Hi how are you? I am writing to you why I am putting together the rev12 of the PCB.
The issue is that components are missing in the parts xls.
Let's see if any of you can help me.
Thanks a lot.
Now I hope that you put header rises in for the nano and drv8825 chips?
If not, I hope you have not soldered them in yet?
Note that r10 and D3 are meant to be soldered underneath the nano chip, which is why header risers are used,
Hi
It is possible to use a lower voltage capcitor, 16v, and evem go down to 220uf,
The purpose of c3 is to prevent a reboot of the controller when an application or ascom driver connects. It can take a few seconds following a reboot for the controller to respond to requests, which some applications will time out.
I wrote the ascom driver so there should be no issue if you want to leave the c3 capcitor off.
The 28byj-49 12v motor has more torque that the 5V version, but it will run hot, If you have to have coil power On to reduce slippage of the focuser, then you can use the stepper motor to barbeque food - the stepper motor will get very hot.
I dont know what telescope you have or the imaging train (filter wheel, camera etc)
The higher the weight of the imaging train the more torque you need.
the 28byj-28 12v is okay for visual use, but can fail to move a heavier imaging train.
If you are concerned by the weight of the nema motors, this can alwats be offset by rotating the imaging train (a lot of scopes now have this) so the motor is underneath and not out one side, making balancing easier.
Cheers
Robert
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I like that motor, the size it has is ideal.
I have a skywatcher 200/1000 on an azeq6.
If nothing happens, the fuse will arrive tomorrow and I will be able to start the tests.
In the focuser I only have the Canon for now, for another year I will not change to ASI b/w and the wheel.
Thank you very much for your time, I will continue bothering you with my progress and doubts
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hi how are you? I am writing to you why I am putting together the rev12 of the PCB.
The issue is that components are missing in the parts xls.
Let's see if any of you can help me.
Thanks a lot.
Hi Roberto
I have looked in the files directory here, and can only find rev11 pcb. The picture indicates it is rev12, which I cannot find.
Do you have a link where you got the rev12 gerber file from?
Regards
Robert
hi
https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/Gerber%20Files/DRV8825/
Hi Roberto
In the folder above
https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/Gerber%20Files/
you will find the parts list spreadsheet
It is arranged as a series of tabs (at the bottom) so select the one applicable to the gerber you downloaded. which i think was
DRV8825_M-MT-F-BT-12_pcb.jpg
Now I hope that you put header rises in for the nano and drv8825 chips?
If not, I hope you have not soldered them in yet?
Note that r10 and D3 are meant to be soldered underneath the nano chip, which is why header risers are used,
Cheers
Robert
first of all thank you for your help
don't worry, the photo was just to illustrate, everything is already on the zocalo.
I have other questions and the 470uF 35v capacitor is too big to be able to integrate it on the board, what solution did you give?
thank you very much
Hi
It is possible to use a lower voltage capcitor, 16v, and evem go down to 220uf,
The purpose of c3 is to prevent a reboot of the controller when an application or ascom driver connects. It can take a few seconds following a reboot for the controller to respond to requests, which some applications will time out.
I wrote the ascom driver so there should be no issue if you want to leave the c3 capcitor off.
Regards
Robert
A link to the drv8825 motor stuff
https://drive.google.com/drive/folders/1e-MC3jVSdDC397zONZg1E6qWz6-qn4dM?usp=sharing
Last edit: brownrb 2022-04-01
Right now at home I have 16v 220uf and 25v 100uf
thanks for the videos
Last edit: Rofear 2022-04-01
could the 28byv-48 12v motor be used with this mount?
I am sure what is being asked?
The 28byj-49 12v motor has more torque that the 5V version, but it will run hot, If you have to have coil power On to reduce slippage of the focuser, then you can use the stepper motor to barbeque food - the stepper motor will get very hot.
I dont know what telescope you have or the imaging train (filter wheel, camera etc)
The higher the weight of the imaging train the more torque you need.
the 28byj-28 12v is okay for visual use, but can fail to move a heavier imaging train.
If you are concerned by the weight of the nema motors, this can alwats be offset by rotating the imaging train (a lot of scopes now have this) so the motor is underneath and not out one side, making balancing easier.
Cheers
Robert
I like that motor, the size it has is ideal.
I have a skywatcher 200/1000 on an azeq6.
If nothing happens, the fuse will arrive tomorrow and I will be able to start the tests.
In the focuser I only have the Canon for now, for another year I will not change to ASI b/w and the wheel.
Thank you very much for your time, I will continue bothering you with my progress and doubts