NOT DEAD YET.
Hi guys,
I've been working on refining an Airborne TT for the past few months and hope to be able to present some ideas soon.
Ciao,😉
Hi guys,
I've been working on refining an Airborne TT for the past few months and hope to be able to present some ideas soon.
Ciao,😉
HI guys,
I have just found this thread and read the first 8 pages then went to the last, so if this has already been posted, please disregard, or better, let me know.
So far everyone has been looking at the platter and bearing issue from the bottom.
My thoughts are how about suspending the platter by the clamp in free air, much the same was at the Shroeder tonearm!
To keep the platter from oscillating, use three motors or 1 motor and 2 idle pulleys. And possibly magnets as well.
The only problem is the top bearing, but I think a big ball bearing in an epoxy air bath may work.
It would be time consuming to change records, but rests could be made 6mm below the platter and as the clamp is unscrewed, it lowers onto the rests.
The platter would have to be perfectly balanced and very heavy but it would be in the DIY KISS principle. And it would be cheap to build as only the platter has the work in it.
Any thoughts?
Mark
I have just found this thread and read the first 8 pages then went to the last, so if this has already been posted, please disregard, or better, let me know.
So far everyone has been looking at the platter and bearing issue from the bottom.
My thoughts are how about suspending the platter by the clamp in free air, much the same was at the Shroeder tonearm!
To keep the platter from oscillating, use three motors or 1 motor and 2 idle pulleys. And possibly magnets as well.
The only problem is the top bearing, but I think a big ball bearing in an epoxy air bath may work.
It would be time consuming to change records, but rests could be made 6mm below the platter and as the clamp is unscrewed, it lowers onto the rests.
The platter would have to be perfectly balanced and very heavy but it would be in the DIY KISS principle. And it would be cheap to build as only the platter has the work in it.
Any thoughts?
Mark
???
Hi Mark,
Glad to see you here.
Do you care to elaboate it more on your idea?
I don't really understand what yo mean.
Thanks,😉
Hi Mark,
Glad to see you here.
Do you care to elaboate it more on your idea?
I don't really understand what yo mean.
Thanks,😉
IT HELPS.
Hi,
A good pic always helps.
Thanks Mark.
Not very practical I think though,you need to do a lot of work to change records that way.
Do you see any major advantages in doing it that way?
Also,may I recommend reading a lot more of this DIY TT thread?
You may enjoy a lot of the efforts of all contributing members,it has been pushed quite far.
You will also find other interesting matter in the entire "Analog" section.
Cheers,😉
Hi,
A good pic always helps.
Thanks Mark.
Not very practical I think though,you need to do a lot of work to change records that way.
Do you see any major advantages in doing it that way?
Also,may I recommend reading a lot more of this DIY TT thread?
You may enjoy a lot of the efforts of all contributing members,it has been pushed quite far.
You will also find other interesting matter in the entire "Analog" section.
Cheers,😉
I have just finished reading all the thread. Lots of work has gone into this project and congrats to all who have built something.
As to my design, It would take the same amount of time to change records as any turntable with a clamp. The platter would have to stop rotating, unscrew the clamp, pivot it away, put on a new record etc.
With three pulleys, stability would not be a problem as the shape of the platter would not induce gyro precession. It would act like a rod. And above all it is simple.
Now all I have to do is find the time to produce a prototype.
Mark
As to my design, It would take the same amount of time to change records as any turntable with a clamp. The platter would have to stop rotating, unscrew the clamp, pivot it away, put on a new record etc.
With three pulleys, stability would not be a problem as the shape of the platter would not induce gyro precession. It would act like a rod. And above all it is simple.
Now all I have to do is find the time to produce a prototype.
Mark
Mark,
Interesting concept. Build it and try!
I am wondering though about the play you have between arm and platter. Even if the platter will run stable it is not rigidly connected with the arm. Or did you solve that already?
Myself, I hope to get mine running this week
Interesting concept. Build it and try!
I am wondering though about the play you have between arm and platter. Even if the platter will run stable it is not rigidly connected with the arm. Or did you solve that already?
Myself, I hope to get mine running this week
No, the arm it is not connected to the platter, one would have to build it to see (hear) how it sounds? Once it is set up, I don't think this will be a problem. The belts will have to be rigid and no stretch, braided fishing line would be good, flexable, stronger than steel and no stretch.
Also the VTA will always be constant no matter how thick the record is, this may be a plus.
Please, keep up the comments, negative or positive as this design is definately outside the square!
Mark
Also the VTA will always be constant no matter how thick the record is, this may be a plus.
Please, keep up the comments, negative or positive as this design is definately outside the square!
Mark
INNOVATIVE DESIGN.
Hello,
Dank je Peter.
I see your TT is almost ready for a spin.
That is is great news!🙂
Hi Mark,
It sure is Mark.
But let's not discourage you,I'm sure we'll all have a lot of questions about the details but for the moment I'll just do a bit of chewing on the concept.😀
Cheers,😉
Hello,
Dank je Peter.
I see your TT is almost ready for a spin.
That is is great news!🙂
Hi Mark,
It sure is Mark.
But let's not discourage you,I'm sure we'll all have a lot of questions about the details but for the moment I'll just do a bit of chewing on the concept.😀
Cheers,😉
To Dice45,
Just wondering, I know this has probably been discussed; but would it be possible to machine the bearing assembly to the tolerances and finish necessary with a CNC lathe?
