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  • djdelorie
  • djdelorie
08 Mar 2025 00:49
Replied by djdelorie on topic Power failure/flicker best practices?

Power failure/flicker best practices?

Category: General LinuxCNC Questions

The 7i76E is in (or eventually will be) the same enclosure (and same power cord) as everything else, except the PC, which is elsewhere. Putting just it (24V) on a UPS would be a technical challenge.
As for the motors, to keep the encoders powered that means another power supply (16V) in that enclosure that needs a UPS, and I'd have to get around to testing the following-error code ;-)
The motor's big power supply has pretty beefy capacitors - so much so that I have a discharge circuit on it's contactor for when I power it down.
My machine homes pretty accurately, at least enough for my purposes (woodworking) so a following error is not much better than a reset.
The spindle vfd is already monitored for faults (modbus).

Now I get to research tiny din-rail UPSs for 24V and 16V... ;-)
  • andypugh
  • andypugh's Avatar
08 Mar 2025 00:30
Replied by andypugh on topic Power failure/flicker best practices?

Power failure/flicker best practices?

Category: General LinuxCNC Questions

Maybe you could power the 7i76E from the UPS too? The spindle VFD can probably handle a sub-second power interruption on the bus capacitors.
The servos may stall, but there is some chance that they might recover position if the encoders remain powered. And if not, then you will get an f-error report, and still have a live system to recover with.
  • djdelorie
  • djdelorie
07 Mar 2025 22:39
Power failure/flicker best practices? was created by djdelorie

Power failure/flicker best practices?

Category: General LinuxCNC Questions

Other than sourcing a 240v/50a UPS, what should I be doing if I'm using my CNC in an environment prone to power flickers?  We had a short outage this morning due to high winds, and often have sub-second "flickers", and I'm worried about running long jobs.
Note: my system was built with forum advice, where a 24v power supply feeds contactors for the motor and spindle power, with estops on the positive side and software-controlled relays on the negative side.  I don't know how long each of the supplies will last without power, but I assume that no matter what the specific value is, eventually there will be outages both shorter than and longer than that ;-)
I do have a UPS on the PC running linuxcnc, but not on the power that runs the Mesa 7i76E board.  I figure worst case, the PC will stop and tell me the line number it was on before all hell broke loose ;-)

So is there anything I can do or change to make dealing with such power flickers/outages less stressful?

(more info: the motors are servos but the drivers are step/dir, and the spindle has its own vfd.  The setup has a single power cord with internal breakers for each power supply)
  • JTknives
  • JTknives's Avatar
07 Mar 2025 21:10
updating to QtPlasmac, copying setting from plasmaC? was created by JTknives

updating to QtPlasmac, copying setting from plasmaC?

Category: Plasmac

I'm starting over with a fresh install of the new QtPlasmaC on a new HD. I'm wondering if there is a way to just copy over my config data as its been so long that all these questions in the pncconf are greek now. Here is my old file 
# Generated by PNCconf at Sun Jan 10 18:01:51 2021
# Using LinuxCNC version:  2.8
# If you make changes to this file, they will be
# overwritten when you run PNCconf again

[EMC]
MACHINE = IMPERIAL_PLASMAC
DEBUG = 0
VERSION = 1.1

[DISPLAY]
DISPLAY = gmoccapy
POSITION_OFFSET = RELATIVE
POSITION_FEEDBACK = ACTUAL
MAX_FEED_OVERRIDE = 2.000000
MAX_SPINDLE_OVERRIDE = 1.000000
MIN_SPINDLE_OVERRIDE = 0.500000
INTRO_GRAPHIC = linuxcnc.gif
INTRO_TIME = 5
PROGRAM_PREFIX = /home/jtknives/linuxcnc/nc_files
INCREMENTS = .1in .05in .01in .005in .001in .0005in .0001in
POSITION_FEEDBACK = ACTUAL
DEFAULT_LINEAR_VELOCITY = 0.250000
MAX_LINEAR_VELOCITY = 1.000000
MIN_LINEAR_VELOCITY = 0.016670
DEFAULT_ANGULAR_VELOCITY = 12.000000
MAX_ANGULAR_VELOCITY = 180.000000
MIN_ANGULAR_VELOCITY = 1.666667
EDITOR = gedit
GEOMETRY = xyz

[FILTER]
PROGRAM_EXTENSION = .png,.gif,.jpg Greyscale Depth Image
PROGRAM_EXTENSION = .py Python Script
png = image-to-gcode
gif = image-to-gcode
jpg = image-to-gcode
py = python

