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RepRapPro's Ormerod http://reprap.org/wiki/Ormerod
Re: peltier junction heated bed? - 13 years ago
That would be possible, though I think that a resistance heater would be a lot more efficient, but I could be wrong.by NewPerfection - General
Re: Skeinforge BASICS? - 13 years ago
As for extruding a box around the part... I just added some custom g-code to the start of each gcode file (RepSnapper can do this, as well as Skeinforge) that extrudes a few parallel lines starting from (0,0) and then starts the object print. Pretty simple.by NewPerfection - Skeinforge
Re: Print raft only? - 13 years ago
boarboar Wrote: ------------------------------------------------------- > Thank you for that solution. Isn’t the raft > always a bit bigger than the item being built? > Once I discover exactly what that is I could allow > for it. This still leaves the issue of the > diameter and spacing of the filaments being > printed in the raft. I still need to figure out > how to change tby NewPerfection - Let's design something! (I've got an idea ...)
Re: Need help building extruder nozzle - 13 years ago
MrJohn Wrote: ------------------------------------------------------- > I'm trying to figure out how to build the extruder > nozzle but I'm confused about how to bond the > resistor to the heater block. Do I use fire > cement, epoxy or nothing? You can just wrap the resistor in aluminum foil and shove it in the hole. That works well if you don't want to mess with fire cement.by NewPerfection - General
Re: percentage indicator on LCD display on a Prusa. code help. - 13 years ago
macsoft Wrote: ------------------------------------------------------- > when i finish my hack i'll post the firmware and > instructions on how to connect the lcd. That would be great. I know I've been wanting to add an lcd for a while.by NewPerfection - General
Re: What is the main constraint for building large objects - 13 years ago
Warping is the biggest barrier, second is time. The bigger/taller a print is, the more warping affects it. This isn't as big an issue with PLA, but is a huge issue with ABS. Heated beds get around this, but they wouldn't work for something really big. The only real option would be to have a heated build chamber. As for time, a human size object would take forever to print, even commercial FDby NewPerfection - Reprappers
Re: Print raft only? - 13 years ago
I posted this in your other thread, but in case you don't see it here you go: QuoteEasiest way: create a box the size you need and say 1 mm thick. Set skeinforge to print a raft, and then in the carve settings set the layers to go from 0 to 1. Under Raft set the Object first layer flow rate to 0, and turn off the Fill plugin. That way it will print the raft, then try to print the outline of the fby NewPerfection - Plastic Extruder Working Group
Re: Print raft only? - 13 years ago
Easiest way: create a box the size you need and say 1 mm thick. Set skeinforge to print a raft, and then in the carve settings set the layers to go from 0 to 1. Under Raft set the Object first layer flow rate to 0, and turn off the Fill plugin. That way it will print the raft, then try to print the outline of the first layer but with no flow, and then it will be done.by NewPerfection - Let's design something! (I've got an idea ...)
Re: Plug-N-Play Electronic Box 
- 13 years ago
macsoft Wrote: ------------------------------------------------------- > lol i see lots of people printing boxes. But its a > very big print for me. too expensive, i can only > print PLA right now You can't print large boxes with ABS without a good heated bed. You can with PLA though. I can't imagine a big box taking more than a couple bucks worth of PLA, especially since it doesn'tby NewPerfection - General
Re: RepSnapper - Z axis not working - 13 years ago
anode505 Wrote: ------------------------------------------------------- > Update: > > If I have a 1mm layer it seems to work. .8mm it > doesn't really move. (certainly not the .8mm. I > have a dial indicator on it) > > Is there a way to abort a print? Pause works as a > pause. but the printer resumes at the pause spot. > I hae been just restarting 'snapper. reby NewPerfection - General
Re: Skeinforge 40 Changes to Dimension - Read this for problems with the new version of Skeinforge! - 13 years ago
Quotebrnrd Why would you want to change the width over thickness ratio when you change layer height? I just leave it at 1.5 regardless on whether my thickness is 0.4 or 0.3 mm. That's not too good of an idea. Ideally you want to be moving at the same speed that you are extruding. If you increase layer height but leave width over thickness the same, you have to increase flow rate more than feedby NewPerfection - Skeinforge
Re: How do we both encourage RepRap mutations and stay focussed? - 13 years ago
Bear Wrote: ------------------------------------------------------- > Well, hooray for some progress. Seriously, that's > a fundamental facility that was really needed. > > Is the format stable? Will it survive revisions > of their CAD software? Is there a documented > semantics? Will someone be able to open these > "Openscad" files in ten years, and if so will they >by NewPerfection - Developers
Re: Skeinforge 40 Changes to Dimension - Read this for problems with the new version of Skeinforge! - 13 years ago
You have to have "add flow rate" checked, otherwise Dimension does nothing. Also, 1 mm movement in E is 1 mm of the feedstock, it has nothing to do with how much plastic goes in or out of your nozzle. This is the big change in 40 vs 39. Read this for a more thorough explanation.by NewPerfection - Skeinforge
Re: Alternative to timing belts - 13 years ago
Or, you could just use ball chain.by NewPerfection - Mechanics
Re: Skeinforge 40 Changes to Dimension - Read this for problems with the new version of Skeinforge! - 13 years ago
Now when you change the layer height all you change is the width over thickness value. Packing ration, feed filament size, and flow rate should always be constant. The layer height and width over thickness are now the only values that control how much plastic is laid down. You can change the flow rate to adjust the amount up or down, but if you do you should just make that % adjustment to yourby NewPerfection - Skeinforge
