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Things I noticed in stable version .


Would it be possible to add a confirmation dialog box prompting the user before initiating another homing cycle .

When I run the program and want to pause it midway through the G-code execution to clean the machine from chips, it doesn't allow me to manually move the axis.
I believe the program should allow pausing, during which I should be able to manually move or return the axis. When I choose to resume the program, the machine should automatically return to the position it was in before the pause and continue execution from that point.
Also, if I stop the spindle and start it again, the speed is much lower than before.

When you're in the G-code editor, it's possible to start the program execution, but if you exit the editor, the program stops .

1. download Ubuntu 10.04 with LinuxCNC from here
www.linuxcnc.org/iso/ubuntu-10.04-linuxcnc3-i386.iso
2. write it to USB drive, google howto with Rufus
3. boot the PC from that USB
4. click on "try Ubuntu"
5. open a file folder, on the left find the internal HDD and click on it, on the right find /home/whatever_user_name_was_on_it/EMC2/configs
6. copy that config folder to another USB drive or a phone or external HDD
7. open that configs folder on the internal HDD, open the config inside, right click on the file with .ini extension, choose "open with" and type emc2, press enter
8. does the machine run?
If all is OK, remove the other USB or phone or external HDD, and proceed to install Ubuntu.
After restarting use the other USB or phone or external HDD and copy the configs folder where it was, start it as in point 7, or use the CNC menu and click on "create desktop shortcut" after you choose your config in the config picker.

Alright, it seems to running ok now and the tuning worked exactly how you described.
FF1 is just right at 1 and the p ended up about 5x what it was before.
Thank you

Try another network cable, kinked or nicked or stepped on cables can cause issues. Also some cheap cables will cause a lot of headaches, sometimes even not so cheap ones as i had a brand new never used cable that would absolutely not connect to Mesa. I did cut it into many tiny pieces Over 30 of the same brand worked fine.

Pinned for easy finding.
Thank you.

Ok,I will give it another shot.
I appreciate the help.

Set ferror and min ferror to 5 or so and then tune FF1 then P.

Note that if previous PWM scale was 10 (so the output would be scaled in volts)
changing it to ~50 makes the P term need to be 5 times higher for the same effect

For tuning, use halscope and plot  joint.n.ferror and joint.n-vel-cmd
if FF1 is too low, the following error during a constant speed jog
will be in the same direction as the velocity, if FF1 is too high, the
following error will be in the opposite direction of the velocity.

For P, I would just increase until you get oscillations, then back off about 50%

 

If I set output_scale to 52, I immediately get following errors even with a ferror of .5.
The motor wants to drift.
I had it working, but not great with the output_scale at 10.


[JOINT_1]
TYPE = LINEAR
HOME = 0.0
FERROR = 0.5
MIN_FERROR = 0.05
MAX_VELOCITY = 5
MAX_ACCELERATION = 10.0
P = 0.1
I = 0
D = 0
FF0 = 0
FF1 = 1
FF2 = 0
BIAS = 0
DEADBAND = 0.003
MAX_OUTPUT = 0
ENCODER_SCALE = 960
OUTPUT_SCALE = -52.35
MIN_LIMIT = -3.0
MAX_LIMIT = 300.0
HOME_OFFSET = 0.0
HOME_SEQUENCE = 3

Looks like a maybe a major EMI or grounding issue.
Your odd voltmeter reading also suggests this.

Are the step/dir drives near the 7I96S?
How are step/dir wired to the drives? (single ended or differential)

Long story short , new to me, milling machines built around 2006-2010 . Computers are password protected ( guy was a real tinfoil hat )  I have issues that i can not rectify with out killing the install anyhow.  Only input to the computers is USB , no disc drives , no ethernet or modems. 
     The original install is emc2 , 2.4.6 , Ubuntu 10.4 , Kernel 2.6.32-122-rtai . Computer is Intel Atom 1.66GHZ , 800MHZ Memory , 2048MB RAM.
Is the computer good enough for modern version? 
          I have all the pin maps for the machines. Most of the Schematics . Any recommendations would be great , this crap is so old , no one can gi

 What is the safest and Easiest to install . just keep it simple for an dummy!
Just tired of wasting time with this , Im Not a real computer expert either . Appreciate the help guys .

Thanks all for the insightful inputs!

I did as suggested, scrapped old config and created a new one using Mesa CT with the suggested home settings.
All golden now! (I had been going around in circles before...).

Opto switches - I had not considered the scenario where the LED had deteriorated, considering now putting some good old fashioned limit switches in, and using the opto for homing only (they have great repeatability).

Now to make some chips - I have 3D printed prototype hardware for the ball screw mounts (using ASA with 100% infill), now to see if I can coax them to at least center drill the parts in aluminum, after squaring up with Z physically locked and taking very cautious lateral cuts.

Yes,  so as a starting value, your ~52 analog scale setting  and
FF1=1.0 is at least a reasonable starting point.
 

10 turns is about 10.4~" and my calculated is 10.47".
Encoder scale set to 960 is perfect.

OK that makes more sense on a plasma machine

If you are uncertain with your gear ratios, can you
rotate the motor shaft say 10 turns and measure
the linear position change? getting this right is needed
for the encoder scaling as well.




 

Pues estuvo cortando durante un tiempo pero se a vuelto a quemar hay algún problema pero no se que es

Hay un pequeño punto en U5 el que cambie antes también lo tenia aun que cambia los dos