# DELTA_EFFECTOR_OFFSET Question

Posted by disneytoy
 DELTA_EFFECTOR_OFFSET Question December 16, 2013 12:45AM Registered: 13 years ago Posts: 138
From Marlin configuration.h

// Horizontal offset of the universal joints on the end effector.
#define DELTA_EFFECTOR_OFFSET 30.0 // mm

The distance from the pivot point of the Rod to the center of the Jgead on the end effector is 30mm.

Do they mean the mid point between the two parallel rods? If so it should me 17.5mm.

This is not proportional but which measurement is correct?

 Re: DELTA_EFFECTOR_OFFSET Question December 16, 2013 04:53AM Registered: 11 years ago Posts: 732
Quote
disneytoy
Do they mean the mid point between the two parallel rods? If so it should me 17.5mm.
Yes, the distance from the effector center to the middle point of the two pairs of u-joints is the right one.
 Re: DELTA_EFFECTOR_OFFSET Question December 16, 2013 12:18PM Registered: 11 years ago Posts: 106
good reference image

 Re: DELTA_EFFECTOR_OFFSET Question December 16, 2013 01:29PM Registered: 13 years ago Posts: 138
My only concern about that diagram, is the DELTA EFFECTOR OFFSET goes from the ro pivot point, to the next axis pivot rod . But wouldn't the Centerline be th absolute center of the effector? I think that drawing is inaccurate.
 Re: DELTA_EFFECTOR_OFFSET Question December 16, 2013 02:38PM Registered: 11 years ago Posts: 106
In the picture it goes from effector center to the middle point of the two pairs of u-joints.
 Re: DELTA_EFFECTOR_OFFSET Question December 16, 2013 03:06PM Registered: 11 years ago Posts: 106
 Re: DELTA_EFFECTOR_OFFSET Question December 16, 2013 03:21PM Registered: 11 years ago Posts: 106
Quote
disneytoy
My only concern about that diagram, is the DELTA EFFECTOR OFFSET goes from the ro pivot point, to the next axis pivot rod . But wouldn't the Centerline be th absolute center of the effector? I think that drawing is inaccurate.

Remember that the effector base is triangular so it appears off center in the side view...

 Re: DELTA_EFFECTOR_OFFSET Question December 16, 2013 03:50PM Registered: 13 years ago Posts: 138
Very helpful information. Thank you. Will have my arms fiished maybe tomorrow. Getting closer!!!

Quote
ddseeker
Maybe this will be clearer...

John's 3DR “Simple” Delta Printer Firmware Settings
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