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14

There are three main options here for Mendel style ZX gantries: One Z screw and motor, which is similar to a cantilevered design but somewhat more stable because of the opposite smooth rod Two Z screws and two motors Two Z screws and one motor, with belt synchronization of the two sides Of all of these, running two screws off one motor is clearly superior ...


12

The four main motor speed limits in a 3d printer are: Firmware step generation frequency limits Firmware motion planner effects Loss of torque and precision due to motor coil inductance and back-EMF effects Mid-band resonance Step generation rate limits will depend on the firmware and controller board used. There is a significant range, particularly when ...


8

I would say it's not the best approach. In the situation you've described I would rather install some kind of vertical ring a bit above your printer. This ring would organize your filament going from any direction. So let's assume you got one spool on the right and one on the left of your printer, both are 1m away from the printer itself. If you get ...


6

I think it's a reference to a tolerance. Look at this ISO table. This States that the nominal diameter of 3mm is held to a tolerance of +-0.004mm. @DarthPixel provided some great links identifying the term interference fit (or press fit as I've heard locally) as described here. Also, here is a better link providing examples of how the tolerance works and ...


5

Did you heat the hotend before attempting to move the extruder? Most firmwares block cold extrusion. If you send the printer M302 it will allow the extruder motor to move without the hotend being above the temperature set in the firmware. Jumpers next to drivers are used to set microstepping, no need to adjust these unless you changed to a different type ...


5

Have a look at the image provided in this seller's part description. it probably says more than my words could (which would also only rely on images - your parts just looked like I saw them somewhere before). 3D printer parts right hand Bowden Extruder kit set no motor compact extruder aluminum alloy for


5

This is somewhat similar to a question I asked a while back. Pay attention to Ryan Carlyle's response in the question I posted. His post essentially explains various ways that guide tubes may hinder extrusion due to drag. In regards to the length of your guide tubes, ensure that the tube is relatively straight. If you are holding the filament above the ...


5

I would change the pin assignments by swapping E0 and E1 in pins_RAMPS.h.


5

The hot end can clog in two places. Heat distortion can cause the filament above the nozzle, at the level of the cooling fins, to melt, expand and prevent further passage. The nozzle itself may be clogged by impurities. There are two methods available, depending on the type of clogging. If the hot end is blocked at the level of the cooling fins, a so-...


5

The question is if robots classification terminology the textbook sketches applies to 3D printing? Servos (closed loop) are used in robots to guarantee position (you don't want to accumulate an error after repetitive movement), most 3D printers use open loop steppers that are instructed on a point to point basis through G-code instructions, implying that ...


5

Many of the motors that look like stepper motors in laser printers are actually three-phase brush-less DC motors. These look like stepper motors, but are intended to be used differently, controlled differently, and serve a different function. Like stepper motors, they have a permanent magnet rotor surrounded by coils of wire. They typically are used in ...


4

As a quick and dirty solution you may try to enable two extruders in configuration file, re-upload firmware, and then edit your GCODE file to replace all E0 references with E1.


4

I would like to add to the already great discussion, that this general approach is prone to filament degradation by water intake. That is, if you are using filament for which this is an issue (PLA as the most prominent example). Also, your goal is to exchange more quickly, that is without (un-)mounting whole spools each time. Basically you want to have a ...


4

According to the description, the drive gear you have has a 10.8mm diameter. This means that (in the ideal case) one full rotation of the drive gear will advance a length of filament equal to its circumference, which is pi x 10.8mm or approximately 33.93mm. Your motor rotates 1.8 degrees per step, so it takes 360 / 1.8 = 200 steps for a full rotation. Since ...


4

I just had this same problem and my solution was to push the motor as close as I could up to where the screw goes, because they weren’t lined up. I hope that helped.


4

Unfortunately you're going to have to tear the extruder head apart and clean the nozzle. There are kits like the following (found on Amazon - No affiliation): This will give you everything you need to clear the nozzle. The only other solution is to replace the nozzle and extruder tube. The filament is stuck in either or both of these parts. (As an aside .....


