Microstepping using spiral search about astroeq HOT 6 CLOSED

The spiral slew is done using Go-To movements. EQMOD has no way of knowing what speed the mount will move for go-to's, so I believe it assumes that it should do it using the high speed slew for which AstroEQ uses a higher torque stepping mode.

Again, the corrections are done in high speed mode as that is what EQMOD asks for.

I will ask Chris to see how EQMOD decides which type of movement to use. The thing is, I don't want AstroEQ to be ignoring what EQMOD is telling it and doing its own thing, otherwise I would add in a check to make AstroEQ use low speed go-to's if the speed is slow enough.

from astroeq.

Hi,

thanks a lot. In my case, switching to a different speed results often in loosing the PEC synchronization (my motors cannot keep up, maybe I have to feed them more current). However, if the EQMOD team asked for hi-speed, there should be a reason, even though at the moment is not clear to me...

from astroeq.

If you go to line 474 of AstroEQ.cpp, you will find the following:

/*if (packetIn[0] == '0'){
    packetIn[0] = '2'; //don't allow a high torque goto. But do allow a high torque slew.
}*/

Try uncommenting that and see if it works better for you.

If it works I'll look at making it a variable set by the configuration utility if the go-to speed is <200x

from astroeq.

Thanks!

I will try it tonight (weather allowing...) and let you know.

Nico

from astroeq.

Hi,

surprisingly yesterday the weather was enough clear for testing! Uncommenting those lines forced both the spiral search and the correction to a lower speed: now I don't get anymore micro stepping switching. In my case, this preserves the PEC sync, so it's a big improvement. However, the speed during spiral searches and corrections is now lower than the maximum speed I have selected (144x sidereal). It is a minor point, but maybe it also could be addressed (maybe user-selectable correction speed?)

Thanks,

Nico

from astroeq.

Once the V7.5 firmware is released (currently in beta on the AstroEQ forum), the option to disable high torque go-to movements is now merged and selectable from the config utility.

It is not possible to set a different go-to speed for the corrections because as far as the AstroEQ is concerned there is no way to tell them apart from normal go-to movements. However due to the option to disable high torque now being present in the config utility, the go-to speed is now calculated to account for high torque being disabled, so you may be able to go faster.

Once the beta testing is done and the v7.5-dev branch merged, I hope to close this issue. If you continue to have problems you can reopen it.

from astroeq.