NEMA 17 Stepper w/ T2.5 Pulley, Drop Ship Worldwide. (no replies)

March 29, 2013, 1:25 am

≫ Next: problem with hammering noise in stepper motor and not moving X-axis (5 replies)

≪ Previous: (:P) MOAR stepper motor experiments (no replies)

SKYPE: robotdigg
Email: gtwmotor@yahoo.com

We are manufacturer of nema17 stepper motors for 3d printers
Nema17 34mm 0.28N.m MOQ 25pcs price at 6.45USD/pc
Nema17 40mm 0.4N.m MOQ 25pcs price at 6.75USD/pc
T2.5 Pulley and Belt, 2.1USD/pc and 2.1USD/M 50M per piece
LM8UU Linear Bearing 0.6USD/pc
608ZZ/ABEC-7 Ball Bearing 0.3USD/pc

↧

problem with hammering noise in stepper motor and not moving X-axis (5 replies)

September 16, 2012, 10:24 am

≫ Next: Adding another stepper motor (3 replies)

≪ Previous: NEMA 17 Stepper w/ T2.5 Pulley, Drop Ship Worldwide. (no replies)

Hi everybody,
Can somebody help in problem with hammering noise in stepper motor and not moving X-axis?
Story about Mendel Prusa, and it is -
Sprinter latest version, with RAMPS 1.4, and Mega 2560 board.
Sprinter compiled by Arduino 1.0.1.
It was some bugs in compilation which was obvious:
In Sd2Card.cpp:
====================================
#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include
#endif
====================================
In SdFile.cpp:
===================================
#if ARDUINO >= 100
size_t SdFile::write(uint8_t b)
#else
void SdFile::write(uint8_t b)
#endif
{
#if ARDUINO >= 100
return (size_t) write(&b, 1);
#else
write(&b, 1);
#endif
}
===================================
I also disable SD card support in Configuration.h
I confirm wiring 1.4 RAMPS is like RAMPS 1.3.

Then I upload firmware. Start REPRAP host – it barked with messages like “dude respond with error” “timeout” and reprap host was not functional (sometime I did see reading of a temperature, sometime I was able to switch on heater on a bed, but no movement on any motors). Searching Forums shows “Yep! This is a bug in reprap, but let fix it in ReplicatorG first”.
Ok – I download and configured “ReplicatorG” and started to work.
In control panel I was able to move X-axis and Z-axes. I Adjust current on driver of stepper motor board to make bed move with less sound, and also adjust current on Z-axis to move up and down without jumps and noise.

Here come the problem: X-axes is makes hammering noise and jumps left-right without horizontal movements.
To solve I tried:
- I swapped X-axes with Y-axis connectors to stepper motors – well after swapping hammering comes from Y-axis, and X-axis is moving perfectly.
- Then I swapped (from original configuration) stepper motor drivers – X-axis is still hammering with different drivers.
- I tried to adjust current on a stepper motor driver for X-axis without any success.
- I checked signal on driver – direction pin looks working. To see another signals looks like need to plug oscilloscope.

That four experiments shows that the problem not in motors wiring, and not in stepper motor drivers, but ether in-
a) In firmware (wrong executing G-codes ?)
b) In wiring from Mega 2650 to RAMPS 1.4 ( pin 54, 38?)
c) In ReplicatorG (wrong commands send to Mega 2650?)

Or may be somebody knows different reason for this?

Alex Dobrianski

↧

Adding another stepper motor (3 replies)

April 6, 2013, 9:08 am

≫ Next: Is this motor a good investment? (3 replies)

≪ Previous: problem with hammering noise in stepper motor and not moving X-axis (5 replies)

Hi there reprappers

I have been given a Prusa Mendel (aready assembled and working) in university which is driven by a Sanguinolulu board, and have been given the task to design a rotating part that is driven by a stepper motor (its movement is independent of the axes' and the extruder's motors). I am not entirely sure if it is possible to use the current Sanguinolulu board or if I will need another controller. I have access to an Arduino UNO and EasyDriver, which I could presumably just hook up and use to control the extra stepper motor, although ideally I'd want this motor to be controllable from within the same printer interface (printrun) and if there is a possible way of doing it without using the Arduino UNO that would be great. This is the one I'll be using if that will make any difference.

