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It isn't that Linuxcnc doesn't do sychronized motion with rotoary axis. Rotary axis are sychronized just fine with linear. The problem is the incompatability of linear feed rate units with rotary feed rate units. The result is often (especially with inches) unexpectedly slow movements when a rotary move is mixed with a linear one. The problem is actually a G-code limitation, rather than a Linuxcnc one. For example you are milling along at F20 inches/min then you throw in a 40 degree move with the rotary. The rotary move is going to take 2 minutes to comple because of the F20, if the same line also includes a 1 inch move, the linear move will be limited to 0.5ipm so that it takes the same 2 minutes to complete. This is where the invers time mode comes to the rescue. it has no unit of measure involved just time. So if you want your 40deg 1inch combined move to move so that the linear component still moves at 20ipm you would specify F code on the line as 1/t or in this case 1/0.05min. or F20.0

You can add a daughter card to the 7I96S parallel expansion port.

You could  use a Mesa daughterboard (a 7I85S  or 7I78 would  add 4 step/dir axis).
You could also use an inexpensive parallel port breakout, like the common Sainsmart 
5 Axis breakout, either ST-V2 or ST-V3 or one of the many  similar parallel port
breakouts. 

easier than expected

blocks.tcl

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If U33 is bad, that's a sign that there a problem with the 5V supply
(possible transient overvoltage) I doubt that the 24V supply is an issue.

this waveshare thing working fine with vivado:
www.amazon.de/dp/B00KM70UFG?ref=ppx_yo2ov_dt_b_fed_asin_title

if you only need to load the bitfile, you can use the installed linux-system.

i know that someone in this forum has running linuxcnc on an raspberry-zero 2 with sdl gui,
this is not so fare away from this cores.

## I actually like vivado. wouldn't it be nice to have cnc modules (step gens, counters, pwm etc) set as ip blocks in vivado so it can be just visual drug and drop to create configuration you need. File Attachment:

hmmm, maybe we can convert some rio plugins into vivado blocks
at the moment the complete rio part is shown as one block in vivado.

Ok. Will try that. Thanks
Would powering the mesa board from an external source for both 5v and 24v and isolating it from the esab power supply a good option to prevent this type of issues?

wow, you made so much progress compared to me! i only managed to boot it and connect to it using ethernet to check that its working. it came with crypto software installed which has web server and dhcp configured so i managed to connect to it via browser using ip address.  
now i am waiting for proper jtag that recognized by vivado to start playing with it. 
i too thought about potentially running linuxcnc on zynq but i suspect those cores are just too slow at 600mhz.
I actually like vivado. wouldn't it be nice to have cnc modules (step gens, counters, pwm etc) set as ip blocks in vivado so it can be just visual drug and drop to create configuration you need. 
 

There is no existing VFD. The spindle motor is a large, old 3-phase induction motor, and it’s currently started using a classic star/delta starter.

The actual spindle speed is controlled by changing gears in the mechanical gearbox. There’s no electronic control involved right now.

I plan to keep the gearbox, but replace the starter with a modern VFD. That way, I can at least get rough electronic speed control, without trying to replace the entire spindle drive system on such an old machine.

I tried setting up extra joints but am struggling to run them in gcode with custom M codes. Does anyone know the best way to do this? Just need to home and move into position.

I wanted to add that my machine also has a parallel port available, if that would help

Hi Everyone, 

I am new here and new to CNC, Linux and Mesa boards, so pls excuse the novice questions.

This is my setup
I have a 5-axis milling machine, which uses 2 stepper motors for the z axis, so in total there are 6 stepper motors. I have also bought a servo motor ECMA-C21020RS from Delta to power my spindle. I have a Mesa 7i96s card

Now for my question
Have I bought the wrong Mesa card for my requirement? From my understanding, the 7i96s can only control 5 motors so my 6 steppers and servo exceed the capacity. If so, what would be the best solution? To buy another card and scrap the 7i96 or is there an option to buy an add-on card to work with the 7i96s?

Thank you in advance for your help

Hi Everyone,

First of all, thank you in advance for your help. I should mention I am new to Linux, new to CNC, and new to Mesa cards. I have been following the tutorial for getting started with the Mesa 7i96s by talla83 en, but I have been stuck for the last couple of days trying to get the Mesa card found using the Mesaflash command but it always says No 7i96s found. I have tried following tutorials for changing the local IP address, thinking there is a conflict as well as changing the jumper on the card to change the IP address but neither have worked. I wanted to put up my settings here hoping one of you will notice a glaring mistake I have made and could point it out. Thanks once again
https://ibb.co/BH9BbB5R

I've been playing with the WLED plugin, got a string of 5 led's working for various things, that is really cool.

I thought I'd try add a blink function to one of them. I see that only the WLED_Expansion allows me to assign an LED from another plugin, but when I try I get the compile error

Procedural assignment to a non register "LED_BLUE" is not permitted.

Any idea what I'm doing wrong

giaviv wrote:

pulse width was already 100,000 ns so that wasn’t the issue.

Was that "base-period" ?
Pulse width is 5000 by default, base period is 100000 by default, if not set otherwise, but base period is only present when you select using a parallel port, and this might have been the issue with stepgen numbering etc...