Testing Mesa 5i25 with 5i25_7i76x2 Setup
01 Dec 2022 12:08 #258206
by holziCNC
Testing Mesa 5i25 with 5i25_7i76x2 Setup was created by holziCNC
Hello everyone,
I am setting up a LinuxCNC system with a Mesa 5i25 and a single Mesa 7i76 to control a CNC machine.
The 5i25_7i76x2.bit is flashed on the card and I have configured a basic setup with pncconf.
Before i plug everything together im would like to measure one of the STEP or DIR signals to confirm it is working.
Is it possible to measure this at the DB25 connector ( e.g. PIN 1) without connecting to 7i76, dose the system need the serial connection to 7i76 to put out the signals?
I have already tried but i couldn't see a signal on any STEM or DIR pin of DB25 while jogging the axles in LinuxCNC.
For measuring i used a logic analyser.
Would be cool if somebody knew if that should work so i know where to search my error.
I am setting up a LinuxCNC system with a Mesa 5i25 and a single Mesa 7i76 to control a CNC machine.
The 5i25_7i76x2.bit is flashed on the card and I have configured a basic setup with pncconf.
Before i plug everything together im would like to measure one of the STEP or DIR signals to confirm it is working.
Is it possible to measure this at the DB25 connector ( e.g. PIN 1) without connecting to 7i76, dose the system need the serial connection to 7i76 to put out the signals?
I have already tried but i couldn't see a signal on any STEM or DIR pin of DB25 while jogging the axles in LinuxCNC.
For measuring i used a logic analyser.
Would be cool if somebody knew if that should work so i know where to search my error.
Please Log in or Create an account to join the conversation.
01 Dec 2022 14:58 #258216
by PCW
Replied by PCW on topic Testing Mesa 5i25 with 5i25_7i76x2 Setup
You can measure the step/dir signals at the DB25 connector, the serial interface
is only used for the field I/O
is only used for the field I/O
Please Log in or Create an account to join the conversation.
01 Dec 2022 15:29 #258220
by holziCNC
Replied by holziCNC on topic Testing Mesa 5i25 with 5i25_7i76x2 Setup
So the Software dosen't check the Serial connection before enabling the steppers as some kind of safety feature?
Then my fault musst be somewhere in my config.
Thanks for the fast reply.
Then my fault musst be somewhere in my config.
Thanks for the fast reply.
Please Log in or Create an account to join the conversation.
01 Dec 2022 16:03 #258225
by PCW
Replied by PCW on topic Testing Mesa 5i25 with 5i25_7i76x2 Setup
If you use any field I/O in your configuration, LinuxCNC will not start
if the field I/O hardware is not detected.
if the field I/O hardware is not detected.
Please Log in or Create an account to join the conversation.
02 Dec 2022 13:57 #258315
by andypugh
Replied by andypugh on topic Testing Mesa 5i25 with 5i25_7i76x2 Setup
You are unlikely to see a step pulse with a meter, you would need an oscilloscope.
If I was wanting a low-level test like this I would simplify down to the very basics and use "halcmd" at the command-line.
At this point, if all it well, the 5i25 should show signs of life (though if it is inside the case you probably won't be able to tell)
You can list all the HAL pins
And there are a couple that can show that things are working OK, the on-card user LEDS.
Should turn an LED on and then off again.
You can now start a stepgen running at a constant rate.
Should set the stepgen running at 10 pulses per second.
To make sure it is running:
If I was wanting a low-level test like this I would simplify down to the very basics and use "halcmd" at the command-line.
halrun
loadrt hostmot2
loadrt hm2_pci
loadrt threads
addf hm2_5i25.0.read thread1 {use tab-completion to get the right function names here)
addf hm2_5i25.0.write thread1
startAt this point, if all it well, the 5i25 should show signs of life (though if it is inside the case you probably won't be able to tell)
You can list all the HAL pins
show pinAnd there are a couple that can show that things are working OK, the on-card user LEDS.
setp hm2_5i25.0.led.CR01 1
setp hm2_5i25.0.led.CR01 0Should turn an LED on and then off again.
You can now start a stepgen running at a constant rate.
hm2_5i25.0.stepgen.00.control-type 1 {set to velocity mode}
setp hm2_5i25.0.stepgen.00.velocity-cmd 10
setp hm2_5i25.0.stepgen.00.enable 1Should set the stepgen running at 10 pulses per second.
To make sure it is running:
loadusr halmeter pin hm2_5i25.0.stepgen.00.countsPlease Log in or Create an account to join the conversation.
02 Dec 2022 13:58 #258316
by andypugh
Replied by andypugh on topic Testing Mesa 5i25 with 5i25_7i76x2 Setup
Oh, and when you are done, "exit" will dismantle the realtime environment and exit the halcmd prompt,
Please Log in or Create an account to join the conversation.
06 Dec 2022 21:20 #258745
by holziCNC
Replied by holziCNC on topic Testing Mesa 5i25 with 5i25_7i76x2 Setup
Verry helpful!!
I guess my Logik Analyzer is crap. I will try the oscilloscope tomorrow.
But turning on LED does work.
I guess my Logik Analyzer is crap. I will try the oscilloscope tomorrow.
But turning on LED does work.
Please Log in or Create an account to join the conversation.
06 Dec 2022 21:39 #258750
by PCW
Replied by PCW on topic Testing Mesa 5i25 with 5i25_7i76x2 Setup
You can set the step_type to 2:
setp hm2_5i25.0.stepgen.00.step_type 2
To have quadrature outputs rather than step/dir
Then you would have a 10Hz square wave on
the step and dir pins, which is easier to see with an LED.
setp hm2_5i25.0.stepgen.00.step_type 2
To have quadrature outputs rather than step/dir
Then you would have a 10Hz square wave on
the step and dir pins, which is easier to see with an LED.
Please Log in or Create an account to join the conversation.
Time to create page: 0.214 seconds