4

There are several sources of PCB "etching" bits. They tend to be single straight flutes and high angle, very pointy bits. For the motor, high speed is good. Look for 30k+ RPM. The main thing to be concerned about is the amount of runout, or wobble in the tip. With a tiny tip, you can't afford much runout at all. It will broaden the gap you are cutting ...


4

At Hyrel, where I work, we use a 12 VDC, 3.5 A, 40 W spindle tool with 1/4" chuck and 3,000 rpm max (without load) to make prototype circuit boards by machining through the copper layer to make isolation traces.


3

The maximum operating temperature can be found in the specifications of your steppers. Usually the ambient temperature operating conditions are limited to 50 °C with a maximum operating temperature in the range of 70 - 100 °C. For instance, the steppers I use are limited to a temperature of 80 °C. It is however advised to keep this temperature ...


3

What you're seeing there is commonly referred to as "salmon skin" and isn't a result of the motor stepping, but due to power backfeeding from the motors. Install a set of flyback diodes on each axis (you can buy these premade specifically for printer motors, normally in sets of 8 diodes per motor) and you should find the issue either minimised or eliminated ...


3

Delta bots always need all motors to step to maintain a straight level. Microstepping, is not magic, the incremental torque decreases per step so that you will be more likely to miss a few micro-steps. Furthermore, the signal that creates voltages for the micro-step positioning is usually not perfectly sinusoidal (pulse-width voltage modulation is used to ...


3

If the printer is in absolute positioning mode (which is used almost exclusively), then the extruder will either wind back or wind forward to the last 5mm point. Effectively, the firmware treats the extruder like any other axis, and you can set the origin whenever and wherever you like (it doesn't have to be the home position). Use G92 to reset the extruder ...


3

As far as I can see on the attached videos your homing movement is reversed. as per Marlin, the homing for X shall move towards the left side and for Y to the back of the printer. That could occur when: cable connectors to stepper motors are reversed, or the motor is assembled the other way (you can set reverse direction in Marlin) The other issue is steps/...


3

Awful answer, I know, but it depends... on where you are going to employ them: are they are all, or just some, of the axes, or; just for the extruder? If they are for use in translating movement of the axes, then the weights of: the y-axis plate; the x-axis carriage, and; the print head, will all come into play - amongst many other things. With a torque ...


3

Some info on the subject: few stepper motors have any way of knowing their exact position during operation, which means Marlin will have to assume the steppers always are in the right place. In other words, all g-code commands are executed relative to their current position, not with regards to the real positions. So if you forcefully move the printhead ...


3

Yes, this is feasible. You should constrain the tube at both ends, this prevents the spool from pulling up on the extruder. This approach is known as reverse bowden setup.


3

This is a NEMA 17 motor. It is virtually identical to the NEMA 17 motors Creality uses in most of their 12V products. In contrast to other companies, Creality uses a different connector with a flat ribbon cable instead of color-coded wires. The upper line of the label identifies it more clearly: JD Identifies the factory/manufacturer 42 identifies the ...


3

Before any axis can move the printer must be homed correctly (G28 command, or an equivalent home button, there are 2: an X/Y and a Z button). A correct printer profile must also be defined; this profile contains some bed geometry and speed data, these are some basic values that are easy to add through the wrench button and "printer profiles" menu item. Note ...


3

The 3.8 V rating does not mean what you think it does. "Rated voltage" has a very specific technical meaning. For a 3D stepper motor to work properly, the rated voltage of the stepper motors actually needs to be significantly lower than the supply voltage of the stepper drivers. These steppers are perfectly compatible with a standard 12V RAMPS setup ...


2

First up: I'm no expert. All of the below is guesswork. I think that the main reason is that it makes for a simpler design. If you hold the X-Axis only on one side, you have to keep it level through rigidity. (Especially if you have the extruder motor on that axis.) If you try to control the sagging, you have a problem because the torque changes depending ...


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