Good morning the best community ever!!!
I have a question about the power of pulse's for external drivers.

I'm working with 2 steppers and I want to use same wearing from board (step/dir/e/p) to 2*external drivers. I want to control both with the same signal and I need to keep the max power for both.

I know that each external drivers have own power needed for each motor. But the signal from board, could have less voltage if I divide it ? So maybe I will have issue with loused steps?

If not, so I can connect infinite motors (with external drivers each one) for same axis without problems?

Very grateful for your communication.

Thanks

Hello, I'm using RRF about a year or more. But I have no idea about how it works inside.
For example, I studied robotics and I know about the existence of the matrices (DH, Trans, Rot...)
My question is: did RRF use these parameters? There is Kinematics and dynamics matrixes?

How I can learn how RRF works from inside? I want to know all about internal folders, I want to understand the programs inside.
I was trying to found this information in RepRap.org.wiki, but I can't get it.

Does anyone have a source of all this information?

I hope not to disturb

Thanks

@dc42 you are the best!!! Very thankful for your answers, it seems all working correctly!!!
Last question about "S" and "T" parameters from M669, how I can configure then?

@T3P3Tony All my 3 motors are independents:
G1 X10 moves 10mm to outside
G1 Y45 rotates 45 degrees
G1 Z10 moves 10mm up
I did a lot of calibrations moving each motor correctly. There is something that send wrong pulse signal from 1 axis to another.
*PS it did not happen with Z.
*First move of X doesn't move Y. But first move of Y moves a title bit X. Later, moving X there is Y moving too......
I'm ready to by new board if there is no solution.

Hello, I have rare issue:
If I send G1 X10, Y will move a little bit too
If I send G1 Y10, X will move a little bit too
Z is OK
But, If I send G1 H2 X10 or Y10: it will works good (independent). With other words, making "homming" its all OK, but making G1 i have some type of connection.
I checked all wires, I changed drivers and NEMA's..... there is something in firmware maybe?
I was checking contact with multimeter and I checked Vcc with GND: there was sound of contact... I did it witch the power ON.... Probably my board is dead?
*Using DuentWebControl with RRF

Thanks

@dc42, yes I did! I'm sorry for my ignorance.
I have some accurate questions about it:

1. How you can see, my Rmax=400mm and Rmin=100mm from the center of rotation. But at 100mm from this center, I have "X_end" => H100.
   So, It's correct M669 K7 R100:400 H100?
   Or It should to be M669 K7 R0:300 H100?
2. If I have TB6600 drivers configurated by micro-stepping, I understand that I no need Snnn and Tnnn (segmentation), true?
3. In a sample, you don't have M208 for Z axis. I think that its necesary here.
4. About the interface, I don't khnow softwares that can manipulate "donut_print_zone", should I send Gcodes manually (in cartesian coordinates)?

I hope I'm not disturbing you so much... I really need to get it for my university project. I've been with this for a long unsuccessfully.
When I finish it, I would like to reward you for your help!!!!

Good morning everybody. I'm making a polar printer, where X is angular mov and Y,Z are lineal. Is not the turntable, its "turnbody" machine.
Looking for a Z=0 plane, we have some type of a "donut" print zone. (Ej: Dint=10cm; Dext=40cm;) I think that the coordinates origin of cartesian / polar sistem are the center of the machine.
In config I have M669 K7 .... but I dont khnow to make correct configuration becouse I have different design.

@dc42
Okey, to begin with a big thanks for your attention!!!

My next questions about polar kinematics are:

1. How I can define the rotative-origin of the rotative axis (≈center of the bed)?
   It's my biggest mystery... In polar we have max and min radius, and the center is in the middle.
   But I have my min_rad at 10cm from my real rotatory center and max_rad at 30cm from it. My case is a donut work zone (or just part of it, 90deg for start )

2. In the rotative axie, where do we use mm and where degrees?
   In config.h there is only mm (ej: M566, M92) so I can understand that in M208 we should to write Y__mm instead of Y__degree.
   But at the homing files we are working at degrees.
   So I need to calculate mm from degrees? How I can take step/mm for rotative axie?

3. If I use external drivers, should I use M350, M906, M84?

4. There is core files I should to check exept homing files?

Waiting for a response

Sincerely

Alexander

@dc42

Correction:"One for rotatory base" => Rotation is not in the bed, is in the body. Like a crane for buildings.
Your link is for a turntable bed and not for the body. Can I use it anyway?

Isn't the same angle in 2 cases, or yes? Because the centers are not in the same point. In my case the center = origin of the sistem/body. ( At the polar center of bed ≠ center of the body)

How I can change the angular axis from bed to body?
Thaks for your fast answer, I really need it!!!

Hello everybody! I'm building my own 3D printing robot. I will use RRF and I'm new in this world.
So my design is pretty simple, 3xNEMA23 with TB6600. One for rotatory body, other for Z axis and the last one for radial distance. Its something like a prismatic robot + SCARA.

My question is: Can use one of the existing kinematics or I should use M669 for a "Robot Printer"?
I have already calculated the H-D parameters for it and I obtained the following table:

Art    Theta    d    a    Alpha
1         q1    0    0      0            ; base with rotation (max 90deg)
2          0    d1   0      0            ; the Z linear axis (max 20mm)
3          0    0    d2   pi/2           ; the r linear axis (max 200mm)

The first one is the base.
With these parameters, how can I define the M669 command? Should I put variables or a numerical value.

I will apreciate any advice or help.

Thaks everybody.