As you may be able to tell, I have very limited knowledge, but pointers in the right direction would be really appreciated as I found the amount of info on the internet to be slightly overwhelming and the time-frame I am working with is somewhat limited.

Thanks in forward, and apologies if this is in the wrong section/forum.

↧

Is this motor a good investment? (3 replies)

April 8, 2013, 8:21 pm

≫ Next: Threaded Rod NEMA 17 (no replies)

≪ Previous: Adding another stepper motor (3 replies)

Hi,

I did try to recycle used motors not taking too seriously the resistance (4.7 ohms per coil) and just connected them to my 4988 drivers using 12V. The result is burning hot motors that after a few minutes start skipping steps.

After looking around on Ebay, I saw these Nema 17, 70 oz-in torque, 30 ohms per coil and 0.4A@12V motors for around $16 USD/ each. The questions are: are they good motors? Will they still get hot and skip steps?

Any advice will be greatly appreciated.

[cgi.ebay.com]

FYI - I have a prusa mendel with linear bearings, wade's extruder and Budasnozzle 1.2 hot end.

↧

Threaded Rod NEMA 17 (no replies)

April 15, 2013, 12:42 am

≫ Next: Trouble with stepper motors (2 replies)

≪ Previous: Is this motor a good investment? (3 replies)

Threaded Rod NEMA17 or Threaded Shaft Nema 17 are languages from 3Ders or not, I am not sure is not that important.
But let's figure out what's in professional:
Threaded Rod or Threaded Shaft Stepper Motor could be External Drive Linear Stepper Motor or Non-captive Linear Stepper Motor.
3Ders can find NEMA17 Threaded Rod Stepper Motors are used in a Makerbot or Reprap.
Tr8*8 150mm or 280mm long Leadscrew are talked the most for 3d printer Z axis. Compared with combination: NEMA 17 Stepper Motor, Coupler and Metric Screw, a Threaded Shaft Nema 17 are much better in quality. The results of the printing is different in night and day.
You could read more the following link:
Z Motor setup comparison
Metric Screw is material in 45# carbon steel usually. But a Threaded Rod from LoopMotion.com is #304 stainless steel.

How Much a Threaded Shaft Nema 17 Stepper Motor?
How much costs a threaded rod nema17, it's mainly depend on the Length of the Leadscrew, the Diameter, the pitch etc.
A nema17 threaded shaft stepper motor with 280mm Tr8*8 leadscrew and POM nut, sample price costs 30USD/pc.
Tr8*8 is not the only choice of Leadscrew for 3d printer. But Tr8*8 is strong enough for any projects using a threaded rod nema17.

↧

Trouble with stepper motors (2 replies)

April 16, 2013, 4:41 pm

≫ Next: Lower Voltage But Louder Motors? (3 replies)

≪ Previous: Threaded Rod NEMA 17 (no replies)

I am having trouble getting my stepper motors to move, they simply hum when pots on driver is turned towards the minimum and click and lock when the current is turned up.

I am using ramps 1.4 (reprap discount) and standard 4 wire NEMA 17 stepper motors, I only have motors plugged into the ramps at the moment.
I have loaded Marlin but also tried sprinter
I have checked and double checked that wiring is correct (identified coil pair).
Pronterface seems to be working fine as I can connect, and get the motors to make some noise.

The only way the motors will show any sign of doing anything (locking, humming) is when i click the home button, the jog command does not seem to do anything.

Could it be an issue with power supply not providing enough current? I am using a ATX and have checked the voltage.

Or is it an issue with the configuration?

I also tried the mechanical switch in case this was causing the problem, but this did not seem to change anything.

I am a little lost as to what to try next, any help would be appreciated!!

↧

Lower Voltage But Louder Motors? (3 replies)

April 24, 2013, 4:59 pm

≫ Next: Is it worth buy and use this motor? (no replies)

≪ Previous: Trouble with stepper motors (2 replies)

I've been using a set of Shinano Kenshi STP-42D3018 stepper motors for the X, Y, and E motors in my RepStrap that are 8.8V 0.64A 11.6Ω bipolar and 5.2V 0.9A 5.8Ω unipolar. I've been using them as unipolar motors because the bipolar resistance of 11.6 Ohms is apparently too high. They've actually worked quite well, especially the XY, with 47 oz.in. of holding torque. But it seemed like a waste to use these bipolar motors as unipolar. With so many different voltage ratings for stepper motors it also seemed like a waste to use 5.2V if there are motors using 3V and under. Plus the extruder motor was getting pretty warm; so if nothing else I wanted a stronger bipolar motor for that.

