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Re: Quieter hotend cooling fans? - 7 years ago
Fans are fans, the sizes and connectors are all standard. If you want something quiet just hop over to Amazon or Newegg and grab one. I put a very quiet 40mm fan on my Chimera, if you go up a fan size cooling will not be a problem - even the quietest 40mm fan moves much more air than a loud 30mm fan. Quiet blower fans are harder to come across, I think the only option there is scaling down tby 691175002 - Reprappers
Re: Functionalities for a complex CNC controller - 7 years ago
I've always had a suspicion that at some point jumping to LinuxCNC becomes a good choice. It certainly has the ability to perform every task required for 3d printing (plus an endless number of additional features) but I'm not sure if anyone has wrapped them into familiar g-codes yet.by 691175002 - General
Re: auto-print with just a "start" button? - 7 years ago
You can configure smoothie to have a physical switch (io pin) play a g-code file. You might want to confirm that it will work on their discussion group first though, I've found that switch is reliable with simple commands but can sometimes behave unexpectedly. For example I'm not sure what would happen if the button were to be pressed while a print is ongoing. The other option is have anby 691175002 - General
Re: Woes of ABS and part warping - 7 years ago
I know you can change basic settings like extruder and bed temperature on a per-filament basis, but I haven't seen an option to scale the STL per-material. My enclosure is a glued/taped monstrosity made from 3/4" insulation foam and will hit ~60c with just the bed and extruder if left closed and unattended for several hours. I intend to include some means of controlling the chamber temperatureby 691175002 - Reprappers
Re: Woes of ABS and part warping - 7 years ago
I print almost exclusively ABS. With the brands I've been using the build chamber must be >45c and <50c. I have a vent at the top of my enclosure that is partially blocked by a piece of cardboard. I leave a multimeter thermocouple in the chamber and open/close the vent to adjust temperature. In my experience there is really no way to reliably print ABS if the chamber is <45c. I usedby 691175002 - Reprappers
Re: nozzle filament output temperature - 7 years ago
I was thinking of these products, other companies produce analogues as well. For what its worth, you generally put the metal in front if you are describing the coating, and afterwords if you are describing the base metal.by 691175002 - General
Re: nozzle filament output temperature - 7 years ago
I don't think you need to get too fancy. You can switch to a plated copper block and nozzle with currently available parts, and that will behave similarly to moving the heater and sensor closer to the nozzle. Its possible that combining the nozzle and heat-block into a single component would make the nozzle respond even faster, but that comes with major disadvantages. If you tune your PID withby 691175002 - General
Re: Looking for a specific alternative to Mic-6 bed plate, requirements listed. - 7 years ago
Quoteklcjr89I have ordered the 1/4" thick precision ground Garolite, which will be a 1.32 lb weight reduction over Mic-6 of the same thickness. The flatness tolerance is equivalent to Mic-6. Where are you seeing a flatness tolerance? The McMaster page only shows thickness, although I'm sure flatness will be quite good.by 691175002 - General
Re: What are the considerations should be cared for when building a large 3d printer - 7 years ago
A 100c chamber will severely limit what you can keep in the hot zone. I don't know of any hobby builds that completely separate all electromechanical components from the build chamber. I think you will need to start borrowing from Stratasys designs. Holding a 2'x2'x3' volume of air at 100c for days at a time will dump a ridiculous amount of heat into the surrounding environment unless its wellby 691175002 - General
Re: Looking for a specific alternative to Mic-6 bed plate, requirements listed. - 7 years ago
I would recommend carbon fiber or fiberglass plate, but I think you will have a very hard time getting alternative materials that are as flat as MIC6. If you probe the bed flatness isn't as critical as repeatability anyways. You can drill composites with carbide bits and a lot of water but in general its probably easier to epoxy components to the bottom of the plate. I think CF has reasonableby 691175002 - General
Re: Experiences with building and using the E3D Titan extruder (Bowden) - 7 years ago
