Hi Peter,
regarding the noise during slew i would like to mention a couple of things:
- it's a self made secondary gear with 15:60 teeth => 1:4 reduction ratio
- it's not yet adjusted perfectly
- it's not yet greased in any way...
@ everybody:
Emphasis of this project is
not building a
low cost telescope drive control.
We like to make it as low cost as possible but you can't get high motor currents and accuracy from cheap electronics.
So you have to calculate around 2 x 65 EUR here in Europe for the motor driver boards. Compared to that the rest like cpu board is not very expensive any more.
There were thoughts about designing a single RA/DEC motor driving board based on a TMC428/429 and two TMC246 for people with less current requirements. This board could deliver up to 1.6A current per motor coil resulting in 2.2A_eff per motor. This would still be enough for a Escap P530 for example. Taking the eagle files form our current board the design would not be very difficult any more and i could also assist a little...
=> until now nobody volunteered to design the board.
Maybe i do it at some time later when all the other software related tasks are done.
Michael