Topics

11

Modbus / send DRO to LCD

« on: August 26, 2009, 12:27:53 PM »

please help me
http://www.machsupport.com/forum/index.php/topic,12430.0.html

12

General Mach Discussion / DRO display

« on: August 25, 2009, 04:41:39 AM »

I have decision to show DRO information on LCD screen by using microcontroller and modbus
I have studied PDF files of MODBUS protocol
& also I have enough knowledge about microcontroller  AVR.
Please explain me the structure of this job by using brain

13

General Mach Discussion / change value STEP PIN#

« on: December 19, 2008, 08:48:27 AM »

in "port configuration"   i have changed "STEP PIN" of "X axis" +apply .
but it return to other value.
what problem?

14

General Mach Discussion / l297/l298 with mach3

« on: December 18, 2008, 06:22:23 AM »

the board are my build using L297/L298 and have input for STEP/DIR/ENABLE .
the step motor operation is:when a signal occur on step motor pin,enable pin should be activated
to make motor to start and when the signal is lost,enable pin should be low.

i've got no problem for STEP pins adjusment,and either for DIR  pin,but for ENABLE  pin,it is always high or low and i can not control it when needed.
when i set ENABLE pin to "1" the step motor works with mach3, but when there is no signal at STEP signal pin,the step motor is still active and it sounds like buzzzzzzzzzzzzz!!
how can i use L297/L298 to drive stepper,they have enable pin and i can not control this pin with my software.

best regard