OK, forget what I said about acceleration. I just had an 8 hour print ruined overnight by 'the shift'. I'm thinking Sunny might be right here. I had an extruder problem and the fix was just a *bit* more current on the polulu driver pot. I have the X and Y set to about .333 volts and the Z is at about .66 volts (two motors in parallel). The E had been at .25 but that wasn't enough so I bumpeby a_shorething - General Mendel Topics
I had a similar problem with my setup. Do a search on here about 'shift' and you'll find a few suggestions. For me the solution was to go into the configuration.h portion of my firmware and dial back the 'acceleration' and 'jerk' settings. Here's the section of code that appears to be working for me: (I started at 5k for each of X, Y and now it's set at 600. Good luck! //--------------------by a_shorething - General Mendel Topics
misan Wrote: ------------------------------------------------------- > Try reducing max acceleration on Y axis to 1000 > mm/s^2. This is the answer! I had the same problem on mine and this was the answer: acceleration and jerk. I don't think it's a hardware issue, at least mine wasn't and when I did the research I found others had fixed it the same way. Do a search on here about 'shby a_shorething - General
I was lucky, after the very first hiccup (I ordered the day they changed their website to include a 'same day shipping' ad, but I didn't hear anything from them for several days) and that prompted me to look on here. I wish I had checked here before that but it was in time to get the transaction cancelled after only a couple of weeks and more than half a dozen e-mails where they tried to placateby a_shorething - General
heh heh. Nice. I think I need to update my files. I didn't think more than 3 decimal places would make a noticeable difference, but I will defer to the software engineer every time.by a_shorething - General Mendel Topics
For the Z-axis you may have to alter the steps in your configuration.h I used Josef Prusa's calculator website Then I went into my configuration.h file in the arduino .pde file and found this part: //// Calibration variables // X, Y, Z, E steps per unit - Metric Prusa Mendel with Wade extruder: #define _AXIS_STEP_PER_UNIT {80, 80, 3200/1.25,700} Then I commented out the second line and made tby a_shorething - General Mendel Topics
I absolutely love the ability to save the different settings for each portion (print, filament and printer) separately and access them from pull-down menus. I was saving all of my calibration tests under different config files but this is MUCH easier and more intuitive. I didn't notice the 'mouse-over' help/description in the previous version either (may have been there) but that's a great featby a_shorething - General
Thanks Traumflug, I didn't know that and was a bit put off at using a 'no longer supported' version of the Arduino software in order to use my brand new Ramps 1.4.by a_shorething - General Mendel Topics
I just did the same setup and here's what worked for me: First: Need to load the get the Arduino programmed with firmware. Step 1: Get Arduino software. I got a setup for 'sprinter' from the Ramps Reprap Wiki site that worked for this. THIS ONLY WORKS WITH ARDUINO VERSION 23!!! Not the most recent version which is 1.01 I think. This was my first issue. Once you install the version 23 ofby a_shorething - General Mendel Topics
I had problems with mine when I first set it up (last week) during calibration. It would track fine and step off 5 or 6 10mm steps at a time and then jump ahead, or miss a few in a row. When I swapped the driver boards around the problem moved, so for me it was the drivers (Ramps 1.4 with Pololu driver boards) and I had to reflow the solder on the pins of two of them. Even under a magnifyingby a_shorething - General Mendel Topics
@Newperfection Thanks, I'll check again for any damage, but you mention a thermocouple and as sublime says, I'm using a thermistor from the J-head hot end kit. Maybe that's the issue. @sublime OK, that's interesting. Thanks, I'll check that out. EDIT: I used the sprinter code that is part of the RAMPS wiki and it looks like it may be working. I tested the hotend and bed so far, motors next.by a_shorething - RAMPS Electronics
Using Marlin Firmware, just got it talking (by changing to version 23 of Arduino software and changing the Pronterface baud to 250000). When I connect it says: ************************************************************************* Connecting... start Printer is now online. echo: External Reset Marlin 1.0.0 RC2 echo: Last Updated: 2012-05-02 | Author: erik echo: Free Memory: 5609 PlannerBuffby a_shorething - RAMPS Electronics
SWEET! I just compiled sprinter.pde without errors using version 23. Looks like I'll have to have two different versions and switch back and forth until a future version of Arduino can handle the Ramps shield for the Mega. Thanks for your help!!!by a_shorething - RAMPS Electronics
