Some issues I have (Driver and Software)

[cncNovize]

Hello,
first of all I want to thank you for the great work.

I am building my own RS CNC and wanted to test it today (build should be done).
Unfortunately I found two issues I want to tell you:

1. X and Z axes are OK and can drive in both directions.
But Y only can moves towards me and not backwards.
Strange: When I am moving forward it does so. When I am moving backward it drives forward as well.
After driving the motor "backwards" you can hear a noise from the Y-motor itself.
Changing the TB6600 helped out so I think one TB6600 is broken.
May I can fix it myself? Does someone knows this problem?
Or can I only put the driver in the garbage?

2. When I was "playing" a bit with the three axes I stopped and wanted to investigate on problem 1.
Suddenly the Z axis moved downwards on it's own!
The Nunchuk couldn't stop em - only the reset key stopped it.
This could maybe be a software bug.

Thanks!



Greetings from Germany.

Stefan

[RoMaker]

Hi Stefan,

1- Try to invert X and Y drivers and check if the issue is on X axis, if yes, your driver is dead !

2- Wich version of firmware have you ?

[cncNovize]

Hi Romain,

1. Will do it later. But why inverting X and Y? X is fine and the direction is correct. I just don't understand
You mean inverting the directions on X and Y? Or change them one to another?
I already tested the Y axis with the driver from the X axis.
It worked then.
so I think the Y driver is broken.
Or did you suggest another test that I don't understand right now?

2. The latest. Beta V0.95 and Beta V0.6

I also want to introduce point 3:
3. I am not sure but it seems that I can drive the motors to the homing direction even if they are at their homing point (endswitch is pressed).
Wouldn't it be a good idea that (program and nunchuk) the µC first looks if the axis is already at endpoint and only allows driving the opposite direction?

[RoMaker]

Hi,

1- it's just to verify if the driver is defective, if you invert X and Y commands and the problem of Y is found on X after invertion, it is that it does not come from the driver.

3- we are looking at this point on the firmware, like other things, the firmware is still Beta and it makes regular changes.

[cncNovize]

Greetings,

1. I switched the three control pins from X to Y and from Y to X.
X has then exactly the same problems and Y works fine.
So I guess the driver is really broken

3. Sounds great.
Many thanks again. You have done some fine engeneering.
For sure the software will be as good as the hardware soon.
But I wonder that there are such problems as repetier itself is a well tested software.
Of course I use marlin for my 3D-printer but the original firmware was repetier as I know.
If I only could have a deeper look into your changes and modifications.
Such great work deserves help as good as possible .

[cncNovize]

Hi,

well I have received 3 new TB6600.
I tested ALL drivers with my Y-Axis and the problem stays.

Could it be that there is a software error or something?
There cant be all 3 drivers broken

Do you have any ideas?


Stefan

[RoMaker]

Hummm

have you well wired your endstops in normaly closed ?

[cncNovize]

Yes they are.
All is working fine so far.
Just Y wont drive in both directions - just one.



I have tested a lot.
Here are my results for the Y-Axis-Problem:

- When I am using the TFT its just doing nothing at the "wrong" direction on Y-Axis (could be because of non homing before).
- When I am using the Nunchuk it drives just in "the one" direction - even when I control to the other direction.
- The driver is 100% OK because it works on other Axis.
- Even when I invert the direction in the firmware and upload it - it wont change direction it is like no inverting!
- When I change two wires of the motorcable then it changes the direction (but for sure same error with other direction)
- When changing the command cables (pul, dir, ena) to another Axis the Y-Axis works fine with the "wrong pins" then! (Motor, driver and wires are OK).
- I checked contact with my multimeter betwen the three command pins and the driver - OK
- I checked contact with my multimeter betwen the three command pins and the pins going to the µC (the ones that I have soldered myself) - OK.
- I used Repetier-Host to control the Y-Motor: same as with nunchuk - it drives only in "the one" direction. Even when commanding to the other direction.
- Also there is a noise from the motor. In german we call it "Rauschen" ... in french you would maybe say le bruissement or le souffle (I can't french - it's from translator).

Thats crazy... .
I don't know what to do next.
It is frustrating if everything is build and fine - except this Y-Axis.

[Patient0x00]

Is the direction working is away from the switch or towards the end stop switch?

[cncNovize]

At this moment it is away from the end stop switch.
But like I wrote: If I change two wires from motorcable it is towards endstop.