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Thanks tuxcnc, ya I couldn't get it to work. The final IC's I used was a 26ls32 to single end the differational signal. Into a 74htc14 to boost the signal to 5v. And then into a uln2003 IC to pull down the 12v denford pulses. I was getting a lot of noise. I tried pulling up/down resistors and capacitors to try and negate it. But didnt work. These dm566 drivers seem to work fine with the ec500. I'll have to do some more testing.

I don't understand, I have to create another subject.

Linuxcnc servo cycle is not synchronized with the ethercat cycle. That adds an extra cycle delay.
 

Hi Russell,
please add your config

Cheers Olli

Tengo que cambiar algo en pncconf

(my first post here)

I was given a Grizzly G1006 with a CNC kit.  The previous owner bought the mill new, and did the CNC conversion himself.  And he built the servo control box himself, including the power supply. And he built the pendant control box.  And he built the pendant.

Of course, I didn't know how any of this worked, but I knew I had all the cabling, and the computer.  So I plugged in the things that were obvious.  Then I had to reverse engineer the purpose of the cables that were not obvious. 

It was controlled from a 2003 era computer running Windows 10, and Mach 3.  The parallel port sent commands to a PMDX-122, which sent steps to three Geckodrive G320s. 

Anyway... I got it to move.
youtube.com/shorts/TgeZ-A3zM6M

Now I'm converting it to LinuxCNC.

I have a Mesa 7i96s, that will be replacing the PMDX-122. I have a USB game controller that will be replacing the pendant.
I'm going to try to keep his original servo control box, with his bespoke power supply.  

Grizzly G1006 Mill/Drill
Ballscrew conversion (unknown source)
Ametek 38v 12A servo motors
USDigital encoders (250 step)
Mesa 7i96s Ethernet stepper controller
Geckodrive G320  x3

Thanks to all of you who are building and supporting LinuxCNC. I have found many resources to help get me started.   I'm sure I'll have some questions, and probably a build thread. 

Just wanted to say hi.

Murphy wrote:

I originally had this running on a cheap eBay BOB using the denford drivers. When I switched over to the EC500 I could not get the driver working correctly with the EC500. After many attempts with different IC and board configurations I gave up trying to use the denford drivers and bought DM556T drivers. Still on the denfords motors.
 

The EC500 has strange "differential" outputs 3.3 V.
I don't know any motor controller that has such inputs, but some 5-24 V work.
If problem, I use PC817 optocouplers without any resistors.
They have poor parameters, but only these want to work for me ...

The below is what I use for testing and messing around with Linuxcnc. I'm a little biased towards Lenvo, I have a couple of ThinkPads, 2 ThinkCentres and a ThinkStation. Never had an issue, my T530 ThinkPad is my daily driver.
Lenovo M73 Tower with a i5 CPU (avoid the SFF models)

You'll need a parallel motherboard port cable (otherwise you can't enable the PP in the BIOS) www.ebay.com/itm/256520010767

A small SSD is not a bad idea as well 128GB is enough.

You wont need to do much to your configs, except the small diffs from 2.7 to 2.9.

Log problems should be fixed now

Deleted...

Setting up a machine, have most things going, can see encoders in the test gui, inputs etc.  As soon as I add a bit out to turn on the spindle the compile fails with :

Reading constraint file: "/home/me/riocore/Output/TangNano9K/Gateware/pins.cst"
ERROR  (CT1135) : "/home/me/riocore/Output/TangNano9K/Gateware/pins.cst":54 | Can't find object named 'PINOUT_BITOUT0_BIT'
ERROR  (CT1135) : "/home/me/riocore/Output/TangNano9K/Gateware/pins.cst":55 | Can't find object named 'PINOUT_BITOUT0_BIT'
Physical Constraint parsed completed with errors

As far as I know I am doing as I always have, I did have a few silly mistakes but I have double checked the pin is valid and I tried not naming the plugin to spindle to see if that changed anything but no luck.

Cheers.
Russell.

Note that no axis has jog enabled, you probably need to trace these back
to halui or wherever they are supposed to come from...


29 s32 IN 38852 axis.x.jog-counts <== axis-selected-count
29 bit IN FALSE axis.x.jog-enable <== axis-select-x
29 float IN 1 axis.x.jog-scale <== selected-jog-incr
29 bit IN FALSE axis.x.jog-vel-mode
29 bit OUT FALSE axis.x.kb-jog-active
29 bit OUT FALSE axis.x.wheel-jog-active
29 float IN 1 axis.y.jog-accel-fraction
29 s32 IN 0 axis.y.jog-counts
29 bit IN FALSE axis.y.jog-enable
29 float IN 0 axis.y.jog-scale
29 bit IN FALSE axis.y.jog-vel-mode
29 bit OUT FALSE axis.y.kb-jog-active
29 bit OUT FALSE axis.y.wheel-jog-active
29 float IN 1 axis.z.jog-accel-fraction
29 s32 IN 38852 axis.z.jog-counts <== axis-selected-count
29 bit IN FALSE axis.z.jog-enable <== axis-select-z
29 float IN 1 axis.z.jog-scale <== selected-jog-incr
29 bit IN FALSE axis.z.jog-vel-mode
29 bit OUT FALSE axis.z.kb-jog-active

There is no analog input on the 7I95/7I95T so maybe an
encoder would make more sense for feed rate override.
You could use either one of the high speed encoders or
one of the 4 MPG encoders built into the isolated I/O.

Note the both MesaCT and the very latest pncconf
( in LinuxCNC master ) can make  configurations for the
7I95/7I95T.

Parrallel port has failed on my old computer , running Ubuntu 10.4 and EMC2 2.4.6 . Milling machine has Pico USC , Microkinetics Steppers , Linear Scales for Position feedback.  Old computer is a mishmash of crap that has no network capabilities.
I need the easiest upgrade path , for a computer and Software . Im old and not very tech savy!  I may go to a Mesa board if it would make things easier. Any and all recommendations!

Thanks for the "inmux" hint, it's so true that the 7i95 board has inmux-type input and output pins. Now I have connected the right input pin, and my external emergency stop button is working fine. I have added the following hal command line in my .hal file...

net estop-out iocontrol.0.user-enable-in
net external-estop-in hm2_7i95.0.inmux.00.input-00 => iocontrol.0.emc-enable-in

Let me know if it can be further simplified.

Kindly do me another favor by giving the piece of hal command line to do the x-axis feed override control using an external analog DC power supply from 0 to 10 volts