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Re: Really Fast Heating of the Nozzle...? - 12 years ago
I don't think the question was about PID tuning, it was about increasing the frequency of temperature measurements. Can that be done?by jbayless - General
Re: nema17 motor power - 12 years ago
nophead Wrote: ------------------------------------------------------- > The temperature rise is directly proportional to > the power regardless. The temperature rise is proportional to the dissipated power (I^2*R), but not the input electrical power (I*V), because a lot of the voltage drop comes from the back-emf of the motor as it is spinning. A higher voltage source can drive a motor atby jbayless - General
Re: Recycler! New Gada Prize team! - 12 years ago
JohnnyCooper Wrote: > Is anyone else having trouble visualizing why an > auger would drive material forward at any real > pressure? Shouldn't the plastic granules just > tumble to the front of the screw and then spin > clogging the flutes? The forward pressure actually comes from friction against the outer tube. Ideally, the plastic will have zero friction with the screw threads,by jbayless - Kartik M. Gada Humanitarian Innovation Prize
Re: McMaster.com seems popular on here but.. - 12 years ago
That's what people thought about Sony...by jbayless - General
Java Host Sprinter - some setup issues - 12 years ago
Hi, I've encountered some issues while setting up Adrian Bowyer's Java Host Sprinter firmware. I have RAMPS 1.4, I'm running Windows 7 (64-bit) with 32-bit Java in Eclipse. I've set up Java Host on my machine in Eclipse so that I can spy on the serial transmissions in debug mode (I just put system.out.println commands where it reads and writes to the serial port) to see what RAMPS and Host areby jbayless - Firmware - mainstream and related support
Re: Teacup incorrect response to M105 command - 12 years ago
Ok, I've adjusted it to work with RepRap Host. I may have now found another bug: I say: G1 Y28.5 F3111.0 RepRap says: k RepRap says: ook ERROR: GCodeWriter.waitForResponse() - dud response from RepRap: k (hex: 6b20) [411.463s/32824ms] ERROR: GCodeWriter.waitForResponse() - dud response from RepRap: ook (hex: 6f6f6b20) [411.463s/32824ms] RepRap says: ok It looks like there might be a typby jbayless - Firmware - mainstream and related support
Re: Hotend theory - 12 years ago
Hi Jan, That's a very worthy goal! I'm curious to hear how you made the 0.35 mm nozzle. But your blog seems to be marked private and only invited readers can read it at the moment. Jacobby jbayless - General
Re: Teacup incorrect response to M105 command - 12 years ago
I've tracked this down in the code, and it looks like it was deliberately programmed for the case where REPRAP_HOST_COMPATIBILITY is less than 20110509. I guess the old RepRap Host software for some reason expected a newline there?by jbayless - Firmware - mainstream and related support
Teacup incorrect response to M105 command - 12 years ago
Hi, My Teacup firmware has the following behaviour: I send: M115 Teacup sends: ok FIRMWARE_NAME:Teacup FIRMWARE_URL:http%3A//github.com/triffid/Teacup_Firmware/ PROTOCOL_VERSION:1.0 MACHINE_TYPE:Mendel EXTRUDER_COUNT:1 TEMP_SENSOR_COUNT:1 HEATER_COUNT:1 I send: M105 Teacup ends: ok T:317.75 Note that there is an endline between the "ok" and the "T:317.75". This is causing RepRap host to getby jbayless - Firmware - mainstream and related support
Re: Can't compile Teacup firmware - 12 years ago
ElectroNick Wrote: > Bryan's solution would make sense but there surely > is no file named thermistor.gen7.h or > thermistor.default.h or anything like thermistor.h > anywhere in the Teacup distribution - just the > ThermistorTable.h. So, for the uninitiated, > where does that file come from? Just wondering if anyone has an answer to this question. Edit - okay, I have an ansby jbayless - Firmware - mainstream and related support
Re: Installing from source: Wiki instructions are vague - 12 years ago
Never mind, I figured it out and updated the wiki instructions. It'd still be good if someone with more experience (especially with a non-Windows OS) can check that I wrote it all up correctly. Jacobby jbayless - RepRap Host
Installing from source: Wiki instructions are vague - 12 years ago
Hi everyone, I'd like to install the RepRap Host software from source in Eclipse (running Windows 7). I've followed the instructions right up to the end, where it concludes with: QuoteTo work with the Java source code you will need the system-dependent libraries that RepRap uses. Those are in the directory Reprap/lib/system-dependent/. You will need to copy (or create links to) the .so files (Lby jbayless - RepRap Host
Re: Front page sidebar formatting issue? - 12 years ago
Hmm... I upgraded to Firefox 10 and it's back to normal now.by jbayless - General
Front page sidebar formatting issue? - 12 years ago
