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Good morning. I wanted to ask for clarifications on a problem that I encounter both on a real machine and on sim/axis. The version is 2.9 pre0.
If I command m3 s800 and after g33.1 z-50 k1, the tapping is performed correctly, the spindle turns in m3, stops with deceleration after z-50 and returns to m4 until it exceeds the initial z in deceleration, and then returns to the initial z.

If I command m3 s1000 and after g33.1 z-50 k1, the tapping is not performed correctly, the spindle turns in m3, the z reaches -50 and no longer returns to z +, I send back with the spindle rotating.

If I command m3 s2000 and after g33.1 z-50 k2 the tapping is performed correctly, the spindle turns in m3, stops with deceleration after z-50 and returns to m4 until it exceeds the initial z in deceleration, and then returns to the initial z.

If I command m3 s3000 and after g33.1 z-50 k2, the tapping is not performed correctly, the spindle turns in m3, the z reaches -50 and does not return to z +, I return with the spindle rotating.

This value the spindle are on real machine, on sim have value for spindle velocity much hight, but problem is the same .
on linuxcnc 2.9.0 pre0 is the same at 2.10.0-pre0

On fanuc system, the spindle have 2 acceleration value.
One for velocity mode, when work in m3 or m4 and the second accelleration for tapping.

i have test change encoder resolution and mesa card , but the problem not is hw.
some test:
if change acceleration the spindle and is much fast , the m3s1500 is ok.
The acceleration value the spindle change reaction on return the z axis .

because ?

Yes, thank you all for your help, my T420 was the problem, switching to an other PC fixed it

But now i have a new problem

I need this custom pinout on my Card to run my Stepcraft D420

Configuration pin-out:

IO Connections for P2
DB25 pin# I/O           Pri. func         Sec. func        Chan      Sec. Pin func          Sec. Pin Dir
1        0                        IOPort            StepGen         0             Relay 1                   (Out)
14      1                        IOPort            None
2        2                        IOPort            StepGen         0             Dir/Table2             (Out)
15      3                         IOPort           None
3        4                         IOPort            StepGen         0             Step/Table1         (Out)
16      5                         IOPort            None
4        6                         IOPort            StepGen         1             Dir/Table2            (Out)
17      7                         IOPort            None
5        8                         IOPort            StepGen         1             Step/Table1         (Out)
6        9                         IOPort            StepGen         2             Dir/Table2            (Out)
7       10                        IOPort            StepGen         2             Step/Table1         (Out)
8       11                        IOPort            StepGen         3             Dir/Table2            (Out)
9       12                        IOPort            StepGen         3             Step/Table1          (Out)
10     13                        IOPort            QCount          0             Quad-C                  (In)
11     14                        IOPort           QCount           0             Quad-IDX              (In)
12     15                        IOPort           QCount           0             Quad-B                  (In)
13     16                        IOPort           QCount           0             Quad-A                  (In)

IO Connections for P1
DB25 pin# I/O           Pri. func         Sec. func        Chan      Sec. Pin func          Sec. Pin Dir
1 17                             IOPort            None
14 18                           IOPort            None
2 19                             IOPort            None
15 20                           IOPort           None
3 21                             IOPort           None
16 22                           IOPort           None
4 23                             IOPort           None
17 24                           IOPort           None
5 25                             IOPort           None
6 26                             IOPort           None
7 27                             IOPort           None
8 28                             IOPort           None
9 29                             IOPort           None
10 30                           IOPort           None
11 31                           IOPort           None
12 32                           IOPort           None
13 33                           IOPort           None

How do i get a bin File for the 7i92TM to match that?

I happen to like the RPIOS default desktop (LXDE-PI) way better than LinuxCNCs (XFCE or whatever it is) and a host of other reasons, including the Raspis built in touchscreen support and on-screen keyboard. Everything, including wi-fi, just seems to work. Its easy to install LinuxCNC on it. If anyone is interested, I'll start a new thread.

I use a momentary switch and will insert a 4.7 k ohm resistor. Thanks for your help!

You would need to add an external resistor from 3.3V to each input (0 through 7)
connected to a switch, assuming the switch switches to ground (a 4.7K resistor is a reasonable value)

If the switch/button has NO and NC contacts you can do without the resistor, but a normal
SPST switch needs the resistors.

All of the wiring is correct.

I noticed that the led indicator turns on when i power on the machine but when i start the program it turns off. I try to unplug power to the driver while the machines is on and replace it and that turns the led back on. Seems like a faulty driver yeah?

@Coyote no I didn't have any role here. This is all Grotius' genius on display. I got buried under school responsibilities and managing now two businesses so I haven't been too active in machining over the last year

@ihavenofish this is beyond dad joke into grandpa joke territory

@Grotius I have tested the scurve on my machine for motion (although I haven't tested probing/toolsetting/cutting). I somehow managed to destroy a spindle bearing a while back and turn it into a spindle bushing, and I just got a new spindle earlier this week - I should have time to install the  VFD into the electronics cabinet next week and set up the new spindle, and will send some videos of cutting differences once that's done.

Actually the A/B inputs are inverted (which is what you want for an active low home switch input)
But the index input is not inverted.

options:

1. If you have more spare encoder inputs, just use A,B

2. Add 1 or  more  "not" components to invert the polarity of the input-index pin


 

Hi.
So, I tested the scurve with my loop machine for over 18 hourse. No crashes. And I really try to torture it with extreme values. I would call it a sucess and really good coding by Grotius. Well done.

I will go on and do some tests and thinking of backlash compensation this weekend. Have some thoughts but have to figure it out first.

I've tried a bunch of more things. 

I noticed it could possibly be a wiring issue but that just flipped the directions so you'll notice that the scale now has a different sign. I thought maybe i was getting confused by the min/max and it largely operating in the negative domain so I just changed it to operate from 0 ->4 and the max is 4.

I also messed around with the 'home offset' alot. trying 0, 0.1, -0.1, 3.9, -3.9 and no dice, so its now at 0.The last thing i changed was 'home' in the section above as a last ditch effort. I changed it to 4. The logic is when it hits the switch it considers max that it should do its final approach thing, back off then consider that home and set the DRO to 4. This isn't what happens.

 I noticed that when Z is homing, as soon as it hits the switch the DRO changes to zero and not 4. This is the opposite of what we'd expect but clear I've fat fingered something. Attached is the latest .hal and .ini . 

side note: these motors give a lot of vibration and noise at slow speeds but it seems really nice and smooth at higher speeds (over 28 in/min) I'm not homing at these speeds but i don't know if this is just resonance and rattling as i still haven't anchored the machine yet or maybe settings i could look into. 

Aha, no they weren't.
But they are now.
Can now toggle them all to change state, but oddly y-min is inverted, and cannot quite see what I have done wrong there.

Thanks again.

sorry but I'm not very expert, what do you mean by added externally? Can you explain it to me practically? Thank you

Hi KrisJ,

I can at least confirm a pi 5 that is able to find WiFi networks. In my case nmtui did work I chose something I remember was called ‘activate network’ and it would show a bunch (and prompt for password).

With kind regards,
Jairo 

edit: this is on the latest linuxcnc image 2.9.4 by rodw 

Are the encoder inputs for the limit switches jumpered for single ended use?

Inputs 0..7 on the 7I73 have no pullups/pulldowns
so these must be added externally if used with
single throw switches.