3.2 beta 2 and 3 strange behaviour during movements

[Touchthebitum]

@Veti said in Nema17 strange behaviour during movements:

the offset is wrong. there is no way a bltouch can be this close to the nozzle.

it has 3.5cm as offset so I think I have to convert in mm (35mm), right ?

[Touchthebitum]

@Veti said in Nema17 strange behaviour during movements:

can you put the motors into spreadcyle and test?

I don't know how which value to change

[Veti]

@Touchthebitum said in Nema17 strange behaviour during movements:

it has 3.5cm as offset so I think I have to convert in mm (35mm), right ?

yes.
what carriage are you using?

I don't know how which value to change

M569 P0 D2
M569 P1 D2
M569 P2 D2
M569 P3 D2
M569 P4 D2

[Touchthebitum]

@Veti said in Nema17 strange behaviour during movements:

@Touchthebitum said in Nema17 strange behaviour during movements:

it has 3.5cm as offset so I think I have to convert in mm (35mm), right ?

yes.
what carriage are you using?

I don't know how which value to change

M569 P0 D2
M569 P1 D2
M569 P2 D2
M569 P3 D2
M569 P4 D2

I use the BLV Hotend Mosquito NF-Crazy BLtouch version.

[Touchthebitum]

@Touchthebitum said in Nema17 strange behaviour during movements:

M569 P0 D2
M569 P1 D2
M569 P2 D2
M569 P3 D2
M569 P4 D2

same results ... still present
I have to try to turn back on 3.1.1 but it is not simple to turn back from the beta. It doesn't connect anymore

[Phaedrux]

In your video your belts look to be very loose which could lead to skipping on the idler teeth. I think that's your main problem.

[Touchthebitum]

@Phaedrux said in Nema17 strange behaviour during movements:

In your video your belts look to be very loose which could lead to skipping on the idler teeth. I think that's your main problem.

Ok, I'll check that. Thanks

[Touchthebitum]

@Phaedrux said in Nema17 strange behaviour during movements:

In your video your belts look to be very loose which could lead to skipping on the idler teeth. I think that's your main problem.

I tried to tight the belts but it is the same. When I move the carriage (printer powered off) with my hand, the movements are smooth.

[Phaedrux]

So the belts aren't flopping around loose anymore?

Can you post a video of the motion now?

It seems mechanical in nature. Check your belt paths closely.

[Touchthebitum]

@Phaedrux said in Nema17 strange behaviour during movements:

So the belts aren't flopping around loose anymore?

Can you post a video of the motion now?

It seems mechanical in nature. Check your belt paths closely.

When I thight too much, I hear mechanical noises. I have to tight a tensioner more than the other one to have a correct carriage symmetry.

[Touchthebitum]

I upgraded to the beta 3 and it seems better.
To be tested

[Touchthebitum]

@Touchthebitum said in Nema17 strange behaviour during movements:

I upgraded to the beta 3 and it seems better.
To be tested

Unfotunately It was a short time success. It still loses steps.
I turned back to 3.1.1 and this time erverything disappeared. No lost steps anymore.

[Phaedrux]

Thanks. I've moved to beta firmware forum for @chrishamm to see.

[chrishamm]

Try to install this experimental firmware build by uploading it on the Files -> System page and then confirm the update prompt. That should get you to RepRapFirmware 3.2-beta3+3-ch (check on the Settings -> Machine page).

Please let me know if that resolves your problem.

[Touchthebitum]

@Phaedrux said in 3.2 beta 2 and 3 strange behaviour during movements:

Thanks. I've moved to beta firmware forum for @chrishamm to see.

@Phaedrux said in 3.2 beta 2 and 3 strange behaviour during movements:

Thanks. I've moved to beta firmware forum for @chrishamm to see.

Thanks