So I found a new set of motors that seem more ideally suited, especially for the E motor. These KL17H247-168-4B motors are bipolar with 62 oz in. torque. They use 2.8V at 1.68A 1.65Ω, which is a bit less current than 5.2V 0.9A 5.8Ω (or is it?). I installed one as my E motor and it works great, barely gets warm after hours of printing.

So I just installed one of these as the Y motor and tuned the stepper driver to the point where the motor has a reasonable amount of torque. But a couple of things are apparent right away. First, it seems to need me to dial up more current from the stepper driver than the 5.2V unipolar motor did. So that's interesting. And the motor is significantly louder than the previous motor, to the point where I'm thinking of going back to the old motor even though it's got a slightly higher power rating and gets a little warmer.

So I have a couple of questions...

↧

Is it worth buy and use this motor? (no replies)

April 24, 2013, 8:34 pm

≫ Next: wrecking stuff (no replies)

≪ Previous: Lower Voltage But Louder Motors? (3 replies)

Hi,

I found this motor )NEMA 17 42BYGH47-401A CNC Stepper Motor 62oz-in 1.68A) and it looks like that fits for assembling a 3d printer so...

Do you think this model works good for the a 3d printer? (RepRap Prusa Mendel 3D printer)
Is it worth buy it?

US$: 19.52

Model: 42BYGH47-401A
Step angle:1.8°
Motor length: 47mm
Rated voltage: 2.8V
Rated current: 1.68A
Phase resistance: 1.68Ω
Phase inductance: 2.8mH
Holding torque: 62Oz-in/4400gf.cm
Lead wire: 4
Rotor inertia: 68

↧

wrecking stuff (no replies)

April 28, 2013, 2:04 pm

≫ Next: Controlling MDrive 23 ( schneider elect ) with Python.... (no replies)

≪ Previous: Is it worth buy and use this motor? (no replies)

i found this motor small stepper now im cosidering building something around the motor

↧

Controlling MDrive 23 ( schneider elect ) with Python.... (no replies)

April 29, 2013, 8:38 pm

≫ Next: Problem with dual Z stepper motor - One is getting harder to rotate (no replies)

≪ Previous: wrecking stuff (no replies)

hi all...this forum looks like it has the group of people I need...the SE site is for the pros of interface design
and I'm trying to work with linux and python.

I've got the linux program screen to connect to the motor (Via USB /dev/ttyUSB0 ) and make the motor execute basic commands.
However my PySerial commands haven't worked yet...and I'm lost now.

I don't understand some communication details and what to configure them as, other than baud rate...
parity, stop bits, num of bit/byte...

Cheers,
wbg

import serial
ser = serial.Serial('/dev/ttyUSB0', 19200)
ser.isOpen() # returns True
ser.write('ma 100000\r\n') # does nothing...
ser.inWaiting() # returns 0
ser.close()

↧

Problem with dual Z stepper motor - One is getting harder to rotate (no replies)

May 2, 2013, 4:56 pm

≫ Next: Are these motors good? (no replies)

≪ Previous: Controlling MDrive 23 ( schneider elect ) with Python.... (no replies)

It is a very wierd problem which I don't understand.

I'm currently calibrating my printer and I have problem with Z axis.
I currently have a MixG1 printer with RAMPS and pololu drivers. My two Z axis motor are connected to two 4-pins under Z axis stepper driver. They are connected in parallel.
I' played with the trimpot a little bit, but this problem seems to be back after some movements (less than 100mm)

The same motor is always blocking after a while, it gets very hard to rotate, even by hand. The other one is quite fine and easy to rotate. When I manually turn the «hard» one, the other one tend to rotate too, like if it was receiving pulses. Both motors runs very cold, nothing to worry about temperatures.

What is wrong?

↧

Are these motors good? (no replies)

May 5, 2013, 12:27 pm

≫ Next: How to identify specs of working motor (1 reply)

≪ Previous: Problem with dual Z stepper motor - One is getting harder to rotate (no replies)

Hello! I have bought these motors without much knowledge. I am new to reprap project and i have noticed that some problems my rise sooner or later from a bad stepper motor choice. The ones i ordered are these: [www.ebay.com]
Are they ok?

