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Pulse / PWM generator for stepper motor drivers (HCMODU0062) 
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Joined: Sun Aug 05, 2012 4:02 pm
Posts: 633
Post Pulse / PWM generator for stepper motor drivers (HCMODU0062)
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Description:
This pulse generator module is intended to be interfaced with common types of stepper / motor controllers. The module has two modes of operation, frequency and PWM. In frequency mode it will generate a square wave signal at a frequency that can be controlled by the user via a large potentiometer dial. In this mode there are 3 frequency ranges which can be selected by a jumper (see below). In PWM mode the module will generate a pulse width modulated signal with a duty cycle set by the potentiometer. There are also two latching switches that allow a user to enable/disable the motor output, and a motor direction control. The module also has two power input ranges allowing it to be powered from a very broad power supply range.

Please note: This module is intended to be used in conjunction with a motor driver, it cannot be used for driving a stepper motor directly. When using the 12V to 160V supply input option,the 5V to 12V terminal must be left disconnected.


Connections:

Image

12V-160V................DC Supply input: high voltage
GND........................0V Supply input

5V-12V....................DC Supply input: low voltage
Com Anode..............Output for motor drivers with opto-isolated common anode inputs.
Com Cathode/GND.....Output for motor drivers with opto-isolated common cathode inputs.
ENA........................Connects to motor driver enable input.
DIR........................Connects to motor driver direction input.
PUL........................Connects to motor driver clock/step input.



Example:

Image


Thu Aug 14, 2014 1:05 pm
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Joined: Fri Feb 28, 2014 10:21 pm
Posts: 6
Post Re: Pulse / PWM generator for stepper motor drivers (HCMODU0
Hi, I wired the boards exactly as shown above in the diagram, and after working for a few seconds, the hcmodu0062 went absolutely dead short 0.3ohms.
I found a zener diode that read zero ohms. I have replaced it with a 13v 1.3W and the lights come on now. I will connect it up to the other board and motor again and
see if it works. By the way, I think the original zener was 12v. It went short with 12.2volts from my lab psu. So do not allow the direct input voltage to go anywhere above 12v.
Better still use the regulated input.


Tue Mar 01, 2016 8:51 pm
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Joined: Fri Feb 28, 2014 10:21 pm
Posts: 6
Post Re: Pulse / PWM generator for stepper motor drivers (HCMODU0
I got to replace the zener diode today, and it is now functioning as it should. Its an easy way to test stepper motors and drivers.
regards john


Wed Mar 02, 2016 11:38 pm
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