why i can not use the simulated 3rd order control on my reprapfirmware board?

[gong yi (K-Pax)]

But the full 3rd order control and simpleScurve work ok.  I use the STM32F407VGT6 MCU.

[Jan]

This exception is generated if you have any fields on the Interpolation
section on the Advanced Settings tab of a GCodeAsyncDriver unset.

Jan

> --
> You received this message because you are subscribed to the Google
> Groups "OpenPnP" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to openpnp+u...@googlegroups.com
> <mailto:openpnp+u...@googlegroups.com>.
> To view this discussion visit https://groups.google.com/d/msgid/
> openpnp/0e566db4-07bf-4042-89cb-461e071ee1b8n%40googlegroups.com
> <https://groups.google.com/d/msgid/
> openpnp/0e566db4-07bf-4042-89cb-461e071ee1b8n%40googlegroups.com?
> utm_medium=email&utm_source=footer>.

[gong yi (K-Pax)]

ok, thank you, I will change the driver to GCodeAsyncDriver. But I can not find the line in issues&solutions anymore. I do not know why.....

btw, is the Full3rdOrderControl better than simulated3rdOrderControl ? If it is, I will keep using this type.

[Jan]

Full3rdOrderControl is for controllers that support 3rd order control
(feedrate/acceleration/jerk) while Simulated3rdOrderControl simulates
simulates it on controllers that only support 2nd order control
(feedrate/acceleration). Please see
https://github.com/openpnp/openpnp/wiki/GcodeAsyncDriver#motion-control-type
for details.

Jan

On 07.01.2026 02:03, gong yi (K-Pax) wrote:
> ok, thank you, I will change the driver to GCodeAsyncDriver. But I can
> not find the line in issues&solutions anymore. I do not know why.....
>
> btw, is the Full3rdOrderControl better than simulated3rdOrderControl ?
> If it is, I will keep using this type.
>
> 在2026年1月6日星期二 UTC+8 21:53:05<Jan> 写道：
>
> This exception is generated if you have any fields on the Interpolation
> section on the Advanced Settings tab of a GCodeAsyncDriver unset.
>
> Jan
>
> On 01.01.2026 13:24, gong yi (K-Pax) wrote:
> >
> > Snipaste_2026-01-01_20-21-53.png
> >
> > But the full 3rd order control and simpleScurve work ok.  I use the
> > STM32F407VGT6 MCU.
> >
> > --
> > You received this message because you are subscribed to the Google
> > Groups "OpenPnP" group.
> > To unsubscribe from this group and stop receiving emails from it,
> send
> > an email to openpnp+u...@googlegroups.com
> > <mailto:openpnp+u...@googlegroups.com>.
> > To view this discussion visit https://groups.google.com/d/msgid/

> <https://groups.google.com/d/msgid/>
> > openpnp/0e566db4-07bf-4042-89cb-461e071ee1b8n%40googlegroups.com
> <http://40googlegroups.com>
> > <https://groups.google.com/d/msgid/ <https://groups.google.com/d/
> msgid/>
> > openpnp/0e566db4-07bf-4042-89cb-461e071ee1b8n%40googlegroups.com
> <http://40googlegroups.com>?
> > utm_medium=email&utm_source=footer>.

>
> --
> You received this message because you are subscribed to the Google
> Groups "OpenPnP" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to openpnp+u...@googlegroups.com
> <mailto:openpnp+u...@googlegroups.com>.
> To view this discussion visit https://groups.google.com/d/msgid/

> openpnp/6759859f-e23b-47c8-b692-c8552cd00dfdn%40googlegroups.com
> <https://groups.google.com/d/msgid/openpnp/6759859f-e23b-47c8-b692-
> c8552cd00dfdn%40googlegroups.com?utm_medium=email&utm_source=footer>.

[Alex]

Boards with the grblHAL driver. grblHAL 3rd order acceleration jerk control.

среда, 7 января 2026 г. в 12:26:59 UTC+3, Jan:

[gong yi (K-Pax)]

It is working now, and it feels the movement is smoother than before.