so expensive compared to pellets? - 12 years ago
Couple of Questions: Is Air less dense than the molten ABS or PLA? If so and the Auger was vertical would the air not try and rise out of the melt chamber? Obviously viscosity would come into play.by annodomini2 - General
Re: Crimping molex connectors - 12 years ago
I have one of these, works well: http://www.ebay.co.uk/itm/Crimping-Tool-Molex-0-1-and-0-156-Terminals-HT-225D-/170752067857?pt=UK_AudioElectronicsVideo_Video_TelevisionSetTopBoxes&hash=item27c19dc911by annodomini2 - Reprappers
Re: Hacks I'm not Proud of... - 12 years ago
Maybe we should have a bodge of the month? People post their bodge's for the previous month, people vote. The winner gets a bodger of the month tag next to them on the forum.by annodomini2 - General
Re: Contacts info for a get together - 12 years ago
Have fun guys, no chance I can make it, but look forward to hopefully making a future one.by annodomini2 - West of England RUG
Re: Understanding acceleration - 12 years ago
No, going back to basic physics: Force = Mass x Acceleration From an axis perspective; If you set no acceleration and command a speed of say 200mm/s the motor needs to accelerate the mass of the axis from 0 to 200mm/s in 1 step (duration is proportional to commanded speed and is effectively non-linear). So it either has to be capable of generating ridiculous forces, which would probably break tby annodomini2 - General
Re: Understanding acceleration - 12 years ago
They key part is flow rate from the nozzle and the rate of change of flow rate. The robot is much, much, much faster than the extruder. The key is determining the peak acceleration and deceleration in the flow rate, this will determine the peak acceleration/deceleration in the robot. A machine is only as fast as its slowest component.by annodomini2 - General
Re: Freescale's DEMOQE128 board - 12 years ago
I doubt it: 1. Expensive 2. Obscure processor 3. Tool chain will not be freeby annodomini2 - Controllers
Re: A $40 32 bit ARM PCB with SD card and colour touchscreen included! - 12 years ago
Std ramps or sanguilolu etc use: 1 PWM if just Extruder or 2 if heated bed. Not 8.by annodomini2 - Next Wave Electronics Working Group
Re: Please Help! Stepper Motors losing Steps - 12 years ago
nophead Wrote: ------------------------------------------------------- > Have you adjusted the current on the stepper > drivers? > > Should be set to about 1A by adjusting the pot > until VREF = 0.4V for Pololus and 1.6V for > Stepsticks. Is this on a page in the Wiki? Sounds like useful information to get in there.by annodomini2 - Controllers
Re: A wall painting machine - 12 years ago
VDX Wrote: ------------------------------------------------------- > ... can it be a spray-bot too? - Looks good, but room for improvement. Looks to me like it could do with a third motor to control the tension in the belts, or at least add weight to the print head. Would a airbrush gun be more effective than cans?? Better control of the flow rate?by annodomini2 - Reprappers
Re: A Simpler 3D Printer design - 12 years ago
Look at the Polar robots forumby annodomini2 - General
Re: Difference between the 1.75 and the 3mm hot ends??? - 12 years ago
Bruce Wrote: ------------------------------------------------------- > Nathaniel, > > > > That's a common misconception. What Joe was trying > to tell you in his Ps. is that the hole in the tip > where the melted plastic comes out is what > dictates the printing resolution not the size of > the filament going in. > Also, I don't think anybody has mentioned yet thaby annodomini2 - Reprappers
Re: Raspberry - 12 years ago
JoeDaStudd Wrote: ------------------------------------------------------- > The Raspberry Pi (model is due to be released > in the next few days/weeks > > I was wondering if anyone had ARM binaries for any > of the RepRap host and slicing software? > > If they are or they can be compiled then I could > see it being an awesome addition to any RepRap > setup. I'm thinby annodomini2 - Controllers
Re: Liner Cooked? J Head IV - 12 years ago
Depends on your nozzle diameter, the smaller the nozzle the lower the flow for a given pressure.by annodomini2 - General