Help with tube bending machine

[MWF FEED]

Hello people

I introduce myself, I am gustavo. I have a problem with a hydraulic bending machine,
the 2 "steel tubes come out without problems but the 2 1/2" and 3 "tubes have a terrible result,
the same happens with the stainless steel in 2". I enclose some images so that you can see my problem,
your advice is greatly appreciated as to why this may be happening to me.


Greatings

http://thumbs.subefotos.com/16a1b80cf0dbe1f78803d978fff9aa10o.jpg (https://subefotos.com/ver/?16a1b80cf0dbe1f78803d978fff9aa10o.jpg)
http://thumbs.subefotos.com/d151d0c90e5b96d53c34692718b7f6b8o.jpg (https://subefotos.com/ver/?d151d0c90e5b96d53c34692718b7f6b8o.jpg)
http://thumbs.subefotos.com/cb05e82bf16edccc8724c9229073f666o.jpg (https://subefotos.com/ver/?cb05e82bf16edccc8724c9229073f666o.jpg)
http://thumbs.subefotos.com/0a846fd8e37aef4f2d0b452186218f1eo.jpg (https://subefotos.com/ver/?0a846fd8e37aef4f2d0b452186218f1eo.jpg)

Best regards from chile


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