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tangdfx · (This post was last modified: 03-25-2022 12:50 PM by tangdfx.)

Updated.

I use the lipo battery to provide the power.

And the print is works normally.
[attachment=10484]

So tony your guess is right. The stretching is caused by weak power supply.

But these is still something wrong with the PSU.

Enen with the lipo battery which regulate voltage always 5V. The calculator show low power indication. I know the VR2 to adjust but it does not work.

So the defect area is locked to the PSU circuit.

I currently don't know which part is defected.

But I can change them one by one.