Q: How to Set the Current on Stepper Driver, RMS or Peak?

The RMS Current and the Peak Current are two different ways of expressing the same electrical current that flows through a stepper motor. The difference between them is in how the current is measured and calculated. <img src="https://storage.crisp.chat/users/helpdesk/website/37f68eb25a0a5200/1_k9lpaa.jpg" alt="" /> The RMS current is a measure of the effective or average current that flows through the motor coils over time. It takes into account the fact that the current is not constant but varies over time as the motor steps. The RMS current is calculated by taking the square root of the average of the squared current values over one cycle. The peak current, on the other hand, is the maximum current that flows through the motor coils during each step. It represents the instantaneous value of the current at its peak, which occurs when the motor is starting or stopping. In general, the RMS current is used to specify the rated current of a stepper motor, and it's the value that should be set on the stepper motor driver. This is because the RMS current is a more accurate representation of the average current that the motor can safely handle without overheating or damaging the coils. The peak current, on the other hand, is used to calculate the power dissipated by the motor coils, and it's important to ensure that the stepper motor driver can handle the peak current without exceeding its maximum rating. Some stepper motor drivers have a feature that can limit the peak current to

Question 1

Wiring Diagram for Closed Loop Stepper Motor

Accepted Answer

For STEPPERONLINE's closed loop stepper motor with a GX-16 and DB-15 connector, the wiring sequence is as follows:

1. Motor Connection

| Pin | 1 | 2 | 3 | 4 | | --- | --- | --- | | Pole | A+ | A- | B+ | B-| | Color | White | Green | Blue | Black | Or

| Pin | 1 | 2 | 3 | 4 | | --- | --- | --- | | Pole | A+ | A- | B+ | B- | | Color | Black | Green | Red | Blue |

2. Encoder Connection

| Pin | 2 | 3 | 1 | 13 | 11 | 12 | | --- | --- | --- | --- | --- | --- | | Encoder | VCC | EGND | EA+ | EA- | EB+ | EB- | | Color | Red | White | Black | Blue | Yellow | Green | **Note: **

The motor wire is not a shielded wire.
The encoder wire is a shielded wire, and the thick black line on the encoder wire is the shield layer of the encoder wire, which does not need to be wired.

3. The wiring diagram is as follows:

3.1 CL42T is recommended for NEMA17 or smaller closed loop stepper motors, and the driving voltage is recommended to be 24V.

3.2 CL57T is recommended for NEMA23 or 24 closed loop stepper motors, and the driving voltage is recommended to be 24~48V.

3.3 CL86T is recommended for NEMA34 closed loop stepper motors, and the driving voltage is recommend

Question 2

How to Set the Current on Stepper Driver, RMS or Peak?

Accepted Answer

The RMS Current and the Peak Current are two different ways of expressing the same electrical current that flows through a stepper motor. The difference between them is in how the current is measured and calculated.

The RMS current is a measure of the effective or average current that flows through the motor coils over time. It takes into account the fact that the current is not constant but varies over time as the motor steps. The RMS current is calculated by taking the square root of the average of the squared current values over one cycle.

The peak current, on the other hand, is the maximum current that flows through the motor coils during each step. It represents the instantaneous value of the current at its peak, which occurs when the motor is starting or stopping.

In general, the RMS current is used to specify the rated current of a stepper motor, and it's the value that should be set on the stepper motor driver. This is because the RMS current is a more accurate representation of the average current that the motor can safely handle without overheating or damaging the coils.

The peak current, on the other hand, is used to calculate the power dissipated by the motor coils, and it's important to ensure that the stepper motor driver can handle the peak current without exceeding its maximum rating. Some stepper motor drivers have a feature that can limit the peak current to

Question 3

Voltage of Stepper Motor

Accepted Answer

When discussing the voltage of a stepper motor, it is important to first clarify whether it is the Rated Voltage or the Drive Voltage.

Rated Voltage:

The rated voltage of a motor can be obtained directly from the motor's data sheet. The rated voltage is usually listed in the technical data section of the data sheet, along with other motor parameters such as rated current, holding torque, and step angle.