[TASK]
TASK = milltask
CYCLE_TIME = 0.010

[RS274NGC]
PARAMETER_FILE = linuxcnc.var

[EMCMOT]
EMCMOT = motmod
COMM_TIMEOUT = 1.0
SERVO_PERIOD = 1000000

[HMOT]
# **** This is for info only ****
CARD0=hm2_7i76e.0

[HAL]
HALUI = halui
HALFILE = machine.hal
HALFILE = plasmac.hal
POSTGUI_HALFILE = postgui_call_list.hal
SHUTDOWN = shutdown.hal

[HALUI]

[KINS]
JOINTS = 3
KINEMATICS = trivkins coordinates=XYZ

[TRAJ]
COORDINATES =  XYZ
LINEAR_UNITS = inch
ANGULAR_UNITS = degree
DEFAULT_LINEAR_VELOCITY = 0.83
MAX_LINEAR_VELOCITY = 8.3300

[EMCIO]
EMCIO = io
CYCLE_TIME = 0.100
TOOL_TABLE = tool.tbl

#******************************************
[AXIS_X]
MAX_VELOCITY = 8.3333333
MAX_ACCELERATION = 150.0
MIN_LIMIT = -60.0
MAX_LIMIT = .001

[JOINT_0]
TYPE = LINEAR
HOME = 0.0c
FERROR = 0.5
MIN_FERROR = 0.05
MAX_VELOCITY = 8.33333333
MAX_ACCELERATION = 150.0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 10.42
STEPGEN_MAXACCEL = 187.50
P = 1000.0
I = 0.0
D = 0.0
FF0 = 0.0
FF1 = 1.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 0.0
# these are in nanoseconds
DIRSETUP   = 10000
DIRHOLD    = 10000
STEPLEN    = 5000
STEPSPACE  = 5000
STEP_SCALE = 1940.17
MIN_LIMIT = -60.0
MAX_LIMIT = .001
HOME_OFFSET = 0.0
#******************************************

#******************************************
[AXIS_Y]
MAX_VELOCITY = 8.33333333
MAX_ACCELERATION = 150.0
MIN_LIMIT = -26.0
MAX_LIMIT = .001

[JOINT_1]
TYPE = LINEAR
HOME = 0.0
FERROR = 0.5
MIN_FERROR = 0.05
MAX_VELOCITY = 8.33333333
MAX_ACCELERATION = 150.0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 10.42
STEPGEN_MAXACCEL = 187.50
P = 1000.0
I = 0.0
D = 0.0
FF0 = 0.0
FF1 = 1.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 0.0
# these are in nanoseconds
DIRSETUP   = 10000
DIRHOLD    = 10000
STEPLEN    = 5000
STEPSPACE  = 5000
STEP_SCALE = 1940.17
MIN_LIMIT = -0.26.0
MAX_LIMIT = .001
HOME_OFFSET = 0.0
#******************************************

#******************************************
[AXIS_Z]
MAX_VELOCITY = 16.666
MAX_ACCELERATION = 300.0
MIN_LIMIT = -.001
MAX_LIMIT = 4.0

[JOINT_2]
TYPE = LINEAR
HOME = 0.0
FERROR = 0.5
MIN_FERROR = 0.05
MAX_VELOCITY = 8.3333333
MAX_ACCELERATION = 150.0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 10.42
STEPGEN_MAXACCEL = 187.50
P = 1000.0
I = 0.0
D = 0.0
FF0 = 0.0
FF1 = 1.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 0.0
# these are in nanoseconds
DIRSETUP   = 10000
DIRHOLD    = 10000
STEPLEN    = 5000
STEPSPACE  = 5000
STEP_SCALE = 6400.0
MIN_LIMIT = -.001
MAX_LIMIT = 4.0
HOME_OFFSET = 0.0
#******************************************

[SPINDLE_9]
P = 0
I = 0
D = 0
FF0 = 1
FF1 = 0
FF2 = 0
BIAS = 0
DEADBAND = 0
MAX_OUTPUT = 2000
  • tommylight
  • tommylight's Avatar
07 Mar 2025 19:56
Replied by tommylight on topic Finally 7i76EU!

Finally 7i76EU!

Category: User Exchange

eusurplus.com/index.php?route=product/pr...ct_id=96&search=7i73
  • stefan63
  • stefan63's Avatar
07 Mar 2025 19:25
Replied by stefan63 on topic Finally 7i76EU!

Finally 7i76EU!

Category: User Exchange

Any plan to bring those in?
store.mesanet.com/index.php?route=produc...69_70&product_id=116

Kind regards/Stefan
  • emcPT
  • emcPT's Avatar
07 Mar 2025 08:22
Finally 7i76EU! was created by emcPT

Finally 7i76EU!