Thanks in advance.
Santiago

↧

How to identify specs of working motor (1 reply)

May 7, 2013, 1:38 am

≫ Next: Testing stepper motors (no replies)

≪ Previous: Are these motors good? (no replies)

Hi all.

I have an Epson flatbed scanner I'm about to trash. The stepper in it is still working, so before I get rid of the circuit board that drives it, I'm wondering how to capture the specs for it. I have a digital multimeter. The motor is a four-conductor design that plugs into a modular plug; when I power up the scanner, it moves the motor briefly. Not sure what measurements to take in order to determine the motor specs. Thanks for any insight.

↧

Testing stepper motors (no replies)

May 13, 2013, 4:20 pm

≫ Next: Nema 17 not beefy enough need help with driver selection (no replies)

≪ Previous: How to identify specs of working motor (1 reply)

I am currently in the middle of building my own design delta printer - closer to a Kossel than to a Rostock. I don't yet have the electronics - I'm not sure which direction I'm going - but I wanted to test the stepper motors I recently installed.

I have an adafruit motorshield for my arduino uno, so I connected the motor to it, connected a 12 volt power supply to the motor power supply, removed the jumper from the board, and proceeded to load and try the sample sketch that adafruit provides. I got SOME movement from the motors, but before anything substantial could happen, there was a big puff of smoke from the motor shield. I quickly disconnected everything.

I'm wondering 1) what I could have done wrong, and 2) did I damage my motor. According to the Lulzbot web site, the motor is rated at 2.8 volts. I'm not sure what the adafruit board puts out, but I was supplying 12 volts to it. I though I heard of people running their steppers at up to 24 volts, so I thought I'd be safe.

I guess it's possible that I hooked the motor up wrong. An on-line spec sheet indicated that green/black was one coil and red/blue was the other. I hooked them up in the order black, green, nc, blue, red as I was looking at the adafruit board.

Any assistance would be greatly appreciated.

↧

Nema 17 not beefy enough need help with driver selection (no replies)

May 13, 2013, 5:32 pm

≫ Next: So i took apart this copier... (1 reply)

≪ Previous: Testing stepper motors (no replies)

Hi I am reengineering my 3D printer around a very sturdy Z axis assembly I found surplus.

I don't think my Nema 17 motor is enough to do the job anymore but looking at specs it seems the drivers on my Azteeg X3 don't handle loads bigger than what most nema 17 put out.

I know from the Azteeg X3 manufacturer that I can remove a driver chip and tap into the pins so I can use an external driver board, but I don't know what boards to get. Most vendors I am familiar with will sell larger steppers but the driver boards they sell only go up to 2A.

Do you guys have any recommendations. I will need a torquey nema 23 or possibly one larger.
The assembly I found runs on a high end BEI dc motor with encoder and has a 3/8 output shaft. (Im still waiting for the manufacturer to give me specs on it) it looks like it was designed to carry a bit more load than what I will be putting on it.... Ill attach pics...

↧

So i took apart this copier... (1 reply)

May 16, 2013, 10:56 pm

≫ Next: CNC TB6560 can be used in the the 3D printer Machine? (no replies)

≪ Previous: Nema 17 not beefy enough need help with driver selection (no replies)

I have a job that gives me access to a bunch of big copiers that will eventually be thrown away. Today I got to pull one apart and grab some parts. I found 6 nema 17 motors, a pile of gears, belts, solenoids and maybe even a frame for my (eventual) 3D machine.

I'm curious about a few of the motors.
Here they are:
(Sorry its hard to tell when the focus is off from a phone)

I know it's blurry. Here's a list of part numbers from top left to bottom right:

STP-43D1052
17PM-J343-P5VS
17PM-J343-P4VS
STP-43D1053
STP-43D1052
17PM-J212-G3VS

I found data for the Minebea motors and I think they will work. I'm not sure about the digits on the end of those but I'm assuming those have something to do with the gears on the motor shafts. The smallest has a brass gear with angled teeth :D

I'm having a hard time finding anything on the other 3 (the STP models).

Anyone have any ideas what the other 3 motors are? My arduino mega should be here tomorrow. Then I can figure out if I can re-use the driver boards or power supply. Should be a fun weekend :)

Has anybody worked with copier parts?

