I am trying to find an answer for a particular question: There are a lot of calibration objects or sets on thingiverse, however the ones I've found are for changing variables in Skeinforge or Slicer. I am mostly working with Cura so I wanted to find a calibration kit for it but I am not able to. These slicers might have similar parameters but they are not exact matches, so most of the calibrationby drmaestro - Reprappers
The threaded rods are M8. I printed it at 0.2 mm layer height. Nozzle size is 0.4 mm.by drmaestro - Printing
Hi, I have a Z wobble problem, which I am trying to correct by realigning Z rods and using adequate couplings. This is the best print I've been able to make so far. I still have some issues and would like to have your input on how to correct it. 1) My first prints had a much worse Z wobbling issue, where the edges were not straight but wavy. I think I have managed to correct it to a certain degby drmaestro - Printing
I have checked the cables and they seem to be fine. However I can't turn the ramps (and Arduino) on if I also don't plug the USB. I have read somewhere that the USB input and the RAMPS' power input were regulated separately, so I assume there is a problem with the fuse maybe?by drmaestro - RAMPS Electronics
Hi, Yesterday I have turned on my printer fom its AC switch and saw that RAMPS wasn't working. If I plug the USB cable, everything is operational but without it there is no power going to Arduino. I normally didn't need to use the USB to power the unit on (to use with SD card). What could be the reason for this behaviour? (Note: I'll check to see if I have unplugged a cable, which could be a poby drmaestro - RAMPS Electronics
QuoteRalph.Hilton Can you provide a link to the website of the vendor please. The design looks to me to be inadequately braced to avoid X and Y wobble at the top of tall prints with fast movement of the extruder. Definitions of screws and bolts vary a lot. Vrheinen seems to be patronizing a little in asserting the rightness of his definitions. The basic definition I was given in school in Englaby drmaestro - Reprappers
QuoteDaveX I edited my text above to add: "You also could reduce the maximum power by (ETA reducing BANG_MAX or PID_MAX from 255 (see around ) depending on whether you want to limit the behavior on the way up into PID_FUNCTIONAL_RANGE or within the PID controller." Quotedrmaestro Here's an update on what I did: I've checked PID_FUNCTIONAL_RANGE and it was set at 10 as DaveX mentioned. I've sby drmaestro - Reprappers
I have uploaded a new blog entry on mounting the Y motor. It also has some information on timing belts. Here's the link:by drmaestro - Reprappers
Here's an update on what I did: I've checked PID_FUNCTIONAL_RANGE and it was set at 10 as DaveX mentioned. I've set it at 35. Tried to run the autotune which failed again (overshot by 35 degrees). So, I've tried to lower PID_MAX and BANG_MAX values to half of their original settings (original=255, set value=128). This helped a lot, as I have been able to run the autotune. It only overshot by 4-5by drmaestro - Reprappers
QuoteDaveX You using Marlin? And a heater cartridge? If you are using a cartridge and you are heating by 3-5C/sec near the operating point, which might be too much for the autotune. You also could reduce the maximum power by I think this overshoot could be because of a too-small PID_FUNCTIONAL_RANGE in Configuration.h The default is +/-10C per -- If you are overshooting by 35C, then I'dby drmaestro - Reprappers
Where is the power connector ground pin? Is it the second ground pin on the driver (the one on the right corner)?by drmaestro - Reprappers
I have ordered high temperature silicone to check your suggestion. As my thermistor was already installed in the hotend, I don't know where I have to apply it. Am I going to use it to cover the thermistor or just the part where the thermistor is joined by the electrical cable?by drmaestro - Reprappers
Hi, I was trying to check the voltage going through the stepper motor drivers (Pololus). The multimeter was set to read DC current , I've applied the positive probe to the trimpot and the negative probe to the second pin (one of the ground pins). I am sure that I didn't touch another pin but somehow I have seen a spark between the ground pin and the probe. I wasn't sure if that was important becby drmaestro - Reprappers