Skeinforge 40 Changes to Dimension - Read this for problems with the new version of Skeinforge! - 13 years ago
I just posted this in another thread here, but I figured a lot of people would have the same issue I did so I'll give it its own thread. As soon as I upgraded to Skeinforge 40, suddenly I was getting almost nothing coming out of my extruder. This is why: QuoteThe Dimension plugin changed for skeinforge 40. You need to change your firmware e_steps_per_mm to steps per mm of feedstock, rather thaby NewPerfection - Skeinforge
Re: How to print single walled test part. - 13 years ago
brnrd Wrote: ------------------------------------------------------- > You're welcome. I just tried this today with > Skeinforge 040 and used it to adjust the flow > rate. Surprisingly, the flow rate values are very > large! It's about 40x larger than the feed rate. > With 035, it was less than 2x feed rate. Not sure > why there's such a large difference. The Dimension plugin cby NewPerfection - Skeinforge
Re: low torque - 13 years ago
nophead Wrote: ------------------------------------------------------- > There are three types of stepper motor: > Variable reluctance. > Permanent magnet. > Hybrid. > > Reprap uses Hybrid and yes they do contain > permanent magnets but they also have pole pieces > on the rotor as well as the stator, like VR, which > is why they are called hybrid. Good to knoby NewPerfection - Stepper Motors, Servo Motors, DC Motors
Re: Belts and pulleys affecting quality - 13 years ago
Zumba Wrote: ------------------------------------------------------- > nophead Wrote: > -------------------------------------------------- > ----- > > No the UP uses belts and linear slide bearings. > > > Then why is it higher res? Better quality control mostly, since the entire machine is made by one company and not assembled by the end-user.by NewPerfection - General
Re: 1.2 motherboard/gen3 electronics still good? - 13 years ago
Zumba Wrote: > you mean I have to get a mainboard+extruder > board+stepper driver on top of the extruder board > to use the extruder without issues? Is this only > with RAMPS? > > I had planned to use an industrial stepper driver > for the 3 axes but this adds another issue I never > anticipated You're getting mixed up. RAMPS is an all-in-one solution, see . If you haby NewPerfection - General
Re: Battery powered 4-5 port Network switch - 13 years ago
As long as the switch takes a reasonable voltage (less than ~12V), it would be easy to take a small switch and attach a battery pack to it.by NewPerfection - Let's design something! (I've got an idea ...)
Re: .9 degree steppers. Do I need to change settings anywhere? - 13 years ago
I use 0.9 deg stepper motors with 1/8 stepping and very small pulleys, giving me something like 80 steps per mm. I have no issues with it at all.by NewPerfection - Stepper Motors, Servo Motors, DC Motors
Re: low torque - 13 years ago
karandex Wrote: ------------------------------------------------------- > reprap uses hybrid motor. All general motors are > hybrid. Stick to metal to your mendel motor when > turn off and tell me its is permanent magnet or > not The rotor in the middle is a permanent magnet. The outer shell of the motor is the coils. They are most definitely permanent magnet motors. I have takenby NewPerfection - Stepper Motors, Servo Motors, DC Motors
Re: Help in understand the electronics needed for a custom build. - 13 years ago
HereinCS Wrote: ------------------------------------------------------- > What would happen if I drive a 3.2a motor with a > driver capable of only 2.8A? You just won't get the maximum torque capable of the motor, that's all. No biggie. Be careful that the motor driver doesn't over heat though if you use it at the max 2.8A current though.by NewPerfection - Controllers
Re: 1.75mm filament - 13 years ago
nophead Wrote: ------------------------------------------------------- > The area of a 1.75mm circle is 2.4053mm, so steps > per mm is 2.94 times higher, i.e. (3.0/1.75)^2. Eh, you're right. I mistyped something in my calculator :/by NewPerfection - General
Re: 1.2 motherboard/gen3 electronics still good? - 13 years ago
It doesn't support a second extruder explicitly, but it would be easy to add. A carrier board could be added with support for another stepper driver and heater controller easily.by NewPerfection - General
Re: 1.75mm filament - 13 years ago
Your e_steps_per_mm will need to be much higher. 3 mm cross section is 7 mm^2, where 1.75 mm cross section is 1.2026 mm^2, meaning your e_steps_per_mm will need to be 5.82 times higher. Also, you will be able to do short runs of 1.75 mm filament in your hot end, but it will backflow eventually and plug up. You will need a new, smaller hot end. You just need a new thermal barrier and barrel, eby NewPerfection - General
Re: Nozzle/electronics resource questions - 13 years ago
I would recommend RAMPS for sure, it's what I am running and I like it a lot. The only issue is that the Pololu stepper drivers appear to be in short supply, I haven't been able to find any for a while. Also, check out for hot end parts.by NewPerfection - General Mendel Topics
Re: use of codec to speed up gcode operations - 13 years ago
That sounds awesome. I experience significant slow downs when many short segments are sent, such as printing a high resolution circle. I imagine that this is because of the USB delay, since I am running at 115200 baud. I also have noticed slow downs when trying to do anything else with the computer, it looks like your idea would eliminate that as well. Having the codec be separate from your hby NewPerfection - General
Re: Printing a Prusa Mendel - 13 years ago
nophead Wrote: ------------------------------------------------------- > Also the block of my Wade's extruder gets way too > hot to be made from PLA. That is a good point. I have to use a fan blowing across the thermal barrier to keep the PLA extruder block from getting warm and deforming. With the fan though I haven't had any issues.by NewPerfection - General