Optimizing TMC Parameters

[Sineos]

I have been playing around with the analyzer and Klipper. I was using different TMC settings like driver_TBL, driver_TOFF, driver_HEND and driver_HSTRT and the information in https://www.trinamic.com/fileadmin/assets/Support/AppNotes/AN001-SpreadCycle.pdf
Whereas these parameters are suitable to make the stepper sound like a dying alien, I could not see any striking differences in the visual representation of the analyzer app.

Did anybody have more success or any pointer to share? I have been using my cheap oscilloscope to this end already but was hoping for a more straight forward opportunity.

[zapta]

When you use your oscilloscope, did you measure current or voltage? It's possible that the voltage has different patterns or frequencies but they result in a similar current pattern because of the large ratio between the voltage (chopper) frequency and the stepper's cycle frequency. Having the noisy JLCPCB sensors doesn't help either to see tiny current patterns. Zapta.

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On Mon, Jun 26, 2023 at 1:03 AM Sineos ***@***.***> wrote: I have been playing around with the analyzer and Klipper. I was using different TMC settings like driver_TBL, driver_TOFF, driver_HEND and driver_HSTRT and the information in https://www.trinamic.com/fileadmin/assets/Support/AppNotes/AN001-SpreadCycle.pdf Whereas these parameters are suitable to make the stepper sound like a dying alien, I could not see any striking differences in the visual representation of the analyzer app. Did anybody have more success or any pointer to share? I have been using my cheap oscilloscope to this end already but was hoping for a more straight forward opportunity. — Reply to this email directly, view it on GitHub <#7>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQVMQMFRUIT5TLAL33JPLDXNE66DANCNFSM6AAAAAAZTZBQEU> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[Sineos]

I was measuring current and voltage but due to the fact that my oscilloscope is only 2 channels, it was always a challenge. TBH, I did this once and found it much too involved for the results I was able to obtain.
This does not mean that:

1. One could achieve better results than I did
2. Do it easier

Basically the reason, why I have some hopes in the analyzer and started this discussion,

[zapta]

Edie the Engineer from the Voron team recently had a video that you may find interesting. https://www.youtube.com/watch?v=RWDZLtUeg6o&t=995s

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On Mon, Jun 26, 2023 at 1:36 AM Sineos ***@***.***> wrote: I was measuring current and voltage but due to the fact that my oscilloscope is only 2 channels, it was always a challenge. TBH, I did this once and found it much too involved for the results I was able to obtain. This does not mean that: 1. One could achieve better results than I did 2. Do it easier Basically the reason, why I have some hopes in the analyzer and started this discussion, — Reply to this email directly, view it on GitHub <#7 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQVMQNVIICQYVVPQGPZXOTXNFCYJANCNFSM6AAAAAAZTZBQEU> . You are receiving this because you commented.Message ID: <zapta/ble_stepper_motor_analyzer/repo-discussions/7/comments/6279541@ github.com>

[Sineos]

Thanks. Good explanation, but basically what is in the application note of Trinamic. I was searching for a less complex way :-)

[Sineos]

Do you think this cool piece of hard- / software could be extended to do the process as described in the above linked Trinamic Application Note?
As these stepper drivers are incredibly popular, I think this would be a real game changer to have easy access to such a possibility.