I am not sure if this is a thermistor problem. I have tried to manually change the P, I and D values (arbitrarily), but it always behaves in a similar manner. The temperature increases by 3-5 degree steps, overshoots by 25-30 degrees, cools down to the required temperature and stabilizes. If it was a thermistor problem, would it stabilize in the end?by drmaestro - Reprappers
Hi, Today, while talking to another reprapper I've learned an interesting fact that I have never paid attention to. When I raise the temperature of the hotend , it always overshoots (by 20-30 degrees Celsius) then arrives at the desired value. .I've always thought that this was normal. However my friend told me that it was an abnormal behaviour, the hotend shouldn't go past a few degrees more tby drmaestro - Reprappers
Hi, The web site for the printer is www.sigma3d.org . However the site is mostly in Turkish. You might be able to contact the designers through their e-mail if you want ([email protected]). Or if you want, I can ask them questions or forward your comments.by drmaestro - Reprappers
It may be wise to start with a smaller project, using a few DC motors and an Arduino Mega and programming it with the "processing" language to see if you can achieve the required precision for this type of project. There are tutorials on using DC motors with Arduino.by drmaestro - Reprappers
I'll try your suggestion. I have decided to cheat a little bit and painted it I think it looks better now.by drmaestro - Reprappers
What is the best test object for the extrusion multiplier? I just extrude a certain amount of filament and mark it and measure it by calipers. Is there a better method?by drmaestro - Reprappers
I have tried Kapton and had some good results. Howrver the hotend was too low and removed the tape when it hit the edge. My problem is the width of the tape I have, which is 4 cm. I need to lay down 5 pieces to cover the entire bed, which increases the risk of being removed by the hotend. I have ordered a 20 cm wide tape roll, so we'll see if it is a better solution.by drmaestro - Reprappers
Hi, I have finished building my 3D printer and after struggling for a few days I've been able to print my first non-calibration related object: Yoda The original object was larger, I've shrunk it down to print faster. It measures 4,8 cm ear-to-ear. I've printed with 1.75 mm ABS, hotend is 220 degrees and the heated bed is 95 degrees. As you can see there are some problems. The first problem iby drmaestro - Reprappers
Hello, I have added a blog entry on motors used in the project. Here's the link:by drmaestro - Reprappers
Hello all, I have added a section on how to assemble the Z rods and Y rods. Here's the link: http://www.3dprinterblog.org/2014/05/lets-build-it-z-and-y-rods.htmlby drmaestro - Reprappers
Hi everybody, I have added a new section about metal rods, bearings and threaded rods. Here's the link I hope you'll enjoy it.by drmaestro - Reprappers
The endstops allow the printer to be aware of the position of the printing head. If an endstop is triggered, it means that the head has reached a limit and shouldn't go further in this direction. Without endstops, the printer wouldn't be able to prevent accidents (hitting its components)by drmaestro - Reprappers
Hello, I have added the section on the plastic parts of the printer. It also has the schematics, so you can have an idea on the final product. Here's the linkby drmaestro - Reprappers
IHi everybody. I have added the section on how to build the main frame (or the skeleton) of the printer.Here's the link:by drmaestro - Reprappers
Hi vreihen, Thank you for the encouragement. I'll try to document the entire process, which I think is a great learnig experience and maybe a tale of discovery for a newbie. Also, thanks for the valuable input. The first picture you have posted demonstrates that this is indeed a complicated matter. I have read the wikipedia article on screws, and alos on bolts. ) This is what I understand, inby drmaestro - Reprappers
Hello, I wanted to introduce myself and my blog about 3d printing. I am very enthousiastic about all things 3D and wanted to buy a printer for a long time. There are a lot of open sourced or commercial models around but I wanted to buy one form a local vendor, as I thought I'd need lots of technical support. I opted in buying a kit instead of a competed model, as I read that's a better way to leby drmaestro - Reprappers