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here is a youtube video for I think is the originator of the design I based mine off of he also made a
program for generating the G-code to run the thing.  Pretty cool.

 

You have the PID P terms set so high that they will cause oscillation.

You should use 1/servo-period which is the pncconf default = 1000
for a 1ms servo thread rate.

The physical meaning of a 1/servo thread P term is that position errors
are corrected by the next servo thread invocation. A value of 10000
(with a 1ms servo thread rate) means that a sensed stepgen position
error will be overcorrected by a factor of 9, leading to oscillation.

In addition:

setp hm2_7c81.0.dpll.01.timer-us -50

should probably be changed to

setp hm2_7c81.0.dpll.01.timer-us -200


 

Changing the encoders pwm gens and step gens made a HUGE difference...

Not sure I understand why... sounds like I need to do some reading on how that driver or maybe linuxcnc works... recommendations?

My steppers now move... unfortunately they are stuttering and making a horrible noise.... I suspect that is all about tuning the settings. If so can you point me to a document on how to develop the tuning parameters?

THANKS!!

hi...I just installed linuxcnc debian 12 ( bookworm)....had no internet so skipped mirror...now I have connection but do not see how to set up mirror for things I may not have installed as a result on skipping...Thanks,

Rick

Dear colleagues,I´m invoking here the experts in an attemp to make my PC to boot.

I´ve sucessfully installed the newer Linux cnc version (2.9.3), but when booting after the install, I get a message saying "Loading initial ramdisk", then a short message "x86/cpu: VMX outside TXT) disabled by BIOS" and then the screen turns black and it never recovers.

I´ve tried enabling virtualization in the BIOS, just in case. I´ve tried using a different display output connector......still nothing.

The install has been done on a Lenovo tiny M600.What am I doing wrong? I´m about to throw the pc through the window.
Thank you in advance! 

Hi,
I cant understand what options do I have

Currently Im using hal_manualtoolchange for semi manual tool change
I have ATC, but at the moment I dont use slots / pockts, instead Im using go to toolchange XY, ZMax, and change the tool through button on pendant  / QTDragon MDI_COMMAND
But when Im inside hal_manualtoolchange dialog, non of these options works. It blocks any activities

May someone more familiar with QT/LCNC desing point me to the right direction

My sugestion / questions would be
1. Create a custom dialog (if its possible to be an additional to the code / not replacement) with additional button. 
2. Somehow ublock cnc pendant button exceution
3. something better I dont know about

The first problems I see are with your joint/axis assignments and your home sequence numbers.

In your [TRAJ] section of your ini file you have
COORDINATES = X Y Y Z

This will assign joint 0 to the X axis, joints 1 and 2 to the Y, and joint 3 to the Z.
That is perfectly acceptable, but it seems to get confused below that in the Joint and Axis sections of the ini file.

To configure the Y axis to use joints 1 and 3 your would need:
COORDINATES = X Y Z Y

First which joints do you actually have connected to which axis?

2nd the joints that are assigned to the Y axis must be given matching negative numbers for their HOME_SEQUENCE = setting.

If you are wanting the Y axis to home 1st, don't use HOME_SEQUENCE = 0. It is not required that zero is used in the home sequence. For a duel joint gantry axis, use HOME_SEQUENCE = -1 for both of the joints assigned to the axis(or -2, or -3...)

Usually the Z axis is homed first in most configurations to make sure that the spindle is out of the way for the other axis to home later.

If you are using joint 3 as the Z axis I would suggest moving the [AXIS_Z] section down just above the [JOINT_3] section in your ini file.

in your hal file it looks like you have Z connected to joint 2. And I don't see a home switch connection for joint3 (both of the Y axis joints must have seperate home switch inputs from each other.)

It seem to me its would be better to have the released ISO work with RealTek hardware
(which requires the DKMS driver) regardless of possible issue when upgrading the kernel
(which should be a rare operation)

It does not set dia to the tool, not sure if its expected beheavior, but its minor.

Nevermind my last 2 comments. The problem was I was not adjusting the jogging velocity slider in the AXIS GUI. Classic example of "not reading the manual" :/

Depending on if your a controling your servo closed loop or open loop in Linuxcnc. You have to calculate the encoder counts or steps per unit of measure that you wish to use with this joint. The units could be inches, mm or other if the joint is linear, or if the joint is rotary the units would be degrees, radians, revolutions, or other.

If for example this joint is for a rotary C-axis in degrees and your servo motor is closing the loop to Linuxcnc with a 2000 line encoder directly coupled to the motor and the motor is directly connected to your 80:1 gearbox. You would use 2000(4)*80/360=1777.777778 counts/degree. So in your ini file you'd put ENCODER_SCALE = 1777.777778

beside the traditional limit switch for x and z the mpg and step speed control   i need another  44 digital input and 27 digital  output  that means  2 7i84 
in the description of the 7i84 i see "The RS-422 interface at 2.5 MBaud is compatible with HostMot2s SSLBP smart serial interface which can support as many as 32 7i84 cards for a total of 1024 inputs and 512 outputs"  before you told me  the 7i97t suport only one 7i84 but you can use the  availabe  expantion port and one on the regular port  or both on de expantion port  ? thats not clear  to me 

is it a good idea  to use a separate plc to controle the lathe and let the  7i97 do the nc of the axe ?

Ok, at last. I got ISE running/synth on a Win10 workstation. Never managed to have it working on linux. Tried real hardware (screwed up my installation pretty badly) and neither worked in a VM. Sort of working okay'ish in Win10 although I have no idea how I'll be able to manage a RIO environment (msys64 most likely).

Let's go ghetto! I'll order the aforementioned shilled kit tomorrow and hopefully be spartanized on the verilog side by beginning of the week.

Feeling like going two decades back in time but hey, if that's what works and recommended, so be it!!

Hi Arciera,

cd ~/linuxcnc-2.9.3/cmake/build
remove all items in this build dir.
cmake ..
make -j6
make install 

This will compile tpmod & tpmod_scurve and install them in the ~/rtlib.

For now the tpmod_scurve is a duplicate of tpmod, as the code for the scurve has to
be integrated next week. But nevertheless you can test the build and test if it loads in lcnc.

thanks the user tab works. and I am back on testing.