Hey, Is it just me, or have all the items and links (for example, link to the forums) on the front page sidebar been pushed way down to the bottom of the page? It's been like this for me for a while, but I haven't seen anyone else mention the issue, so I'm not sure if it's just something peculiar with my browser. (Firefox 9.01) Jacobby jbayless - General
Re: New Conductive ink - inkjet compatible apparently - 13 years ago
Maybe. Silver-based inks are generally expensive and susceptible to corrosion, but it might be worth the tradeoff.by jbayless - General
Re: Hardening Rods - 13 years ago
Are you sure that stainless is harder? I didn't think that it was.by jbayless - General
Re: GNU License Questions - 13 years ago
jkomp316 Wrote: ------------------------------------------------------- > I say, let the corporate interests play. Makes no > difference to me. I'm waiting for the day HP > makes an affordable 3d printer. I will be first > in line to buy one. I'll take it straight home, > rip out the circuit boards, throw away the > proprietary software cd, and wire up a reprap > board. &by jbayless - General
Re: ATX power supply versus spend on a bench PSU - 13 years ago
I would suggest 3D-printing a safety cover for the high voltage terminals. That's what my team is planning to do.by jbayless - General
Re: Help support a High School RepRap club - 13 years ago
If you need to by a kit from a single supplier, have you considered an Ultimaker? To me, it seems like a better design.by jbayless - General
Re: Different axis configuration - 13 years ago
In a Bridgeport mill, the table moves in X, Y, and Z and the milling tool generally just moves in Z, although it can be set up to rotate I think. The Ultimaker uses a table that moves in Z and an extruder that moves in XY. Makerbot uses an XY table and the extruder moves in Z.by jbayless - Mechanics
Re: Flexible Coupling - 13 years ago
I'm surprised that in this whole thread you haven't posted the diameter of your motor's shaft, or which size of NEMA-XX motor it is. I'll assume that the shaft is 5 mm in diameter. If that's the case, I'd suggest using an M6 leadscrew instead of an M8 leadscrew, and then you can use a coupling nut such as McMaster-Carr 93355A100. You might have to drill out the inner diameter of some of the threby jbayless - Mechanics
Re: Internet censorship = No P2P exchange = No free speech = No more RepRap?? - 13 years ago
Can't you just share material that you own the copyright to, or is public domain, and in doing so avoid trouble? Or is the concern that they'll accuse you of violating their copyright even when they have no grounds for it, but you'll have to comply to avoid an expensive legal battle?by jbayless - General
Re: Reprap.org's current mininum website value is $3,136,875 - 13 years ago
GreenAtol Wrote: ------------------------------------------------------- > If this is true, we need to seriously look at > simply hopping to another domain name, and selling > this one with the requirement that a small note > always be present on the new page saying "looking > for the reprap project? click here". I don't think that it even can be sold. If it were, then once everyby jbayless - General
Re: RepRap detail quality? - 13 years ago
Second that. Top-quality reprap prints (and those of variants like ultimaker) are surpassing the quality of low-end commercial printers, and if you have your print done by a professional shop you may not get the kind of detail that you'd be able to achieve with a tuned reprap. I'm not sure they'll let you select an ultra-fine layer thickness, for example. If you have a 3D model in mind, you coulby jbayless - General
Re: no signs of life from ultimachine RAMPS board - 13 years ago
Can you upload a photo of your setup? Probably won't be able to spot any problems visually, but it can't hurt...by jbayless - RAMPS Electronics
Re: Power supply questions (considering 24 V) - 13 years ago
Wonderful, thank you!by jbayless - RAMPS Electronics
Power supply questions (considering 24 V) - 13 years ago
Hi everyone, I'm considering running my printer from a 24-volt power supply. Before I do so, my main concern is that the Arduino Mega is only rated up to a recommended 12 V, with 20 V being a hard limit. So I'd like to do this without frying my voltage regulators or damaging any components. I know that the Pololu steppers are rated up to 35 V. So I have a few questions: 1. Is it possible to ruby jbayless - RAMPS Electronics
Re: Heated bed: Wall Tile instead glass - 13 years ago
Perhaps a more suitable figure of merit is the thermal expansion coefficient divided by thermal conductivity, because a high thermal conductivity will reduce temperature gradients. Another point is that thermal stress can be avoided even when the thermal expansion coefficient is high, as long as the temperature is kept very uniform over the entire plate.by jbayless - General
Re: ULTIMAKER: Belts, Timing Pulleys & Bushing - 13 years ago
I also recommend Misumi.by jbayless - General