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Heden M28VP servicing.


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#1 Jess Haas SOC

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Posted 12 May 2009 - 01:44 AM

It could all be in my head but I feel like my follow focus motor is noisier than it used to be. I did a shoot recently where I spent a good amount of time in wet environments and where the AC would go past the end stops on the lens when calibrating on a regular basis so one or both of these things could have something to do with it. I plan on opening it up and poking around inside but would like to get some advice on oiling, adjustments, etc... Anyone know anything about the subject?

~Jess
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#2 Nikolay Kerezov

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Posted 15 May 2009 - 02:14 AM

Jess,
I have service this kind of motor twice ,both times the problem was the potentiometer (I've done on "p" model ,but vp is with pot.too).
It's a tricky business,but not so hard to do .You will need very small Allan key I believe was .9 0r .75 mm ,than a 9mm long key(latherman will work too)
Unfortunately the pot. is a bit expensive(will be more than 250usd in US) and hard to find.Here is the model: Vishay Spectrol ; mod. 162-11103 ;res 10k +/-5% ;lin +/- .3%
I'll try to post a pic.
Regards!
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#3 Jess Haas SOC

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Posted 15 May 2009 - 12:54 PM

Was yours getting noisy like mine or did it have other problems? Mine is actually still under warranty so Magnus at Heden said he would take care of it for me same day the only problem is the shipping to Sweden.

~Jess
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#4 Nikolay Kerezov

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Posted 15 May 2009 - 01:23 PM

Was yours getting noisy like mine or did it have other problems? Mine is actually still under warranty so Magnus at Heden said he would take care of it for me same day the only problem is the shipping to Sweden.

~Jess

If it still under warranty just send it.
It is not only the noise,it will start shaking and some big "black holes " in some positions.
The two I have repaired are not mine,but one of mine is going there(I have 32's)
Best!
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#5 RonBaldwin

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Posted 15 May 2009 - 11:06 PM

the only problem is the shipping to Sweden.
~Jess


I say you hand carry it to Magnus and have a great vacation!
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#6 Nikolay Kerezov

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Posted 16 May 2009 - 01:42 AM

the only problem is the shipping to Sweden.
~Jess


I say you hand carry it to Magnus and have a great vacation!

The best advice EVER!
I will look in my equipment for something made around Galapagos islands or the big barrier reef :P
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#7 Jens Piotrowski SOC

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Posted 16 May 2009 - 11:38 AM

I had a motor serviced with Magnus in the past, UPS or Fedex are good options, it takes about 7 to 10 days in all.

I have one of their new digital Motors (Preston compatible) and I love it for it's size and weight.

heden
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#8 Peter Hoare

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Posted 16 May 2009 - 06:49 PM

For reference,

Pot on RS
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#9 Nikolay Kerezov

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Posted 17 May 2009 - 01:32 AM

For reference,

Pot on RS

Hope they have it in stock,last time they didn't.
I'll need one soon :(
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#10 Peter Hoare

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Posted 17 May 2009 - 09:20 AM

This is quite interesting, does this mean that as the pot is limited to 10 turns, the motor is also limited to 10 turns?
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#11 AndreasKielb

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Posted 16 September 2017 - 09:10 PM

My Heden M28VP stopped working today after my assistant connected an old Aaton power cable, which was part of the kid, instead of the actual FOX analog motor cables.

Didn't even notice they had similar connections and that it might be possible to put the 4 pin hirose for power into the motor port.

 

On the Heden site I found out they stopped service for the M28VP in 2016 so I'm a little concerned ( http://heden.se/support/service/ ). Maybe they would repair it anyway but I'll have to wait until monday to find out. Is there another place where I might have it repaired?

 

Meanwhile I had a thought. Maybe there is a safety braker inside the motor which might just gave out due to current on the wrong lines. There was no actual blue smoke or something and also I can't imagine that it's possible to actually kill the internal motor or potentiometer just by wrong electronic connections. The motor would just turn to the opposite direction for reverse polarity, wouldn't it? Possibly destroying the potentiometer mechanically as it hits the end of the 10 turns. But there was no movement at all when he plugged in that cable. It just stopped working. Backup M26P motor still worked with the FOX so it's not the output driver.


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#12 mirko

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Posted 25 September 2017 - 12:55 PM

Contact Carmine zecca in Italy.
E-mail: carmize@hotmail.it he can repair your motor......
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