Jump to content



Photo

Bear-Bel gimbal


  • Please log in to reply
8 replies to this topic

#1 Sebastian Geret

Sebastian Geret

    Advanced Member

  • Sustaining Members
  • 41 posts
  • switzerland/europe

Posted 24 April 2007 - 04:13 AM

Hi all...

does a Bear-Bel gimbal that fits a master post on a EFP post?
need a quick answer thanks

sebastian
  • 0

#2 Imran Naqvi

Imran Naqvi

    Advanced Member

  • Sustaining Members
  • 221 posts
  • London. UK

Posted 24 April 2007 - 07:51 AM

Unfortunately not. The Master like the later Ultra posts are, from memory 1.58 inches. However check with Baer Bel to see if their gimbal can fit a 1.5 inch post with different spacer or grip.
  • 0

#3 Jason Torbitt

Jason Torbitt

    Advanced Member

  • Sustaining Members
  • 401 posts
  • Manchester, London UK

Posted 24 April 2007 - 02:58 PM

I'm assuming that this is with regards to the gimbal which is currently on ebay?

It looks interesting. Does anyone know how the Baer-bel gimbal performs? For such well manufactured equipment, it does seem under-marketed. I have the wedge plate, low mode cage, dovetail plates and motor rods from Markus and they are all very well machined and produced, of a very high quality.

I would like to hear more about this gimbal. From memory, I remember seeing pictures of a Master sled with this gimbal, which I think belonged to Guido Lux.

The diameter of the Master post is indeed 1.580".

Cheers (by the way, nice to cross paths the other day, Imran!)
  • 0

#4 JobScholtze

JobScholtze

    Advanced Member

  • Sustaining Members
  • 1361 posts
  • Netherlands

Posted 24 April 2007 - 05:53 PM

I have spend a hole day at markus his place checking out his rig before i bought the mk-v nexus. I have used 2 gimbals. 1.5 and 2 inch posts, different battery setups etc etc. I think that markus is a great guy, makes great stuff, and did i mention hes a great guy?
But to be honest, the gimbal i was using couldnt get the dyamic balance. We spend some time to try to adjust it, but no luck. Now, 2 or 3 month ago markus told me that he changed the design or bearing. I dont remember wich one he mentioned. But all should be good now. I am sure that if you need support, he is the man. His rig wasnt for me, but thats personel taste.
  • 0

#5 Eric Fletcher S.O.C.

Eric Fletcher S.O.C.

    Advanced Member

  • Sustaining Members
  • 2922 posts
  • LA, Ca

Posted 24 April 2007 - 07:11 PM

But to be honest, the gimbal i was using couldnt get the dyamic balance. We spend some time to try to adjust it, but no luck. Now, 2 or 3 month ago markus told me that he changed the design or bearing.



Unless he had a HUGE axis mismatch you should be able to get the rig to spin flat. After all a flat spin is the pan bearing only
  • 0

#6 JobScholtze

JobScholtze

    Advanced Member

  • Sustaining Members
  • 1361 posts
  • Netherlands

Posted 25 April 2007 - 12:33 PM

But to be honest, the gimbal i was using couldnt get the dyamic balance. We spend some time to try to adjust it, but no luck. Now, 2 or 3 month ago markus told me that he changed the design or bearing.



Unless he had a HUGE axis mismatch you should be able to get the rig to spin flat. After all a flat spin is the pan bearing only

Well, that could be, i am no expert on machining. It took 2 ops and markus some time adjusting to get it close. But like i said, he changed bearings or the design and all shuld be good now
  • 0

#7 Jerry Holway

Jerry Holway

    Advanced Member

  • Sustaining Members
  • 737 posts
  • Philadelphia

Posted 25 April 2007 - 01:20 PM

After all a flat spin is the pan bearing only


Eric- you got me thinking... This would be true if we were supporting the sled only with the pan bearing, not the whole gimbal.

Actually, if the handle axis, and/or the yoke axis do not intersect the axis of the pan bearing (even with a small mismatch), you have a static balance "imbalance" - and you will also be unable to achieve dynamic balance.

Dynamic balance is about panning flat at ALL rotational speeds, not just high ones. The forces generated by high speed panning quickly overwhelm the static forces, giving the illusion of dynamic balance.. just wait until it slows down to normal panning speeds; wobble, wobble.

This all suggests first checking your static balance with a long drop time very carefully, including rotating the rig 90º and 180º and checking if all is okay - then IF your gimbal is centered and all is well, dynamic balance your rig. If it isn't....

This is a pretty important concept - I'm going to change the text and instructions in the PRIMER soon to make it "more" clear.

Jerry
  • 0

#8 joe mcnally

joe mcnally

    Advanced Member

  • Sustaining Members
  • 207 posts

Posted 25 April 2007 - 05:29 PM

Hi All
I am a little confused by your problem too.
For quite a few years now Baer Bel gimble has been made with a facility to adjust the axis intersection.
The photo on ebay has these adjustments
There are 6 grub screws to enable this.
Simply backing off one or two screws and screwing in the opposite ones gets you to a perfect intersection.
Helpful when the post is not perfectly circular.
Joe
  • 0

#9 sebastian matthias

sebastian matthias
  • Guests

Posted 02 May 2007 - 03:07 AM

Hi all...

does a Bear-Bel gimbal that fits a master post on a EFP post?
need a quick answer thanks

sebastian


Hello Sebastian

Baerbel used to make also Gimbals for a "thin" post like the Pro or Tiffen. I´m not sure if he still does, but he would make You one if You need it.
As for the dynamic balance problem: there is no problem with achiving dynamic balance with his gimbal ! If the gimbal might have come out of adjustment You can easily readjust it with those little srews in the gimbal:
1. Bring your Rig to static balance
2. spin 180 Degree
3. Open the srew in witch direction the rig lifts up a tiny bit and close the opposite srew for the same amount
4. Use the top stage to bring the rig back to static balance
5. spin 180 Degree

Repeat this steps until the rig stays in balance. Done.

It takes some time and nerves to do this for the first time. Once You have done it a couple of times, it only takes five minutes to adjust the gimbal.




All the best


Sebastian
  • 0




IDX

SkyDreams

Teradek

Betz Tools for Stabilizers

rebotnix Technologies

Media Blackout - Custom Cables and AKS

BOXX

PLC - Bartech

Paralinx LLC

Omnishot Systems

Wireless Video Systems

GPI Pro Systems

PLC Electronics Solutions

Varizoom Follow Focus

Boland Communications

Engineered Cinema Solutions

Ritter Battery