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I updated with buildbot2 today and Cut Recovery is working again. Thanks.

sharp_reaper wrote:

Connected the shield only on the 7i96s side in the pin TB2.9 with the GND cable.

Shield should be wired to control box ground, not Mesa board.
When checking encoder velocity, does the value move up(or down?) consistently? Not jumping values?

First, make sure the drive is set to step/dir control mode.

Hello,

I have built a rather large 3 axis CNC mill some years ago, using LinuxCNC/Axis on a standard PC, Step/Dir pulses via parallel port communication, a basic 5-axis BOB and 4 Delta ASD-A2-0743-M with Delta motors. The machine has been working reliably for some years, and although aware of the limitations of this setup, I was quite happy with it. Then one of the Delta drives failed by the end of December, and I'm now trying to fit in a replacement part.

The new drive is the same, brand new, exact reference. I was able to swap the unit and plug it exactly like the old one. I had a back-up of the parameters file last in use on the old drive, that I have uploaded to the new drive with ASDA Soft 5.5.0. I got a warning that the firmware on the new drive was more recent than that in the file (V4,052, Sub:2 ---->>> V4,061, Sub:340), and the soft offered to upgrade the file before uploading it. In the end, it seems that 2 parameters (P2-95, P2-97) were added, with default values.

Problem is that I can get the axis moving through the JOG screen in ASDA Soft, but not with LinuxCNC jog : the position displayed on the screen changes, but the machine's axis does not move, and the motor makes no noise at all (there is no feedback from the drives to LinuxCNC due to parport limitations).
When I have tried to Home All axis, the Z (vertical) and X (gantry, 2 drives/motors) were OK, but the Y axis, that of the new drive, keeps "moving" virtually on the screen while nothing actually happens on the drive (?) and motor.

I think, but I'm not quite sure, that the machine's axis moved on the very first attempt, albeit in the direction opposite to expected.
I dont' get any error code on the drive's panel, and no errors in LinuxCNC either.

I have probably missed something basic, but I can't figure out what. Any idea ?
Thank you for reading this far, any help is appreciated.

Thanks Chris! Designer now detects the linuxcnc plugins!

You can add a PktUART to any Mesa (or other hostmot2) card
Its not the same as SmartSerial. To use Mesa Modbus you must
have a RS-485 interface (with RX,TX, and TXEN pins on the FPGA side)
 

Hi is the engine running ? now what have you set

Thank you for sharing, very easy to setup!

Yes, I'm still around...

Cheers

Thanks very much Tommy.

I'm so hopeless when it comes to the backstage programming stuff I figure I'd better help out where I can.

How can i use PKTUART with 7i80hd?
Include smartserial funtion in bitfile and use a ttl to rs485 converter module?

I think this is long overdue:
Spumco, thank you for all the help you dispense on this forum, and especially, thank you for putting me to shame every time you reply with your very organized and well formatted replies. Not an easy task given the editor is fuzzy.
Some examples of replies:
forum.linuxcnc.org/qtpyvcp/46414-probe-b...tion?start=40#316101
forum.linuxcnc.org/qtpyvcp/54126-probe-b...ratic-probing#312029
forum.linuxcnc.org/10-advanced-configura...nger?start=10#311151

So I was able to double check for short/faulty cables on P1. I've disconnect the encoder connector from 7i96s and no contact to GND.
Made the change of the location of the THCAD board to the outside of the plasma source in a plastic box.
Connected the shield only on the 7i96s side in the pin TB2.9 with the GND cable.
When I turn on QTPlasmaC the value of Arc Voltage is 145.
The encoder velocity pin seems to be working fine on halshow.

What you recommend to do?

Thanks in advance, really don't understand what's happening.

Glad you got it working, but i have to ask, why python?

Sounds like stepper resonance to me.

Without knowing anything about your drives, motors, or mechanical components... an easy test would be to increase the drive's microsteps and adjust the STEP_SCALE accordingly.

Your STEP_SCALE for X&Y is ~14, and Z is ~20.  This seems extremely low for a typical 5mm or even 10mm pitch ballscrew assembly with 1.8 degree steppers.  Maybe I'm missing something.

You did mention that you've adjusted the drives microsteps, but have you tried all (or some) available microstep values?  What value(s) do you have the drives set to now?