↧

CNC TB6560 can be used in the the 3D printer Machine? (no replies)

May 16, 2013, 9:09 pm

≫ Next: how to control stepper motor (no replies)

≪ Previous: So i took apart this copier... (1 reply)

I have had nothing but problems that the CNC TB6560 can be used in the the 3D printer Machine.

CNC TB6560 3 Axis Stepper Motor Driver Controller Board For Engraving Machine
Has anybody used these motor driver before

My friend has the othe TB6560 3.5A Stepper Motor Driver right now and says its working great but I suspect it's quality so I want to make sure before I buy. Alternatively what other would you recommend for around $68?

↧

how to control stepper motor (no replies)

May 17, 2013, 3:43 am

≫ Next: Jerky Stepper Movement and Idle Pulsing (1 reply)

≪ Previous: CNC TB6560 can be used in the the 3D printer Machine? (no replies)

Hello
can One controler a stepper motor nema 17 (http://www.phidgets.com/products.php?product_id=3318)
with
-power supply 12V 5A (http://www.ebay.fr/itm/Adaptateur-secteur-alimentation-LED-AC-DC-220V-12V-5A-5-5mm-/220916891047?pt=FR_YO_MaisonJardin_Bricolage_InstallationElectrique&hash=item336fac3da7#ht_1866wt_1031)
-a voltage regulator (LM2596 Power step-down Modulates DC 4.0~40 à
1.3-37V Adjustable + LED Voltmeter) - [www.ebay.com]

thanks

↧

Jerky Stepper Movement and Idle Pulsing (1 reply)

November 25, 2012, 2:50 am

≫ Next: This 12V motor is too hot... (1 reply)

≪ Previous: how to control stepper motor (no replies)

Hi Everybody,
I've finally got my printer assembled, and I'm having issues with my stepper motors. I got them from here: [www.robosprout.com] and I'm driving them with pololus and a Generation 7 1.4 electronics board with a recent checkout of Teacup firmware essentially stock. The symptoms I'm experiencing are as follows and affects ALL steppers, however I'll describe them in terms of the X axis.

If I command the X axis to move left using pronterface, most of the time it will move left something that looks like the appropriate number of units. Sometimes it will be very jerky and may or may not travel the expected distance. With a short distance such as .1 I will hear it engage briefly but usually will not observe any perceptible movement. Following any stepper activity the stepper motor will make a regular "pulse" or "click" of varying volume for a short period (almost exactly 30 seconds). During the pulsing the axle will move a small amount each pulse. Finally, sometimes upon issuing a command the X axis will move the opposite direction of what I requested.

My first question is: is it possible these steppers are wired wrong? I assume that if the steppers were wired wrong I would never get any movement beyond moving between two adjacent steps.

My second question is, what could be causing this issue? I read that adjusting the potentiometer on the pololu to reduce the current could address this issue, but I dialed it all the way to the lowest current, and increased the current until the steppers would move, the pulsing returned before the steppers had enough current to move.

Thanks for any and all help,
Dan

↧

This 12V motor is too hot... (1 reply)

May 23, 2013, 1:45 pm

≫ Next: stepper motor NEMA 17 speed (1 reply)

≪ Previous: Jerky Stepper Movement and Idle Pulsing (1 reply)

Greetings fellow Reprapers!

I want to ask you for advice regarding setting properly the Vref for my extremely hot stepper motors.

But first some details to know what is the setup.
- Reprap Prusa Mendel
- Gen.7 1.5.1 electronics (thanks Traumflug!)
- Pololu drivers
And most importantly:
5 exact stepper NEMA17 motors:
- degrees per step: 1.8
- voltage: 12 V
- peak current: 0.5 A
- resistance: 25 ohm
- inductance: 46 mH
- static torque: 4.4
- 4 wires

Right now I know that high voltage motors are not recommended, but the time I bought them I was even less experienced than now ;)

Anyway, following the Reprap- Sanguinololu setup instructions,( [reprap.org] ) I calculated the Vref for my motors to be:
Vref = 0.14V.

Then carefully I set them on the Pololu's, and started other calibrations. But after a while of printing I found out that the working motors are heating quite much (I can not measure the temperature, but its hard to keep a finger on them). I suppose this is because of too high current going through the motors. At the same time, I am not sure in which way to change the Vref on the Pololus not to screw up the whole printer.

I would really appreciate any suggestions, directions, well, any help!
Best,
Paweł

↧

Latest Images