26
votes
Accepted
FPGA to control NEMA stepper motor
No. Just like a microcontroller, an FPGA pin will provide nowhere near enough current to drive a motor.
If you're lucky you might get 20mA out of an FPGA pin, in practice most I've come across are ...
- 70.7k
5
votes
Should ferrite beads be closer to the stepper motor or to the motor driver?
Put the bead on the side that connects to the driver board. The bead will suppress CM noise from the board.
- 58.6k
5
votes
Accepted
TMC2130 does not work properly
When things don't make sense, then it's time to RTFM. According to the TMC2130 datasheet, the spi pins (and others) are configuration inputs.
Section 24 of the datasheet explains.
To select edit[SPI] ...
- 6,678
5
votes
Accepted
Bipolar stepper motor spins very slowly and makes a loud noise
Check with a multimeter that red-yellow is one coil and blue-orange is the other.
The chart shows that you've got to start the stepper at about 500 Hz and ramp up. Starting at too high a frequency ...
- 181k
5
votes
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a4988 pulldown resistor necessary for ms1 ms2 ms3
If you look at the data sheet, the microstep select pins have internal pull-dows, so they can be left floating.
- 172k
4
votes
Isolating digital I/O on an Atmega328
I would use a dual supply level translator such as 74LVC8T245.
As stated in the datasheet, when either VCCA or VCCB are at the GND level, both ports are at high impedance (i.e. disconnected). ...
- 5,367
4
votes
How does this part of the schematic control the torque?
This circuit is designed to reduce the power to your stepper motors when they are idle to prevent overheating. It does this poorly. Adding a 1N914 diode placed in parallel with R4 will guarantee that ...
4
votes
How do I wire a TMC2130 stepper motor driver to an Arduino UNO in order to control it?
This schematic reminds me of those DRV8825 schematics. Pretty simple to follow:
Source: TC2130 Arduino Wiring (Last checked: 07/13/2018)
4
votes
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Why is the common lead of unipolar motor connected to the high level voltage?
Silicon switching devices intended for low side switching (ie, the ground side) such as N-FETs and NPN transistors utilize bucket brigade displacement of free electrons in the silicon as charge ...
- 33.6k
4
votes
Stepper motor driver TMC2209 is powered from microcontroller logic pins
From the datasheet you can see the input has protective diodes. Your VCC is floating, but if you apply voltage to the STEP pin, the VCC gets powered through the protective diode.
- 85
4
votes
Accepted
What could be the reasons for a stepper motor stuttering with an A4988 driver?
After many days, I have finally tracked down the causes of the issues.
Software
I misunderstood the purpose of Pull Up/Pull Down resistors within the MCU. I thought floating pins (which the STEP pin ...
- 161
4
votes
Accepted
How do Arduino-based 3D-printers control several stepper motors at the same time?
The delay() function is bad programming practice and it's unfortunate that it is taught to beginners.
...
- 181k
4
votes
FPGA to control NEMA stepper motor
No, not possible to drive motors directly from an FPGA.
The FPGA IO pins are logic level signals. While perhaps they can be quite strong for logic level signals, they are not strong enough to provide ...
- 172k
4
votes
BLDC vs Stepper motor
Both use identical drivers but different algorithms and have different responses in speed, RPM and torque. A BLDC can be the best choice for small high RPM or low RPM with position servo control but ...
- 148k
4
votes
BLDC vs Stepper motor
Stepper motors are reluctance machines. The rotor is made of steel, although there are also hybrid models which do have also a permanent magnet The rotor aligns to stator in a such way that reluctance ...
- 24.5k
4
votes
Purpose of PWM in a stepper motor driver
Stepper motors are externally-commutated motors. So the speed is controlled by the driver which varies the speed operating on how quick the phases are exchanged.
Often they also run in open loop, i.e. ...
4
votes
Can you control the speed of a DC motor with a stepper motor controller?
No, that won't work.
A stepper motor driver outputs switched DC waveforms, which is somewhat similar to AC, in sync with the position of the shaft.
A DC motor requires DC. A PWM is also a switched DC ...
- 25.7k
4
votes
Accepted
TMC5160 stepper drivers don't enable the motor, "open load" bits set, driver error
I use this driver and the open load problem is there when there is a connection problem. But in this case, it looks to me that the footprint of the WSD4098 is wrong:
Based on this picture, the Pin 4 ...
- 304
4
votes
Accepted
Need a way to decrease the current used by a stepper motor through a TMC2209 when it is idle
Look at page 50 and 51 of the DATASHEET.
The setting you are looking for is "IHOLD".
It can take values from 0 to 31. 31 being full current. You will have to test in your application for ...
- 9,504
4
votes
Switch activated by stepper motor unintentionally
A button can bounce and generate multiple transitions when pressed (or released).
From the posted code, button_handler1 is set to run an interrupt handler on a ...
- 7,238
3
votes
Accepted
How does this part of the schematic control the torque?
Looks like those transistors simply delay the step signal and apply it as the current demand.
If you step fast enough it will stay in high current, and if you single step it goes into holding current ...
- 47k
3
votes
Pulse+ Pulse- with stepper motors
It may just be the anode and cathode polarity indicators for an optically isolated drive signals. Here is an example product with similar terminology from Rhinomc RMCS-225X:
http://www.active-robots....
- 1,753
3
votes
Should I worry about EMC when building a PWM stepper motor driver with 1.5 meter cable?
Should I worry about EMC when building..
ALWAYS. Any good engineer has EMC built in as a base level design criteria along with efficiency and cost. If you do not take it into account, you are setting ...
- 47k
3
votes
Driving a 5-Phase / 5-Wire Stepper Motor
You connect each phase to a separate h-bridge output. Since there is no common wire, you will have to energize at least two coils. This page shows the specific details:
http://www.orientalmotor.com/...
- 3,278
3
votes
Accepted
I need help controlling the 'sled' motor of a CD-ROM, based off of a datasheet
My notes are for measurements made on the similar BD7902 chip.
SLED_in1 has measured average voltage of 1.412V
SLED_in2 has ...
- 27.7k
3
votes
Why does (dis)connecting a stepper motor while powered on damage the driver?
Because it is possible that one of the lines will disconnect first, the inductance on the line still connected can lead to dangerously high (or low) voltage levels and the other side of the free ...
- 9,504
3
votes
Accepted
Rotate stepper motor in low RPM and minimum vibration
Stepper motors are natuarally resonant around each holding position because the holding torque varies from zero at the holding position out to a step distance away where the torque at its maximum.
...
- 47k
3
votes
Accepted
How to remove Black cooling paste on IC?
It seems to be some kind of thermal glue.
I removed it with (which I think was a lot) acetone and after a few attempts I saw some signs of a writing. It's an L293D.
In case someone else has this ...
- 51
3
votes
How do I wire a TMC2130 stepper motor driver to an Arduino UNO in order to control it?
Looks pretty straight forward to me, there is a diagram in the datasheet on page 5. I would strongly recommend you read and understand the datasheet, if you don't your more than likely to start it up ...
- 88.9k
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