• These commercial threads are for private transactions. diyAudio.com provides these forums for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members, use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

Turntable Tachometer and motor speed controller

Jump to Latest
#321
scobham said:
Hi Richard, the DIY Group Buy has long since ended (over 18 months ago). There are two options. 1. Someone on this forum has a DIY unit to sell from the Group Buy - they do come up time to time. 2) I made a commercial version that is fully CE approved. You are welcome to purchase one on a trial basis. I won't post the details here as this thread is not for commercial purposes. However, if you send me a PM I will point you in the right direction.
Click to expand...
scobham: Going to send you a PM similar to the above, thanks.
 
#329
Thank you @Zung you appear to have linked a multi core cable.
Looking at Mouser site the max length of this 8pin flat ribbon cable appears to be 305mm:

1659707615718.png


I might just have to look harder or Aliexpress
 
#330
geoturbo said:
Thank you @Zung you appear to have linked a multi core cable.
Looking at Mouser site the max length of this 8pin flat ribbon cable appears to be 305mm:

View attachment 1078324

I might just have to look harder or Aliexpress
Click to expand...
You can get 1M versions. I may have some available - would need to open my stock of the DIY parts as I used to supply external 1m 8P cables with the external 3D printed cases. I will post back and let you know if I find any at the weekend.
 
  • Like
Reactions: geoturbo
#332
I finally pulled my finger out and finished fitting the motor driver board to my LP12. I had also just bought a AI Sole VIII chassis and armboard, thought I'd do it all in one go.

PXL_20230304_140156049.jpg

I incorrectly attached the old Valhalla switch to the board, that didn't go well really, caused all sorts of strange behaviour.

The Sole VIII is a really lovely, solid piece of metalwork, and pretty simple to fit.

After much messing about, I finally settled on a black marker on the outer plater rim. The white one worked on and off, the black one was much more stable. I have bought a hall effect sensor to try inside the platter, but we'll see.

I was originally going to mount the board in an external box, but in the end I went for one less box on the rack.

Everything seems to be working right now. My only gripe is that I have to help the platter get up to 45rpm. If I don't the motor cogs and complains, settling to about 20-25rpm.

PXL_20230304_204702164.jpgPXL_20230304_205201053.jpg

The blue tac is WIP 🙂

Tomorrow I will refit the Mission 774 arm and utter a few swear words trying to get the bloody thing aligned....
 
  • Like
Reactions: Siberia and Packgrog
#334
Hi Chilli,
Well done. I have the same set up as yourself, and extremely pleased with the results.
I installed mine about 18 months ago, The only small problem I had, was saving the settings to the eeprom but Steve quickly sorted it out.

Regards,
Ray
 
Last edited:
#335
scobham said:
Chilli - try increasing the motor drive by 5v first, then add another 5v - that should help with your 45 problems. (don't forget to save the settings). Black label is the way to go on an LP12. I would avoid the hall effect sensor.
Click to expand...
I shall try this 🙂

And I've just noticed the post about adding 1nF caps to U4, I think. Bugger, I missed that post completely. I've not set up the arm yet so not too much hassle to add the caps.
 
  • Like
Reactions: geoturbo
#340
chiily said:
...And I've just noticed the post about adding 1nF caps to U4, I think. Bugger, I missed that post completely. I've not set up the arm yet so not too much hassle to add the caps.
Click to expand...
Thanks for bringing this up @chiily , I am not sure how I missed this.. my board is 2.3c version and very likely received it before September 2020.
I will try this, btw what is to be expected adding these 2 caps?
 
You must log in or register to reply here.
Top Bottom