Micro (Seiki) BL-91 restoration

[J!m]

Got busy today…



I hit the top with#1 steel wool to remove the melted belt remains (it basically welds into the finish). I also made a dent go away. This had been shipped in the past with the platter in place.

Then I gave it three wet coats of the satin clear- only on the top. I masked the sides off.

We’ll see how bad it came out in the morning..,

 

[J!m]

It’s not bad! I think the sheen is a reasonable match. I’ll get it demasked and get some photos.

Meanwhile, I cleaned up the foot cups.



The feet are rubber “bags” with a spring inside. (These guys were clever) I have some more feet inbound from Japan now but those are also used… hopefully I can get four out of the bunch.

I also cleaned up the 45 adapter while I was at it… got a bit carried away I think.

 

[J!m]

I think it looks good enough. There was some checking in the veneer between the arm adapter and the side that pulled in a lot of finish- so it is a bit sunken in those spots, but otherwise, I give this two thumbs up.

I did some minor chip touchups as well, so overall it looks decent.

 

[J!m]

This is where we left off. The motor is lubricated and re mounted, the motor pulley has been polished. Lower control board is mounted and the wiring tidied up underneath. I also started the layout for the voltage switch underneath.

PS I went up to 5.1 ohms on the resistors based on the actual voltage I was getting out of the transformer. I need to verify voltage is correct when the motor is running…

 

[J!m]

Well, I fired it up today. Dropped the spindle into the plinth, dropped on the platter, ran the new belt around and let it run. Both speeds seem to work. Spindle is making a sound that didn’t run in so I’m going to superfinish the shaft. I found the Diamond suspension so I should be able to get 1 micron or better. I’m also going to replace the steel bearing ball with one of my polymer ones. Plus another oil change…

I also modified the steel cover for the bottom to accommodate the voltage switch. Got that painted so it’ll be done tomorrow.

Additional used rubber feet and an original DIN cable are inbound but that’ll be a month probably. I’ll get the bearing done next week and then get back onto the Rega project.

I also need to set the dynamic balance up, or at least see how good or bad it is. I can use the analytical balance we use when we weight pair blades. Measures grams to four or six decimal places. I should be able to dial it in pretty well…

 

[Gibsonian]

Progress. I see a finish line up ahead. Nice work on a classic.

 

[J!m]

Seeing it spinning increased the itch to hear it…

I’ve currently got this Kenwood operating at the absolute limits of its ability and I think it’s going to have its ass handed to it…

 

[WOPL Sniffer]

Jim, what does this mean???


"Spindle is making a sound that didn’t run in"

 

[J!m]

The sound it's making didn't go away after the spindle ran for an hour. So it's not running in.

I need to superfinish the spindle and try again. All I did initially was change the oil, and flip the thrust plate.

 

[J!m]

Bottom cover…


Best I can do on the platter. It had a lot of dings from bouncing off the tonearm… at least the belt remains are gone!

 

[J!m]

Dunamic balance is right on over 2.5 grams, then it starts getting heavy between 2.5 and 3 (which is the top)


Nasty spindle


Un-nastifier juice…


Nearly there…


BAM


I put some shine on the housing too.


polite note…

magic switch!

 

[NeverSatisfied]

Well done…..should be a performer.

 

[laatsch55]

So ...you are building up that shaft a bit with a liquid base?

 

[J!m]

No, removing a micron at a time until it’s shiny.

 

[laatsch55]

Ahhhh.....

 

[Gibsonian]

Smoother then new I'd bet

 

[J!m]

I hope so.

I’ve specified a different oil this time too. It’ll be a few days before that arrives. The polymer ball is already on the way.

 

[bill7621]

Nice work, Jim. That's going to be a fine looking and performing table. It should be for all the work you're putting into it.
What size lathe is that?

 

[J!m]

Thanks!

Which lathe? The small one is a Hardinge second operation lathe. The big one is junk now. Because it leaked, they decided to stop adding oil. Lo and behold they broke the gear in the most useful range… I think it swings 24” (but has a gap bed) and six feet between centers I’d estimate. Metric dials on it make it even less friendly to use…

 

[J!m]

Funny story with the spindle-

I started off with 1000 grit SiC paper and it wasn’t taking anything off… because I still had the new spindle oil in there! It wouldn’t let the paper cut!

Cleaned and oiled with regular oil and it started cutting.

Yes, it’s good oil!!