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post your config files without them there isn't any way to identify the issue(s)

yep, already had that thought with the 4-jaw chuck route. the pneumatic idea will require different jaws for different material size but those could be made as well. that's the easy part. figuring out how to put it all together and not break the bank in the process is the hard part any kind of hollow body design for something fancy gets expensive quick the bigger you get.

I'm trying to get my head around the calculation of the shortest suitable step length/space timings for the Delta B3 servo drives I'm using.

The manual for the servo drives lists the following specification:

 

I have the drives set to 10 000 steps per revolution and I'm using 5mm pitch ball screws with a 2:1 belt reduction.

My goal is to have a rapid speed of 8 000 mm/minute on the X/Y axis. In order to reach that speed with the current number of steps per revolution I have to set the step timing to the following values:

DIRSETUP   = 800
DIRHOLD    = 800
STEPLEN    = 700
STEPSPACE  = 700

My question is how do I calculate how much safety margin these values leave me given the specifications of the Delta B3 servo drives?

I assume the Mesa 7i96s card I'm using will not be the limiting factor.
 

Thank you for your reply.

This is the latest version of you ds402.comp file?

forum.linuxcnc.org/ethercat/47358-kollmo...over-ethercat#279190

As an added bonus I just added Next Previous buttons for a stacked widget so you only need two buttons for unlimited number of pages.



JT

Moved to QtPyVCP section.

The problem I see is unless it can be used to only make a select obscenely rich people even richer it
is kept locked away from the general public's view.

  Usually when I 3D print stuff I will make a pocket for a nut to either be pressed in or slid in place. That way if I have
to scrap the part I can recover the metal nut back out of it. I do understand though that their are times when that
simply isn't possible.

Lower-case INI file variables are OK in most circumstances.
For example adding this into the Touchy GUI init code (I just happened to have that one in the editor, not a special choice)

And inserting this in the corresponding INI file

Gives this result
So lower case INI variables work in the general case.

But it seems that they do _not_ work in the case of G-code INI-file access.
This is probably because all G-code is lowercased before being sent to the interpreter. And then the bit of the interpreted that reads #<_ini....> variables explicitly uppercases them.
github.com/LinuxCNC/linuxcnc/blob/master..._namedparams.cc#L222

So, the actual situation is that if you want to read an INI variable from G code it must be capitalised, because case info is lost during the process of interpreting the G-code, and the interpeter assumes capitals.

To answer a question from the original posts, you can create a set of global parameters with particular values in the STARTUP_GCODES (would need to be a custom code or subroutine call, though).
But reading from the INI is probably best, accepting the limitations discussed here.

The first video really didn't show the steps to create a stacked widget page change buttons very well.



And I added a screen shot to the docs
gnipsel.com/linuxcnc/flexgui/controls.html#stacked-widget

JT

edit
If write 256(dec) to hal pin opens
and if write 512(dec) to hal pin closes
Also works function 16..

How to write values 256 and 512 to hal pins need a python script to convert boolean value to 16bit hex ?

for testing, you could also use flood and mist coolant pins so you can turn on and off within linuxcnc. That's what I do.

You could make up some machined blocks for your 4 jaw to hold rectangular tube centrally. eg 3" x 2" would need 2 x 1/2" blocks to make it a square.

been looking into this and i think it can be done but it is not cheap project off the shelf options are either through the roof in price or yet to be discovered. even making the stuff myself is going to be expensive by my standards and could see costing around $400 per chuck. So that being said i think i will start with a rotary union to see if i can pull that off and go from there without that the whole idea goes out the window