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forum.linuxcnc.org/show-your-stuff/47357...hines?start=0#256463
Attached Messer_big is for 7i95 (not T) and uses encoder feedback and is for plasma, so just take it as a reference to compare to.

I’m trying to test run my new Mesa 7i95t. I am completely new to LinuxCNC but have lots of CNC (and programming/linux experience FWIW). Before I start touching anything in my DIY machine (currently running on FluidNC) I just want to get a single stepper driver to run a single stepper motor so that I can complete the flow end to end. As a sanity check I’ve hooked up a DM556 stepper driver to the card’s stepgen 03 connector (tried both a differential connection and also just connecting PUL- and DIR- on the driver to stepgen’s ground). The stepper driver is powered by a 24v PSU and works perfectly if I just connect its PUL to a pulse generator. The ENA is left unconnected, enabling the driver. I’ve setup the Mesa config with pncconf using 7i76 as the card and then later switched to hm2_7i95.0 in the INI as per the instructions. Assigned stepgen 03 to the X axis. LinuxCNC starts fine, I can unlock the machine and jog, and see the DRO changes values - but the stepper doesn’t move. Looking into the generated HAL file, I see control type set to 1 (velocity and not position? does this make sense for a stepper driver like this)? Also, I see a bunch of pid initialization, and again it’s confusing to me why PID is needed for an open loop stepper driver that provides no encoder feedback to LinuxCNC. What am I missing here? Is there a sample HAL file that works with the 7i95t and a simple open loop stepper driver that I can test? Thanks!

That likely means the 7I77 has been damaged
(or perhaps has very low 5V)

 

With mesa powered and linuxcnc not started aout0 shows 2.8v and aout1 shows 3.3v.
These are the pins going to the drives. On the other free pins we get 3.3v. This is TB5
On TB1 (5v) I get 4.75v. TB5 is powered from the computer psu.
By the way this setup already worked and we did cut 12mm sheets.
On TB8 outpus I don’t see any voltage. I will post the ini and hal file later.
If you have any other debugging steps I’m all ears.
With aout0 and aout1 disconnected when I enable the machine there is no jolt since drives are disconnected but I still get the same error.

I would think the simplest option would be a used PC with a parallel port
and one of those "Mach 5 Axis" parallel port breakouts. 

For a small amount of 5V, a safe option is to just use PC USB power
(which is what the "Mach 5 Axis" BOB does)

The mouse issue sounds like EMI so likely a grounding/line filter issue with the servo drives

Ethernet is much more EMI resistant than USB so that may be a latency issue.

To check network latency, run this:

sudo chrt 99 ping -i .001 -q -c 60000 [card_ip_addr]

Where [card_ip_addr] is either 192.168.1.121 or 10.10.10.10 depending on the 7I76E settings

This will run for 1 minute and print timing statistics
 

ok i missed the 4 lines


setp [HMOT](CARD0).gpio.028.is_output true
setp [HMOT](CARD0).gpio.029.is_output true
setp [HMOT](CARD0).gpio.028.invert_output true
setp [HMOT](CARD0).gpio.029.invert_output true

now i dont need the resistor!

both channels p1 p2 are pullup jumpered


guys! i thank you!

pcw & tommy you are both awsome guys thank you

If you have a 7I92T, you can change the GPIO resistors to be pullups or pulldowns
so for active high devices, you should select the pulldown option.

i saw i my other config that i done it how you said!

its a 7i92
now i have another machine with a 7i92t!

i check before solder action

96GB of ram . Are you streaming the game play at the same time? I wana see.

I try to cross the Optocoupler and reverse the led..

i have a 7i92t

For a 7I92 (not 7I92T) you want the relay to be ground activated
as the 7I92 GPIO has pullups so will be high when LinuxCNC is not
running.

No 7I92 GPIO output will work until set into output mode, in addition
if the output is active low, you will likely want to invert the output
so a high hal signal activates the output. Something like:

setp [HMOT](CARD0).gpio.028.is_output  true
setp [HMOT](CARD0).gpio.029.is_output  true
setp [HMOT](CARD0).gpio.028.invert_output  true
setp [HMOT](CARD0).gpio.029.invert_output  true


 

good question!

#*******************
# SPINDLE
#*******************


# ---setup spindle control signals---

net spindle-vel-cmd-rps <= spindle.0.speed-out-rps
net spindle-vel-cmd-rps-abs <= spindle.0.speed-out-rps-abs
net spindle-vel-cmd-rpm <= spindle.0.speed-out
net spindle-vel-cmd-rpm-abs <= spindle.0.speed-out-abs
net spindle-enable <= spindle.0.on
net spindle-cw <= spindle.0.forward
net spindle-ccw <= spindle.0.reverse
#net spindle-brake <= spindle.0.brake
net spindle-revs => spindle.0.revs
net spindle-at-speed => spindle.0.at-speed
net spindle-vel-fb-rps => spindle.0.speed-in
net spindle-index-enable <=> spindle.0.index-enable

net spindle-cw => [HMOT](CARD0).gpio.028.out
net spindle-ccw => [HMOT](CARD0).gpio.029.out
net spindle-enable => [HMOT](CARD0).pwmgen.00.enable
net spindle-vel-cmd-rpm => [HMOT](CARD0).pwmgen.00.value

setp [HMOT](CARD0).pwmgen.00.scale [SPINDLE_0]MAX_OUTPUT

# ---Setup spindle at speed signals---

net spindle-at-speed <= [HMOT](CARD0).gpio.017.in_not



This is all about it.

BUT the relay works with GND to the IN Pin.

I try to change over cross the Optocoupler pins.
then 5v should activate the Optocoupler.

on a other machine i have a different relay.. this works but need a 220ohm resistor between gpio and gnd to dont activate the relay when linuxcnc is closed..

i read this in the forum anywhere and it works for me.. think when linuxcnc is closed the busdrivers all send high to every gpio. or i am wrong??

thanks

Is the 7I92 GPIO pin driving the relay set to output mode?