Category: User Exchange

On transit to EuSurplus (limited quantities):

7i76EU
7i76U
7i84U

we now have a reasonable stock on most of the common boards.
  • COFHAL
  • COFHAL
04 Mar 2025 17:08
Replied by COFHAL on topic Spindle orientation

Spindle orientation

Category: Advanced Configuration

Please try this configuration to orient with servo step/dir, it works for me.

File Attachment:

File Name: tall56orient.ini
File Size:4 KB

File Attachment:

File Name: tall56orient.hal
File Size:12 KB

This browser does not support PDFs. Please download the PDF to view it: Download PDF

  • Piet
  • Piet
04 Mar 2025 07:43
Replied by Piet on topic difference 7i76e and 7i76EU

difference 7i76e and 7i76EU

Category: Driver Boards

thank you, good to know
  • JohnnyCNC
  • JohnnyCNC's Avatar
04 Mar 2025 00:41 - 04 Mar 2025 00:43
Replied by JohnnyCNC on topic Work with probe

Work with probe

Category: Basic Configuration

I’m using the QTDragon_HD UI and Probe Basic with a 3D probe.  Hopefully this may lead you to the Ah ha moment.  All values are in inches.These are the settings I have in my .ini, .hal, and qtdragon_hd.pref files..ini file

[PROBE]
# pick basic probe or versa probe or remove for none
#USE_PROBE = versaprobe
USE_PROBE = basicprobe.hal file

#3D Probe debounce & Tool-Setter-Debounce
setp debounce.2.delay 100 #this sets the delay 100 iterations of the servo-thread
addf debounce.2 servo-thread
 
#3d Probe
net deb-probe-in debounce.2.0.in <= hm2_7i76e.0.7i76.0.0.input-11-not
net probe-in debounce.2.0.out
net probe-in  => or2.probe_in.in1
 qtdragon_hd.pref

[PROBE OPTIONS]
Probe tool = 99
Probe diameter = .138
Probe rapid = 60
Probe feed = 10
Probe search = 30
Probe max travel = .3
Probe max z = .2
Probe extra depth = .1
Probe step off = .2
Probe xy clearance = .25
Probe z clearance = .25
Probe edge width = .2
Calibration offset = 0
Cal x width = 0
Cal y width = 0
Cal diameter = 0

John
  • PCW
  • PCW's Avatar
03 Mar 2025 20:46
Replied by PCW on topic difference 7i76e and 7i76EU

difference 7i76e and 7i76EU

Category: Driver Boards

Note that the 7I76EU does require an up-to-date LinuxCNC version, at least 2.9.3

 
  • Bennett
  • Bennett's Avatar
03 Mar 2025 17:11
Replied by Bennett on topic Fanuc Serial Pulse Coders - Red cap servos, mesa 7i76e, how to?

Fanuc Serial Pulse Coders - Red cap servos, mesa 7i76e, how to?

Category: Driver Boards

The image below is where I'm getting the idea to use Stepgen to convert my fanuc encoder data to AB quadrature for outputting to the drives, but I could use some insight as to whether or not it will function or if I'm missing some important details.. Does anyone know?  



Within the HAL, is there a possibility of connecting the fanuc encoder data position output to the 'position in' port of Stepgen as it runs in quadrature output mode, to then output the quadrature pulses to my AB Ultra3000 drives to provide the position feedback to them? Or is there some major flaw in this concept.. 

Thanks
  • Aciera
  • Aciera's Avatar
03 Mar 2025 09:40
Replied by Aciera on topic difference 7i76e and 7i76EU

difference 7i76e and 7i76EU

Category: Driver Boards

 
  • Piet
  • Piet
03 Mar 2025 09:28 - 03 Mar 2025 09:28
difference 7i76e and 7i76EU was created by Piet

difference 7i76e and 7i76EU

Category: Driver Boards

Hallo, Mesa bietet das 7i76eu als Ersatz für das normale an.
store.mesanet.com/index.php?route=produc...83_85&product_id=399

Kann ich es genauso verwenden wie das normale 7i76?

vielen Dank im Voraus
  • Muftijaja
  • Muftijaja
01 Mar 2025 00:20
Replied by Muftijaja on topic 7i76e - Spindle FWD/ENA ok, but no speed output

7i76e - Spindle FWD/ENA ok, but no speed output

Category: Basic Configuration

Thanks! I just want to prevent current through the spindle coils. I found parameters in the VFD to suppress low frequencies, so I think its solved. Thanks for your hints!
Hanno
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