It's my understanding that most high precision work of this nature is done with a CNC grinder.
Thanks,
Joe
Just wondering, I know this has probably been discussed; but would it be possible to machine the bearing assembly to the tolerances and finish necessary with a CNC lathe?
It's my understanding that most high precision work of this nature is done with a CNC grinder.
Thanks,
Joe
To Dice45,
Just wondering, I know this has probably been discussed; but would it be possible to machine the bearing assembly to the tolerances and finish necessary with a CNC lathe?
It's my understanding that most high precision work of this nature is done with a CNC grinder.
Thanks,
Joe
Just wondering, I know this has probably been discussed; but would it be possible to machine the bearing assembly to the tolerances and finish necessary with a CNC lathe?
It's my understanding that most high precision work of this nature is done with a CNC grinder.
Thanks,
Joe
ALLOW ME PLEASE
Hi,
You can't possibly be aware of it I guess but Dice45 has decided to leave the forum (for a while perhaps).
So,if you don't mind me answering your urgent question...
Yes,a CNC should provide adequate tolerances depending on your
needs.
Cheers, 😉
Hi,
You can't possibly be aware of it I guess but Dice45 has decided to leave the forum (for a while perhaps).
So,if you don't mind me answering your urgent question...
Yes,a CNC should provide adequate tolerances depending on your
needs.
Cheers, 😉
Hey no problemo!
Thanks for replying. I was just wondering because one of my friends has a machine shop. He has all the essentials I would guess: Mazak QuickTurn 20 lathe, Daewoo lathe, Mazak Mill, etc... What he doesn't have is a CNC grinder.
I figured the tolerances could be kept within spec. What I was unsure about was the integrity of the finish. Albeit, none of this was high precision work, most of the machining I've seen on a CNC lathe left a little to be desired in terms of finish. However, I've seen some parts that were CNC grinded (ground?) and they were impressive to say the least.
All this diy TT stuff harkened me back to my LP12 days. Before transporting it you had to remove the platter and the bearing/sub-platter from the bushing.
The bearing assembly consisted of a high strength steel shaft (looked to be precision ground) which was pressed into an aluminum subplatter. The bottom of the shaft was conical, but with a rounded (not sharp) tip. This then slid down into the bushing part.
The tip of the shaft actually rode on the bottom of the bushing. The subplatter, to which the shaft was attached, never touched the bushing. All of this was in an oil bath so I guess the shaft never actually rode on the bushing, but rather it rode on a microscopic film of oil. Talk about economy of thought- it was simplicity at it's finest. However, you could tell it was by no means an inexpensive part.
One idea I have, and I know it probably won't jibe with the conventional thinking of this thread, but why not just source the bearing/bushing assembly from Teres or Origin in the UK? I think the Teres bearing assembly would be superior given the design input so far on this thread- it's used with a high mass platter. I know that would add to the cost, but heh, it's just a thought 🙂
As well, I don't know much about machining costs, but aren't there any standard industrial bushings that could be sourced? That way the only thing you would have to worry about having machined is the shaft; and of course a cup for the bearing to ride in. I guess what I'm talking about is a design more in keeping with the Teres bearing design.
Anyway, thanks for the response. I'll continue to lurk as this project interests me a great deal. I doubt I can contribute much though since I'm not an engineer.
Joe
Thanks for replying. I was just wondering because one of my friends has a machine shop. He has all the essentials I would guess: Mazak QuickTurn 20 lathe, Daewoo lathe, Mazak Mill, etc... What he doesn't have is a CNC grinder.
I figured the tolerances could be kept within spec. What I was unsure about was the integrity of the finish. Albeit, none of this was high precision work, most of the machining I've seen on a CNC lathe left a little to be desired in terms of finish. However, I've seen some parts that were CNC grinded (ground?) and they were impressive to say the least.
All this diy TT stuff harkened me back to my LP12 days. Before transporting it you had to remove the platter and the bearing/sub-platter from the bushing.
The bearing assembly consisted of a high strength steel shaft (looked to be precision ground) which was pressed into an aluminum subplatter. The bottom of the shaft was conical, but with a rounded (not sharp) tip. This then slid down into the bushing part.
The tip of the shaft actually rode on the bottom of the bushing. The subplatter, to which the shaft was attached, never touched the bushing. All of this was in an oil bath so I guess the shaft never actually rode on the bushing, but rather it rode on a microscopic film of oil. Talk about economy of thought- it was simplicity at it's finest. However, you could tell it was by no means an inexpensive part.
One idea I have, and I know it probably won't jibe with the conventional thinking of this thread, but why not just source the bearing/bushing assembly from Teres or Origin in the UK? I think the Teres bearing assembly would be superior given the design input so far on this thread- it's used with a high mass platter. I know that would add to the cost, but heh, it's just a thought 🙂
As well, I don't know much about machining costs, but aren't there any standard industrial bushings that could be sourced? That way the only thing you would have to worry about having machined is the shaft; and of course a cup for the bearing to ride in. I guess what I'm talking about is a design more in keeping with the Teres bearing design.
Anyway, thanks for the response. I'll continue to lurk as this project interests me a great deal. I doubt I can contribute much though since I'm not an engineer.
Joe
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