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Helping a DC motor

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jupiterboy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jupiterboy Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jul 2022 at 3:25pm
Originally posted by patientot patientot wrote:

Originally posted by jupiterboy jupiterboy wrote:

[
Might have to set up a Windows OS on a partition to run software. I can't tell if the shaknspin app is Apple friendly.

My take on the phone apps is that, yes, the w&f is largely useless. That said, I've center drilled a sponge the size of my phone, so that goes over the spindle and under the phone. I'm getting repeatable results, even if less than accurate, so it is a sort of baseline. I still think the phone weight can't be centered, so it probably punishes some bearings more than others. 

Thanks for the leads.



^I think that will work for your apple device? Note that the SNS device is doing the actual measurement, it's just sending info to the app.


Well, I'm getting the "not available in US market message". I'll check on another device. 

Also noticed I've got a good NAB test record with a 3000 Hz 2 minute tone. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote patientot Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jul 2022 at 3:38pm
Originally posted by jupiterboy jupiterboy wrote:



Well, I'm getting the "not available in US market message". I'll check on another device. 

Also noticed I've got a good NAB test record with a 3000 Hz 2 minute tone. 


Weird. IIRC the device works without the app, it's just that you get more detailed data and the ability to export it. Might want to contact the maker.


^They've got a YT channel there with some instructions on the SNS.

However, if you've already got the NAB test LP and a USB audio interface, you may want to try the WFGUI test software first.

Watch the tonearm carefully for side to side movement as it is tracking the test tone. If it moves from side to side at all, that means the record is not properly centered and it will throw off your results.
Reflex M + PSU-1 used with AT150-40ML, AT VM95ML, Stanton 680mkII + Ogura, and Shure M35X cartridges.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jupiterboy Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 2022 at 6:46pm
Thanks all. I've got a Windoze partition and WFGUI set up. Now I need a tonearm. May check with Igor the table designer to see if he thinks this 200mA Slee power supply would work.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 2022 at 7:05pm
A more stable supply rail should help the dc motor stabilise its speed and be immune to mains fluctuations I suggest.. I once had an Ariston with a dc motor and it was okay once it was running. My Gorbe has a dc motor with a power circuit using discrete parts on a circuit board. Prone to overheating till I added heatsinks to the main transistors and inverted the case. I have considered switching to a programmable IC lIke the 317 with a 33/45 switch where one speed preset pot is always in circuit then a second is added in parallel. Never got round to it!
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jupiterboy Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 2022 at 9:31pm
Originally posted by Fatmangolf Fatmangolf wrote:

A more stable supply rail should help the dc motor stabilise its speed and be immune to mains fluctuations I suggest.. I once had an Ariston with a dc motor and it was okay once it was running. My Gorbe has a dc motor with a power circuit using discrete parts on a circuit board. Prone to overheating till I added heatsinks to the main transistors and inverted the case. I have considered switching to a programmable IC lIke the 317 with a 33/45 switch where one speed preset pot is always in circuit then a second is added in parallel. Never got round to it!


For the moment I've ordered a new wall wart that's not multi-country. I think most of them are 5% tolerance, which is not all that great. Maybe some ferrite chokes and better oil will improve things marginally. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 09 Jul 2022 at 7:38am
That sounds promising. Please keep us posted.
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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