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  • Darium
  • Darium
18 Aug 2025 05:26
Replied by Darium on topic scurve trajectory planner

scurve trajectory planner

Category: General LinuxCNC Questions

Hi,
Any update on the project?
  • f355
  • f355's Avatar
18 Aug 2025 05:08
Replied by f355 on topic Z probe and tool setter combo

Z probe and tool setter combo

Category: Basic Configuration

 
Thank you for your reply!

I don't think the GUI and/or the connection method matters much in this situation - it's more of a HAL question than anything else - but if you're curious, I'm retrofitting a Carvera Air desktop mill, details can be found here , it's a bog-standard 3-axis Cartesian machine for all intents and purposes. Probing is the last part before the setup can be called functional.

I don't know what kind of picture would be helpful here, so I'll try to explain better.

The machine has a tool setter/TLO sensor on the bed, it's a spring-loaded button that closes the contact when pressed.
There's also a probe that you clamp in the spindle to touch off the top of the stock, again, it closes the contact when the tip of it is pressed.

I need to measure the length of the probe using the tool setter. If I move the probe down against the button and trigger the measurement when just the tool setter button closes the contact, I get an inaccurate reading - the probe tip requires additional ~0.05mm of travel before it triggers (I'm wondering - is it maybe common to ignore this error? That would explain a lot). So the length needs to be measured when both the probe and the tool setter contacts close. I can combine the HAL inputs with boolean AND operation, feed the result into motion.probe-input, and it works perfectly.

However, after doing that I need to touch off the stock with the probe, and that quite obviously doesn't work with ANDed inputs - the tool setter button is not pressed when the probe triggers against the stock (unless I reach out and press it down with my hand :) but that's obviously not a solution). The same goes for measuring the end mill length.

I can replace AND with OR, and then I can measure my end mills and touch off the stock, but I lose the ability to accurately determine the probe length, as described above.

I don't mind writing a new HAL component if needed, but I don't know how to isolate the situation of measuring the probe. There's motion.motion-type pin, as I've discovered recently, so maybe I can cook up something based on that, in combination with the fixed tool number for the probe, but I'm not sure if motion.motion-type would be set to 4 (tool change) when tool length measurement is happening, I guess I'll have to experiment.
  • unknown
  • unknown
18 Aug 2025 04:16

getting started , latency and breakout board questions

Category: General LinuxCNC Questions

One should always RFTM, it's a good practice to follow unless you are quite financially well off, have plenty of time to spare and have the patience of a saint.

Or some other poor sod is setting everything up and you have 100% trust in them.
  • PCW
  • PCW's Avatar
18 Aug 2025 03:26
Replied by PCW on topic Simodrive 611

Simodrive 611

Category: General LinuxCNC Questions

Do you have a link to the drive manual or at least the the I/O connections?

You can use MesaCT to generate 7I97/7I97T compatible configurations
plus theres a sample 7i97/7i97t configuration. I think this is in the 7I97T
software support zip file, if not, I can post it here.
  • PCW
  • PCW's Avatar
18 Aug 2025 03:22
Replied by PCW on topic Issues with MESA 7976eu analog-in

Issues with MESA 7976eu analog-in

Category: Driver Boards

Yes, that should be correct.
  • SebastianM
  • SebastianM
18 Aug 2025 01:37
Replied by SebastianM on topic Issues with MESA 7976eu analog-in

Issues with MESA 7976eu analog-in

Category: Driver Boards

Thx, this is how my setup looks like... 



So if I understood your answer correctly - I replace R1 (currently 10k) with 110k, which gives me 10k (110k & 11k in parallel). 
Will try that tomorrow....

thx!!
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