MOHO Explorer

[Angel Rodriguez]

Hi 

Several member have asked about the rod over the hinge on the MOHO Explorer.  It is not there to balance the weight of the coil, since once over the hinge it should not affect the boom's motion.   It is there to sort of as an inertial damper.  Most of the boom's weight is under the hinges and the spring holds the boom in position. Therefore, motion in the long axis of the boom the boom will have a vertical component because most of the weight is under the boom.  And as Dave would say if ;we are making a vertical lets make a goo vertical. 

In the short video I place an explorer on my shake table and move the table along the boom's long axis. You can then see what happens with the brass rod on and off the boom.

https://drive.google.com/file/d/1VGAH0ZFk5Owbl0TC2SjiTrf-

3Zj3D6i9/view?usp=drive_link

As you watch just concentrate on the boom and not the clutter.

As always comment are welcome.

Angel

[John Beale]

Angel:

That is a very impressive video in several ways. One being a beautiful illustration of the physical principle involved, in controlling the cross-coupling of the Z axis with a horizontal one by use of the balanced mass, and another being that you have access to hardware like that shake table which can move so smoothly along one axis only! Logically I understand that such specialized hardware must exist, I had just never seen it before.

regards,
John

[Angel Rodriguez]

Hi John,

Thanks!

I'm not sure how Santa got that thing down the chimney. 

Cheers,

Angel

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