Hello,
Let me explain !
On cards with the TB6600 there are microswicht to select the microstep mode, whole steps, half steps, quarter steps .... and this up to 32 microsteps!
With the 8825 or 4988 drivers, the three ms1 ms2 ms3 inputs are available and are controlled by Astroeq!
For sidereal speed this does not pose any problems, you just have to configure the number of microsteps on the TB6600 with the microswicht and configure Astroeq for the right speed!
For goto, it's Astroeq which changes the state of the ms1 ms2 ms3 inputs on the 8825 or 4988 drivers, but it can't do it on the TB6600!
I already asked the question on another discussion post but remained unanswered .. !!
It would be necessary to remove the microswicht on the TB6600 to be able to control them with Astreq by pulling connection wires, but the problem is that the high or low control states do not correspond with the 8825, even when mounting three state inverters logic in the outputs it would not work, the solution is therefore in changing the lines of code in the Astroeq program and that I do not know how to do, which is a shame, because we could have a very very efficient system without having to go through 8825 which in the end only apply to 3D printers.
We could also use TB6560!
I also found Sanken integrated circuits very efficient up to 3A and very easy to wire!
To have a very complete system, a small utility to configure the ms1 ms2 ms3 commands would be a total success!
Here we are trapped in the 8825!, Personally I think it would be time to change it given the number of people who had problems!
Good day Sincerely,
Pierre