Quoteo_lampe OK, I expected NO switches, because IMHO that´s the common case.If NO is common, so is NC. NC are generally recommended because if a switch should fail open, or a wire becomes disconnected, it will be seen as tripped and movement halted. A NO switch will appear the same whether it's connected or not, creating the potential for bad things to happen.by cdru - RAMPS Electronics
Set screw for locking the heater block in place on the threaded tube?by cdru - General
18AWG or large for the hot end presuming 12V and <= 40 watts leaving a significant safety margin. You could go smaller if you really had to. Pretty much anything for the endstops and fans since they are so low current...I used some old solid cat5 cable for the individual conductors. Motors depend on the current what you can get away with but 22AWG is typical for NEMA 17 sized motors and 18AWGby cdru - General
What you see as the "beam width" is actually the laser moving back and forth very rapidly within that strip. Why it takes multiple passes instead of scanning the entire layer as a single pass I don't know. It may be due to the design of that printer. From the tech specs of that printer, beam has a focus diameter of 100 μm (0.004 in) and a scan speed of up to 7.0 m/s (23 ft./sec). Using a focus dby cdru - General
Reduce mass or increase power (which means increase voltage and/or current)by cdru - General
If optical transparency and aesthetics isn't a secondary goal, go down to your local home improvement store and pick up a piece of XPS foam board insulation. You're R-value will go up and your cost will go down. Even twinwall polycarbonate sheets would be cheaper and give you additional light transmittance through it. Twinwall usually gets used as greenhouse glazing instead of glass. Locally Iby cdru - General
Quoteo_lampe Did you say, you want to extent the cables for the E3Dv6? Than you might look for a pair of thicker wire than 22AWG or the hotend will stay too"cold". I´m not familiar with these AWG sizes, probably some US-reprapper can tell?22 AWG is perfectly fine for a hot end as it's rated, at least by NEC (National Electric Code), for 7 amps for chassis wiring. If you're drawing 7+ amps for yoby cdru - General
They've been tried. Search the forum for igus or drylin. Sometimes they are referred to as being bushings instead of bearings as well. It comes down to cost. A standard LM8UU bearing is 1/10th the price of a Igus Drylin bearing.by cdru - General
What is your application? Must they be 624uu bearings or can they be other dimensions but still have a inner diameter of 4mm? And is your aversion to using Chinese due to quality or xenophobic?by cdru - General
QuoteFalloutBe - One bearing on each end of the screw, with nuts on the screw that push the two bearings apart. (like this example) This is referred to as a supported mount. Quote- Two bearings on one side with nuts that push the bearings together. (like this), and an additional bearing on the other end, just to keep the rod in place. (in this second example, ignore the motor. In my case it'lby cdru - Mechanics
Quoteo_lampeI have disassambled a few CD-Roms and 5.25 floppy drives myself, but never found stepper motors? Most CD/DVD-ROMs I've torn apart have used 4-wire bipolar stepper motors for positioning of the read heads, not the spinning of the discs. QuoteI found many steppers in old copymachines and laserprinters, but they usually can´t do microstepping. I'd be curious to know why. Both bipolaby cdru - RAMPS Electronics
QuoteFalloutBe I also need some kind of bearing, which can rotate but keeps the lead screw from moving up or down. I have no idea how this kind of bearing is called, can someone tell me please? ^^A standard bearing like a 608 can handle radial as well as some axial forces. As long as you abuse the bearings and limit the axial forces, you shouldn't have a problem with them. There are better beariby cdru - Mechanics
QuoteTraumflugFor example, step losses simply don't happen because it follows the laws of physics precisely. Damn all those firmwares that break the laws of physics!by cdru - General
Quotecristian If we ignore microstepping (for example if microsteps are not too precise), it seems to me that the X/Y resolution is definitely too low unless one is printing with 0.8mm or bigger nozzle. On the other hand, Z resolution is far too high unless one wants to print at very very low layer height. If we consider microstepping, then Z resolution is just wasted.Cost, speed, resolution. Piby cdru - General
Stepper motor ratings are determined by current, not voltage. The "rated" voltage is calculated by the resistance and current rating of the stepper, which should be listed on the spec sheet for the stepper if you can find it and normally can be exceeded for better performance.by cdru - RAMPS Electronics
Searching for "gear" on thingiverse returns over 6000 results. If you also go to Explore, Things, then sort by Popular or Featured, there are many excellent designs. If you still can't find something, you're not trying very hard.by cdru - Printing
QuotejessicabrennerBut, maybe I could do the slicing on my own computer, then just send the gcode over the internet to the printer.That's exactly what I do.by cdru - General
Quoteleadinglights When I look on this forum now, much of what I see is bombastic and opinionated. There are some gems of wisdom in some replies, but it takes a lot of searching to find them in the general detritus. That's actually great news. Reprap finally has been accepted as mainstream and now is just like every other user group out there! Almost every forum or online group I've ever visitedby cdru - General
Or the other option is to replace the mosfet with a better one that doesn't need active cooling to survive.by cdru - RAMPS Electronics
QuotejessicabrennerDoes anyone know if any of these CANNOT do this? OctoPrint says it can.I can confirm that OctoPrint can do all of those things. While OctoPrint can slice using the Cura engine (and possibly others?) if you like to tweak slicing settings for individual prints I think you'll be disappointed since the configuration is file-based. If you set it and forget it with slicer settings, tby cdru - General
QuoteFalloutBe I really thought that, putting that single rod at one side of the bed, is bad. I can't imagine how the bed would be well secured like that, but I can't say that it is not possible because I never felt how strong such a design is. You say it has been succesful.Look at a Makerbot Replicator or Ultimaker printer. They have a single leadscrew on the back edge with a cantilevered buildby cdru - Mechanics
QuoteFalloutBeWhich Z axis design is, in your opinion, most accurate, and thin in heightThe one that doesn't move. You basically have discovered the drawback of that type of design. The successful printers that have implemented a bed that moves in the z-axis I think have done so with a single threaded rod/lead screw. As soon as you add more screws to the design, things get more and more compliby cdru - Mechanics
QuoteFloydThe hair spray on the other hand goes on real thin and I can get 10-20 prints easy before a clean.The part that is unappealing to me about hairspray is the overspray leaving a sticky residue over the print frame (or surrounding area if you remove the build plate)by cdru - General
I've had great luck with purple glue stick. Put a thin layer on every couple of prints or as needed keeps it fresh, and if it builds up a little too much just wash it of with water and start over. Parts usually just pop right off when cooled down to room temperature. No aceton smell. No real mess. No problems.by cdru - General
The formula I like best come's from Nophead's build manual for the Mendel90. The forumla is: E_STEPS_PER_MM = ((# Steps per revolution * # teeth large gear)/(# teeth small gear * effective hobbed bolt diameter * pi)) For example, if I had a standard 200 step motor running at 1/16th microstepping, that's 3200 steps per revolution. A common Wade's gear extruder ratio is 39:11. A 8mm hobbed boby cdru - RAMPS Electronics
Quotenasone32 what do you people think?I think you're going to be in for a big surprise. People have dedicated their (RepRap) lives to building a better extruder|hot end|printer|heat bed|whatever. Not saying that you can't make improvements. Just that your giant step ideas/goals are a lot harder to make rather than many baby step incremental improvements. Start making prototypes and I think you'by cdru - General
How do you have your 5VSB (red wire) wired to your ramps board?by cdru - RAMPS Electronics
Have you checked for loose pins and connectors? Have you checked voltage between the blue wire and ground to see if it's being held high, sagging, or dropping out completely?by cdru - RAMPS Electronics