kamaroman68
USA
Asked
— Edited
So Im wondering if the ezb4 will have a command for pulse output. I need 5vdc pulses to the tune of some 20,000 pulses. Less pulses , less travel. More pulses ,more travel. Im not concerned about resolution. Or would I need to write a script and loop the script the required amount of times for the required amount of travel. Will the EZB 4 put out 5vdc out of any of its ports? I will be powering everything from 1 sla battey 12vdc. I think I read that the ezb4 will only put out the same voltage as applied to the input side (12vdc). Thanks Chris
Here is what I need, taken directly from manufacturers instructions.
Input Signal Circuit Opto-coupler input with 440 Ohm resistance (5 to 15 mA input current), Logic Low is input pulled to 0.8 VDC or less, Logic High is input 4 VDC or higher Pulse Signal Motor steps on falling edge of pulse and minimum pulse width is 0.5 microseconds Direction Signal Needs to change at least 2 microseconds before a step pulse is sent Enable Signal Logic 1 will disable current to the motor (current is enabled with no hook-up or logic 0)
I will not be using the enable signal. Thanks Chris
Are you attempting to control stepper motors? Is that what a "chopper" motor is? If so, I would highly recommend using a stepper motor controller instead of the EZ-B natively. That way you can offload the processing to a cheap stepper motor controller, rather than use processing power on the EZ-B.
Yes, One stepper motor. The motor is being controlled by a stepper drive(aka chopper drive). The drive for this motor requires a step, and direction set of pulses (5vdc). I may be able to post the entire pdf later when home, if that helps. Thanks again. Chris
This is one of my favorite and affordable stepper motor controllers. There are cheaper ones, but these guys have pretty reliable hardware: http://www.byvac.com/bv3/index.php?route=product/product&product_id=90
STP-DRV-4035
STEPPER DRIVE 3.5A 12-42VDC 2-PH BIPOLAR MICROSTEPPING
Description SureStep microstepping drive, 3.5A per phase, 2-phase bipolar PWM controlled current, 12-42 VDC powered, optically isolated digital inputs for Step, Direction, and Enable. 1/2, 1/5, 1/10, and 1/50 step modes, 0.4-3.5A/phase, idle current cutback, and test mode are all dipswitch selectable (no software required).
I cant seem to link manual so this is its description, it is found at automationdirect.com. I already own the unit from a different project. Just want to clarify it will work with my new ezb4. Thanks Chris
I would try it with the PWM - and if that works, you're golden. Newer stepper motor controllers do not require the processing of the main brain (i.e. ez-b v4). This is because the EZ-B v4 is doing a billion other things. For example, it is streaming your audio, video, pwm, servos, serial ports, i2c, web server, wifi, and TCP/IP Stack. Performing repetitive things, such as turning on and off stepper motor solenoids is not a great use of it's function. I would recommend trying your device with the EZ-B v4 PWM. If that does not work, then using a newer model stepper motor controller - one that has a popular (i2c/serial) communication interface and relieves the processing of the EZ-B v4.