If you do not have access to the motor data sheet or the rated voltage is not listed, you can try to determine the rated voltage by measuring the resistance of the motor coils. Using a multimeter set to resistance mode, you can measure the resistance of each coil. The resistance values of all coils should be approximately equal and can be used to calculate the rated voltage of the motor using Ohm's Law:

|| Voltage = Current x Resistance

For example, if the rated current of the motor is 1.5 A and one coil has a resistance of 1.2 ohms, the rated voltage of the motor can be calculated as follows:

|| Voltage = 1.5A x 1.2 Ohm = 1.8V

Drive Voltage:

Each stepper motor must be connected to a driver in order to function, so the drive voltage is applied to the stepper motor driver. When talking about the voltage of a stepper motor, usually the drive voltage is meant.

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Question 4

Stepper Motor Does Not Rotate After Connecting to the Driver

Accepted Answer

This is a quick troubleshooting guide on how to resolve the issue of a stepper motor not rotating after connecting it to a driver, applicable to all stepper drivers from STEPPERONLINE. Here is the video how to solve this issue. ${youtube}Methods To Solve The Issue That The Stepper Motor Does Not Rotate After Connecting It To The Driver And the following is the text.

Firstly, you can perform the following steps to troubleshoot the problem:

1. Double-check all the wiring. You may need to refer to the manuals of both the motor and driver.

Note: It's better to test the motor and driver separately instead of installing them in your production equipment to eliminate other interfering factors.

Note: The wire colors in the picture are for display only. For the actual correct wiring sequence, please refer to the motor drawing !

2. Check if the power voltage and signal voltage of the driver are correct. In particular, make sure the signal voltage set by the driver matches the voltage provided by the controller. According to our feedback records, 40-50% of the motors do not turn because of this reason. Because the control signal voltage is 5V, and the driver defaults to 24V.

3. Try disconnecting the ENA+/- interface if you have connected it.

**4. Power on the dr

Question 5

What the Differences Between the HE, HS and HP Motors?

Accepted Answer

In order to meet the needs of different customers, we have three main production bases for stepper motors, and each production base produces different series of products.

The main difference is:

| Series | E | S | P | | ---- | | Version of Motor | Economy Version | Standard Version | Professional Version | | Advantages | High cost performance | Good performance with reasonable price | High performance | | Raw Materials of Motor(Stator, magnetic steel, enameled wire, etc.) | High cost-effective raw materials, using standard molds from B-class suppliers in the market | Standard raw materials, using standard molds from A-class suppliers in the market | High-performance raw materials, using exclusively developed exclusive molds with optimized performance | | Performance of Motor | Suitable for low-speed application scenarios, the motor has 50% more torque than competing products in supermarkets | Suitable for medium and low-speed application scenarios, the motor has 5-10% more torque than the economic version | Suitable for medium and high-speed application scenarios, with lower temperature rise and 10-15% more torque than the standard version | | Application of Motor | 3D printing machines, stage lighting, security surveillance, household appliances | 3D printing machines, engraving machines, medical equipment, robots, automation equipment, household appliances | Medical equipment, aviation, energy, high-precision automation equipment |

Question 6

How to Choose a Power Supply for My Stepper Motor?

Accepted Answer

When using a stepper motor, you'll need a power supply to give power to stepper motor. A right power supply can make your stepper motor working at optimum performance, Instead, a wrong power supply might cause low performance or larger waste of energy.

Below are few tips for choosing Power Supply:

Confirm motor's rated current. You can find it at motor datasheet.
Confirm driving voltage. Driving voltage is main factor when choosing a power supply. Normally, higher voltage will have better performance.

Below table are the recommend voltage for stepper motors, you can choose a driving a right voltage as per your application.

Calculate the power value. We provide a simple formula for you: P=nIV*1.2

|| P: Power value || n: Number of stepper motors || I: Motor rated current || V: Driving voltage || 1.2: meaning 20% of margin

eg. 3 units of motors with 3A rated current each and driving voltage is 36V, the estimate power is about: 33A36V*1.2=388.8W. so, you can choose an 36V 400w power supplier.

**Please note that this formula is only an estimate of power and that different operating conditions will require different power. ** For example, in a 3-axis system, not all three motors operate simultaneously, and not all three motors operate at maximum load, etc. In such cases, the power value may be lower than the value calculated by the form

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