2. analog
  3. 1378847406

TTW MOMENTUS MOMENTUS "The MONSTER" Rim Drive

I must say interesting indeed - anyone happen to have one or had a listen? Any initial impressions

Some specs ...

- 99.999% pure Copper platter weighs in at 88Lbs 40 Kg's

- Total weight of the whole table tipping the scales of 200-220Lbs

- Bearing Shaft is Pure Micro Grain Carbide .5 inch diameter x 1.5 inches deep

- DC Servo Direct Rim Drive Super Torque with 24,000 pulse drive control (each revolution counts 24,000 points for accuracy and the MOMENT of inertia combined with the rim drive provides perfect rotational accuracy
128x128dev
lewm
12,593 posts
 
Bydlo, You have specifically catalogued all the things that I also do not like about rim drive; I just did not wish to go into gory detail. TTW claims to have addressed at least most of the issues in the Momentus.
buconero117
2,311 posts
 
Is it true that Harry (VPI fame) buys some of his parts from TTW?
bydlo
142 posts
 
Lewm, looking at the rubber on the motor's shaft it does not look like a precisely machined surface, but I may be wrong. I'm also wondering how they engage/disengage the motor?
brf
1,715 posts
 
I would think that with a rim drive o-ring with a durometer of about 60 slightly pressed against an 80lbs platter would cancel out any slight out-of-roundness of the o-ring. But if not, a $25K table should come with a high precision/machined O-ring.

Also, I believe that the table can be easily converted into a thread drive system.
bydlo
142 posts
 
Brf, you can think...when you start to listen&measure it can be adifferent experience. I'd not waste my resources on precisely machined copper plate without a mathing rubber surface...and we haven't touched the motor yet
More to discover