Thanks, I'll try 23. The website for Arduino says that's one of the 'no longer supported IDEs', but I guess that doesn't matter? If that's the most recent version prior to 1.01 and it should compile, that's good enough for me. Thanks, I'll post again shortly.by a_shorething - RAMPS Electronics
Oh, really? I wasn't aware of that. I have 1.01 of the Arduino software. I'll try the downlevel version. Thanks! EDIT: I Just checked and I can't find 0027 on the Arduino site, only up to 0023 and then 1.01. Any idea where I can get 0027?by a_shorething - RAMPS Electronics
Thanks. I have it set for Mega 2560 or Mega ADK. I think the board that the RAMPS kit comes with is the 2560.by a_shorething - RAMPS Electronics
Hey all, I'm so close!!! I got my Ramps 1.4 wired up and I'm ready to try testing it but I'm getting errors when I try to compile just the generic default versions of the two .pde files I got to upload to the Arduino Mega board with the Ramps shield. Detail: I've installed the Arduino software (and have tested it in the past with a few sketches on an 'uno' board to get the hang of how it workby a_shorething - RAMPS Electronics
Sweet! Thanks. I got it from Makerfarm but the kit is packaged by Ultimachine. The instructions on the site basically said to check with the RepRap wiki write-up for the Ramps 1.4. Thanks again!by a_shorething - RAMPS Electronics
Cool! Is that the one that's vertically oriented next to the heat bed terminal (Q3?) And thanks for the quick response! Did I miss it in the documentation somewhere or is this a recent addition to the kit?by a_shorething - RAMPS Electronics
Hello, I'm working on a RAMPS 1.4 DIY kit and I've worked through all of the steps on the WIKI but I can't find any reference to the heat sink that is in the bag labeled RAMPS DIY KIT "C". The bag had all three of the Mosfets in there, the diodes (1N4004) for D1 and D2 I think, and this 1 large heat sink plus the nut and bolt to mount it. I've installed the little tiny heat sinks on the driveby a_shorething - RAMPS Electronics
Very cool. Thanks to both of you. I love the look of this design. As I think about it more than half of the parts need to be sourced online anyway, so it makes sense to order the rails too, especially if you can get them cut to length. I can't wait to get my current printer going so I can start on my next one.by a_shorething - General Mendel Topics
That looks really nice, very sturdy. Something about all the threaded rods in the standard Prusa Mendel makes it look like an erector set even though it's very functional and sturdy. The aluminum frame on this one just makes it look more 'finished'. Any idea about the difference in weight and availability of these aluminum pieces? Threaded rod and nuts are available pretty much everywhere, I'by a_shorething - General Mendel Topics
In case anyone is interested or would like to chime in with advice and/or criticism I'm blogging the build of my first 3D printer. It's a Prusa Mendel V2 with Ramps V1.4. The name of the blog is: itsa3dworld.blogspot.com. Let me know what you think...(and be kind, it's my first blog and my first 3D printer. ).by a_shorething - General Mendel Topics
Dad911 Wrote: ------------------------------------------------------- > I backed it. So far I have received timely > updates, great communications, and in one of the > emails, Chelsea even provided a list of 'extra' > items that will be included, like Kapton tape & > insulation. I get emails about once a week, since > I backed it. > > 2 hot-ends, 2 extruders, 2 stepby a_shorething - General
Interesting thread title. Maybe it is "Not another 3D printer company". Seriously? No pics or video. Come on QU-BD. Give us something...by a_shorething - General
Good deal! Let us know how it turns out. I got my kit from MakerFarm the other day and I'm building it too. (Just did the RAMPS kit last night, I only had a few extra parts. ).by a_shorething - General
For the ejection feature you'd also have to figure out how to set up the printer to do more than one print in a row by looping or batching up jobs. Interesting idea though.by a_shorething - General
Maybe you could design a gear that has vents and cools itself as it spins, kind of like the brakes on a car? ..or possibly a gear that is assembled from several parts that would increase the strength? Kind of like building it out of glued and/or keyed wedges so that their's more strength where it's needed? Definitely not as easy as using a suitable material, but it would be an interesting prby a_shorething - General
There is a very detailed set of build instructions on the Maker Farm website that lists the lengths of each rod you'll need (in metric and SAE) as well as all of the other stuff that isn't part of the kit but is required.by a_shorething - General
Seriously. Tell them I said hi! I ordered from Makerfarm online Saturday and got the shipping information this afternoon, it's on its way already. (yay).by a_shorething - General