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bigtreetech / BIGTREETECH-S42B-V1.0

The closed-loop drive is to feedback the rotation angle of the stepping motor to the control panel, compare the distance that needs to be rotated with the distance of the actual rotation, calculate the error value, and then compensate, so as to prevent the problem of multi-step and lost step. The closed-loop drive can completely overcome the lost step of the open-loop stepping motor, and can also significantly improve the performance of the motor at high speed
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S42b 1.1 after calibration write 357.7 degrees #46

Open GIANNHSitia opened 3 years ago

GIANNHSitia commented 3 years ago

Hello boys, i bought two S42B 1.1 for my printer. I test both with a nema17 and as after calibration, on screen write rpm 0, error 0 and degress 357.7. I tried many times to do it again calibration but the result is the same. I watched some presentation videos in youtube and saw after calibration on screen write 0 degress. my question is, is it defective or let me fix it. this video shows the problem please check - and the second problem is, when moving the stepper motor, the speed on the screen is 0. some write something

https://youtu.be/cgP7WpYkTbE

GhostlyCrowd commented 3 years ago

In the video you never shut the calibration Dip switch off after you calibrate and reboot and turn the Closed loop dip switch on. So first i would be trying that.

GIANNHSitia commented 3 years ago

Hello, i try, with close loop dip switch OFF, after calibration and i press reset button, on screen the degrees is 0. After this, i turn off the power suppy and i turn the dio switch calibration OFF and the Close loop ON, turn again the power supply on and again write 357.6 degrees. I try and without 3d printer mainboad and is same. I have 2 S42b and present the same. -note, that it works normally I just can not understand what 357.6 degrees means, and if it is normal

I attachment a video https://youtu.be/GVUeH1f0JPE

GhostlyCrowd commented 3 years ago

Hello, i try, with close loop dip switch OFF, after calibration and i press reset button, on screen the degrees is 0. After this, i turn off the power suppy and i turn the dio switch calibration OFF and the Close loop ON, turn again the power supply on and again write 357.6 degrees. I try and without 3d printer mainboad and is same. I have 2 S42b and present the same. -note, that it works normally I just can not understand what 357.6 degrees means, and if it is normal

I attachment a video https://youtu.be/GVUeH1f0JPE

Try Turning Dip 2 on for Closed loop and 1, 3 and 4 off does that work?

Some of these boards seem to have the dips reversed, my V2 are both like this.

GIANNHSitia commented 3 years ago

The dip switch 1 and 2 is the microsteps, 3 is close loop on/off and dip switch 4 is calibration. If dip switch 4 is off i cant calibration. 1 on and 2 off is 16.microstep ( i try 1 and 2 on but is same). Do you can a calibration video with v2 board???

GhostlyCrowd commented 3 years ago

The dip switch 1 and 2 is the microsteps, 3 is close loop on/off and dip switch 4 is calibration. If dip switch 4 is off i cant calibration. 1 on and 2 off is 16.microstep ( i try 1 and 2 on but is same). Do you can a calibration video with v2 board???

IF dip 4 off you cannot calibrate then your dips are not transverse. what happens if you send it a movement command does the red light turn on and the motor fail to move?

GIANNHSitia commented 3 years ago

No no work normal, the red light is off. If i try move the motor with my hand, this return to last position.the close loop working. Mabe the 357.6 degress is the calibration accuracy. 360 degress -357.6 = 2.4/200 step=0.012 error accuracy

linewallker commented 2 years ago

Try to invert enable pin in driver menu, should work