I just picked up a standard and mirrored titan for my build. It is a very clever design, and they have gone to extreme lengths to keep it compact. As you noted, one of the mounting screws runs through the drive gear shaft; the idler pivots on the motor shaft and slides against the gear as well. After seeing a genuine Titan I would be cautious with off-brand clones. E3D uses lubricant-impregnaby 691175002 - Reprappers
Re: A challenge? - 7 years ago
Micro drill bits are almost always carbide. I don't think drilling is a practical way to remove blockages from a tungsten nozzle, heat is probably the best bet.by 691175002 - General
Re: Help with cable chain for coreXY D-Bot - 7 years ago
I've found that there is an enormous difference in quality between name-brand and chinese cable chain, so if your experiences are with ebay/aliexpress stuff maybe give Igus a try. Plotters sometimes use a two bar linkage for cable management as well. You might be able to print something with a bearing for very low friction.by 691175002 - CoreXY Machines
Re: Software axis orthogonality compensation in Marlin? - 7 years ago
In industry, software calibration is generally reserved for machines that are already approaching the limits of attainable mechanical accuracy. This is for a few reasons. The first problem is that errors on a cheap machine are unlikely to be linear. Squareness errors in a hobby printer are probably accompanied by twisting and bending, which makes it very hard to get useful calibration data viaby 691175002 - General
Re: If you could get any part AT COST - What would you want? - 7 years ago
I think you could sell like two or three precut lengths of linear rail and cover 90% of hobbyist needs, but I'm not sure you can undercut Chinese aliexpress sellers on price. Motion components are dirt cheap from China and you can get almost complete customization if you message the right seller. A high end control boards would be a good candidate since scale would bring down the price quite aby 691175002 - Reprappers
Re: Detailed questions regarding gcode (federate, acceleration, jerk) - 7 years ago
I'm not an expert on this issue, but my understanding of G1 feedates is that they only apply to the cartesian axes unless the move is an extruder-only move. The following commands will execute in the same amount of time because the E travel is ignored when calculating the speed of a carteisan move. G1 X10Y10 E1 F500 G1 X10Y10 E10 F500 Under this interpretation, the following G-code: QuoteG1 Xby 691175002 - General
Re: Detailed questions regarding gcode (federate, acceleration, jerk) - 7 years ago
QuoteIn the wiki the S refers to 'normal moves' and a T to filament only moves. What are filament only moves? Segments where only the filament moves, such as a retract or prime. QuoteIs the max value used for all moves?? The max value is available for any move, but might not be necessary. For example if one long straight line is segmented into two G1 commands you do not need any accel/jerk toby 691175002 - General
Re: Problems generating/interpreting G code correctly. - 7 years ago
The G02/G03 arc commands originated back when most G-code programs were being written by hand. There are two different ways to calculate the control point coordinates so you have to make sure the firmware and CAM/Post are on the same page. ( ) Modern CAM generally segments all curves into lines and does not produce any arcs at all. Computer generated tool-paths are often too complex to be repby 691175002 - CoreXY Machines
Re: 3-axis closed loop motion control - 7 years ago
You can use $8 digital calipers as linear encoders. Most models have serial ports accessible via the battery compartment, although you might want to directly tap the quadrature signals for faster updates. I highly doubt that stepper motors are limiting print quality in hobby FDM. Stepper motors are by far the best performing option for their cost, which is why they are used everywhere.by 691175002 - General
Re: Control the heatbed with a relay
- 7 years ago
If you would prefer not to use a Chinese board and are running 24VDC you might want to consider the SSR6M12-DC-200D. The only issue is it has a minumum 3.5V control voltage which is above the 3.3V gpio voltage of some controllers. The datasheet worst-case voltage drop is 2.8V at 40A, but it is a true MOSFET and presents a resistive load so in practice very little heat is generated. I wouldn'tby 691175002 - General
Re: Rotary Delta Robot Design Considerations - 7 years ago
