Comments by Brandon

New product: Tic 36v4 USB Multi-Interface High-Power Stepper Motor Controller

Hello, Kevin.

To use a 6-lead stepper motor like product #1475 as a bipolar stepper motor, you can leave the center tap wires (yellow and white) disconnected as they are not used for bipolar operation.

Brandon

New product: Logic Level Shifter, 4-Channel, Bidirectional

Hello, Kevin.

That is the normal behavior of the level shifter. As described on the product page and in the post above:

• When Lx, the lower-voltage input, is driven low, the MOSFET turns on and the zero passes through to Hx.
• When Hx, the higher-voltage input, is driven low, Lx is also driven low through the MOSFET’s body diode, at which point the MOSFET turns on.
• In all other cases, both Lx and Hx are pulled high to their respective logic supply voltages.

New products: more special servos with position feedback

Hello.

As described in the post above, the feedback wire gives direct access to the servo's feedback potentiometer. It is an analog voltage signal, and it varies linearly throughout the servo's range of motion by a couple of volts.

Brandon

New product: Motoron M3H256 Triple Motor Controller for Raspberry Pi

Hello, Andrew.

The Motoron controllers do not have any special support for processing encoder signals, so while it can be used to drive motors with encoders, you would need to process those signals separately.

Brandon

Sanyo pancake stepper motors with encoders

Hello, Stephan.

We are not aware of any UL or CE ratings for the Sanyo stepper motors.

Brandon

New NEMA 17 stepper motor with optional integrated lead screw

Hello.

The lead screw is built into the stepper motor and is not removable. We carry a few versions of this stepper motor with different lead screw lengths, including this one with a longer 38cm lead screw. Details about the screw can be found in the datasheet located in the "Resources" tab of the product page.

We can also customize the shaft length for special volume orders (typically at least a few hundred units). If you are interested in placing such an order, please email us.

Brandon

New products: G2 High-Power Motor Driver 18v25 and 24v21 (and price drops for other G2 drivers)

Hello. Tao.

The practical voltage range of that pin will depend on your setup, as implied by the sensitivity information you mentioned. When there is no current draw, the CS pin should read ~50mV (the offset). The maximum voltage on the CS pin depends on your particular motor. For example, if the stall current of your motor is 20A, the CS pin would be 450mV when that is reached (i.e. 20A × 20mV/A + 50mV).

Brandon

New products: DRV8256E/P motor driver carriers

Hello, Don.

Table 7.2 in the DRV8256E datasheet is consistent with our documentation. When EN is high, the outputs are driving, and when it is low, they are high impedance (i.e. coasting). Connecting a PWM signal to this pin results in variable speeds proportional to the duty cycle, with the direction of the current controlled by the PH pin (i.e. sign-magnitude operation). We do not explicitly mention it in our documentation, but you can connect a suitably high-frequency PWM signal to the PH pin instead if you want locked-antiphase operation. Is that how you are using yours?

Brandon

New products: DRV8256E/P motor driver carriers

Hello, DonQ.

That is how the driver is intended to be used. If you still think there is a problem with that, can you elaborate?

Brandon

New Pololu distance sensors with digital and pulse width outputs

Hello.

We do not have any example Arduino code for that specific purpose, but you can find a simple example Arduino sketch that reads the output of the Pololu Distance Sensor with Pulse Width Output, 50cm Max and displays the measured distance in millimeters on the sensor's product page. It should be fairly simple to use that as a reference and add some IF statements to activate your various relay boards. If you try doing that and have problems, I suggest posting a request for help that includes what you have so far on our forum, which is a much better place for debugging or troubleshooting code.

Brandon