2729
I took this current project table (sn 13943) down off the rack and replaced it with my trusty standby, sn 2729. 2729 has been in operation for a few years after complete refurbishment.
Curious about start up times, especially when cold, I observed how long it took 2729 to get up to speed when first switched on. And this one had been standing still for approximately 3 weeks while I've been screwing around with the Papst on sn 13943. It took 15 seconds for the E50 powered unit to get a steady strobe. After that, I switched 2729 off and allowed it a couple of hours to cool. Then I switched it on again. I had a steady strobe in less than a full platter rev!
That seems like proper operation to me. That is why I've been complaining about this Papst and its slow start-up times.
-Steve
I took this current project table (sn 13943) down off the rack and replaced it with my trusty standby, sn 2729. 2729 has been in operation for a few years after complete refurbishment.
Curious about start up times, especially when cold, I observed how long it took 2729 to get up to speed when first switched on. And this one had been standing still for approximately 3 weeks while I've been screwing around with the Papst on sn 13943. It took 15 seconds for the E50 powered unit to get a steady strobe. After that, I switched 2729 off and allowed it a couple of hours to cool. Then I switched it on again. I had a steady strobe in less than a full platter rev!
That seems like proper operation to me. That is why I've been complaining about this Papst and its slow start-up times.
-Steve
A view of my adjustable workbench to set the turntables :
I apologize it is not a TD-124 on it.
Please click on the photo to see it at the correct XY shape.
that looks like a good use of some spare extruded aluminum T-slot materials. A bit too costly for my budget, but I like. What do you do when you want to work on the other side of the Luxman?
Btw, I have a sneaking admiration for that Luxman TT. Nice style to it.
below: some structural extruded T-slot aluminum sources.
Grooved T-Slotted Framing Extrusions by FAZTEK - Aluminum T-Slotted Framing Systems by Zoro Tools Industrial Supplies
Bosch extruded aluminum, aluminum extrusion
I really like some of the implementations I've seen using extruded aluminum with T-slot interfaces. We can even find some equipment racks (high end) using this type of construction. Adona comes to mind.
-Steve
Kevin the speed measurement was done with a 3 khz testrecord and a digital readout W@F meter !
Volken
I assumed you used something other than the strobe.. I was addressing a concern to Steve.. 😀
I stumbled across this thread today in a search related to papst motors.
As hinted at I bought that Papst motor and it now resides in my older bodged together TD-124, the one I mostly use in fact.
I run it on 3 phase power using a Siemens Micromaster 420 driving a sinewave reconstruction filter which also provides roughly 60dB suppression of the PWM waveform on the output. It ended up being the easiest solution to implement.
The motor runs quite a lot better on 3 phase, enough so that I would say there is no point in running it on single phase power. It gets up to speed much more quickly and it's a lot smoother. The fan like roar when it is running is a bit annoying, but I was able to reduce it a bit with sound deadening material underneath the table.
As hinted at I bought that Papst motor and it now resides in my older bodged together TD-124, the one I mostly use in fact.
I run it on 3 phase power using a Siemens Micromaster 420 driving a sinewave reconstruction filter which also provides roughly 60dB suppression of the PWM waveform on the output. It ended up being the easiest solution to implement.
The motor runs quite a lot better on 3 phase, enough so that I would say there is no point in running it on single phase power. It gets up to speed much more quickly and it's a lot smoother. The fan like roar when it is running is a bit annoying, but I was able to reduce it a bit with sound deadening material underneath the table.
I had forgotten about this thread. I've been running this motor for a number of years now and this is the turntable I use on a consistent basis.
On 3 phase power the Papst is largely a winner, it is noisy (wind noise) which I have not so far mitigated much. A new plinth is in the future and with it I think a noise absorbing cup around the motor with sufficient clearance for ventilation.
It comes up to speed much faster than the E50 in the other table under all conditions, and is pretty stable. Still using the micromaster based drive described earlier. I can tweak the frequency as needed depending on brake setting and temperature. Speed stability is very good.
It seems to have similar levels of torque to the E50 but I am running it at 120V on the windings.
Old thread, and I amazed at what I have forgotten. LOL
On 3 phase power the Papst is largely a winner, it is noisy (wind noise) which I have not so far mitigated much. A new plinth is in the future and with it I think a noise absorbing cup around the motor with sufficient clearance for ventilation.
It comes up to speed much faster than the E50 in the other table under all conditions, and is pretty stable. Still using the micromaster based drive described earlier. I can tweak the frequency as needed depending on brake setting and temperature. Speed stability is very good.
It seems to have similar levels of torque to the E50 but I am running it at 120V on the windings.
Old thread, and I amazed at what I have forgotten. LOL