In a low speed application gravity will probably preload the arms, so backlash can be ignored. That being the case, pretty much any thing will work fairly well if you can get enough reduction. I'd be inclined towards belts because they perform well and usable pulleys are easy to print, whereas if you don't hit a gears dimensions bang-on their performance will be highly degraded. Direct use ofby 691175002 - Mechanics
Re: Feedrate, Acceleration, and Max Speed. - 7 years ago
If you want to perfectly trace the desired toolpath the machine must come to a full stop at every corner; and if you want to maintain maximum speed the machine will be unable to accurately follow the toolpath. Proper motion controllers solve this by allowing you to choose how much to "round" off the toolpath. You specify an allowable toolpath deviation and the controller will run as smoothly anby 691175002 - General
Re: CoreXYU -> CoreXYE - 7 years ago
I think the most straightforward way to do this would be to run a standard H-Bot or CoreXY path on top of the regular one. Mentally replace the motor in this picture with your extruder, I just drew on top of something from google. It wouldn't be hard to make the belt-driven E axis present the same shaft/hole pattern as a Nema17 stepper, allowing the use of regular extruder/hotends. Technicaby 691175002 - General
Re: CoreXYU -> CoreXYE - 7 years ago
It would definitely be possible, and would probably work very well. My main concern is that you are adding a lot of complexity to the design to move only 200g off the carriage (maybe even less if you net out the weight of all the additional moving components). You have to weigh the cost/benefit of a fixed extruder motor vs the cost/benefit of making the frame and linear guides more rigid. Itsby 691175002 - General
Re: MiniM's Core XY project - 7 years ago
Larger machine shops really don't want to do that kind of work and mark it up accordingly. Its risky to do business with hobbyists because sometimes they don't actually know what they need. Everyone eventually runs into a clown who asks for a 1" shaft (no tolerance) and then refuses to pay because it doesn't fit the 25mm bearing. Its just too much potential headache for a job that might net $20by 691175002 - CoreXY Machines
Re: My first Servo motor based 3d printer - 7 years ago
QuoteBrad331 Pardon me for replying to an inactive thread, but how did you get the Smoothieboard to communicate with the AC servo drive? Almost every servo drive can be configured to take step/dir input, so the system is more or less equivalent to a setup using external stepper drivers. It can get more complicated if you want to report fault conditions back to the smoothie board or pass throughby 691175002 - Extruded Aluminum Frames
Re: NF hotend - 7 years ago
I purchased one of the 2 in 1 out versions but probably won't get around to powering it for a month or two. It looks very well made - surface finishes and edge breaks are very good, and filament slides through the Y very reliably. The only surprise is that the entire path (including heat break) is Teflon lined which limits it to lower temperature filament. I expect it to work quite well as Tefby 691175002 - General
Re: CoreXY design flaw spotted, EdgeXY concept fixes it, comments and review of analysis appreciated - 7 years ago
QuoteOrigamibAs usual though this needs some experimental evidence... Would a similar CoreXY and a standard Cartesian machine have similar amounts of deflection? It depends too much on implementation, even saying the machines are similar leaves a lot open to interpretation. The only real constant is that CoreXY will have better acceleration because the gantry can be lighter and does not need toby 691175002 - CoreXY Machines
Re: CoreXY design flaw spotted, EdgeXY concept fixes it, comments and review of analysis appreciated - 7 years ago
QuoteI do understand this, but is it a problem? Surely each pulley will only deflect by x amount (lets say 20 microns) in a certain direction due to the tension in the belt system. It will not move in the other direction and so won't add positional errors. If you assume the system is under tension to begin with the pulleys will be at some intermediate level of deflection at rest, and will therefby 691175002 - CoreXY Machines
Re: CoreXY design flaw spotted, EdgeXY concept fixes it, comments and review of analysis appreciated - 7 years ago
QuotelkclThe design flaw stems from the fact that the X-Gantry is free to rotate, with only the mechanical strength of the rails/rods and the attachment of the X-Gantry to those rails/rods being the sole method of stopping any such potential rotation. [...] Can anyone spot a mistake in either the Edge-XY analysis *or* the CoreXY analysis? I haven't fully analyzed your posts, but the CoreXY desby 691175002 - CoreXY Machines