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2008 Maxon Motor Group Buy

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#201
Question....battery recomendation?

Hi Sylvain, is there a particular rechargeable 12V battery you recommend?

Also, I just want to make sure that in the schematic it states that
quote:

"Install VR2-VR3 trimmers 25T or VR3-VR4 Potentiometers 1T but not both at the same time" end quote

But really it should read: Install VR2-VR3 trimmers 25T or VR4-VR5 Potentiometers 1T but not both at the same time"

I got my pcb's & motors (no allen keys) the other day and everything is top notch. The PCB's look amazing!!!

Thanks for your hard work.
FM
 
#202
Forgot to ask

Just out of curiosity....
does the 110191 maxon have enough torque to drive an idler wheel say with a 25 lb platter?

110191 : Stall torque: 51.4 mNm
Nominal torque: 15.0 mNm
Torque constant: 75.2 nMn/A

Not sure which torque value I should be looking at from the data sheet. I will be making a string drive first but perhaps experiment later on.

Thanks again
 
#203
Re: Forgot to ask

fmena said:
Just out of curiosity....
does the 110191 maxon have enough torque to drive an idler wheel say with a 25 lb platter?

110191 : Stall torque: 51.4 mNm
Nominal torque: 15.0 mNm
Torque constant: 75.2 nMn/A

Not sure which torque value I should be looking at from the data sheet. I will be making a string drive first but perhaps experiment later on.

Thanks again
Click to expand...

Mark Kelly would be able to help but I spoke with an engineer at a belt manufacturing company (can't recall esactly who it was) and he calculated the torque values my 110191 put out at both 33 1/3 and 45rpm based on the motor rpm.
It was only 11.7mNm for 33 1/3 and 16.0mNm at 45rpm. I seriously doubt you could power and idler drive design with this motor.
 
#204
Fmena, see page 7 of this thread for answer from Mark kelly and Vinyl Addict on this subject.

To anser your question, the answer is yes, 2X25T pots OR the 1T pot.
1T pot are the prefer option for me because you can fine tune their range of operation using the DIP switch, hence getting a fine adjustment range as the multi-turn pots. the 25T pots mounted recessed can be usefull to prevent speed chnages from children for example.

Thanks, glad you like the kit, have fun.
 
#206
Is there a returns dept?

Algar, thanks for the package, it arrived today BUT:

1. One of the motor tags is missing. I have no '+' tag. If it's a simple case of undoing the 2 small screws and attaching a new one.... no problem.

2. Is there a bill of materials?

regards

Rob
 
#210
The 110191 will run an idler very happily - I've used one in my Garrard when testing my new motor drives. Don't forget that this motor is more than three times as powerful as the original Garrard motor.

The kit drive, however, is not designed to achieve this, it was specifically designed for belt drive TTS. If you want to use the 110191 for an idler you need a much higher voltage. An easy alternative is to use this drive plus the 110189 motor and up the current limit to maybe 500mA (just reduce the value of the current limiter's emitter resistance).
 
#211
Thanks Mark for the information.

Packed 16 kits this evening. All GB members, except Yaki and Zoobird07 should have their kit shipped this weekend.

Sorry for the two last members, since I shipped by error 2 PCB, I'm missing 2 PCB to complete the shipping as well. I should get them back soon and ship them. Sorry again for the delay.

I'll send email once the shipping is done. Check your email. Thanks.
 
#212
Shipped 16 kits. Check your email. Thanks.

Member's kits: dnewma04, Doug Kim, Giordano, Jims, Quan, Lignatorn, Marxist, mikey_audiogeek, mtflycaster, Neil_Kaye, PixelPlay, Spica, Stve Tice, Tnargs, Wirewiggler, ouf...😱


Only kits to complete are for: Ligascon, Paudux, Yaki and Zoobird07, all this because on my error in shipment. Should be resolved soon.

Thanks...Time to return to painting the wall downstairs...
 
#216
Hello,

Shouldn't the collectors of Q3 and Q5 be interchanged?

Also I see no connection of the reference voltage (6.24V) to the upper set of speed selecting resistors.

I'm referring to page 3 schematic of latest ver. 1.5 pdf posted.

Regards,

George
 
#217
Very good gagnou. This is the reason I always include the original schematic when I redraw it 😀 You were right on. I corrected the mistake. Here the new version 2.3. Take note that this schematic was for documentation purpose only, not to create PCB that has no error and is fully functional. I'll post a new documentation with the updated schematic shortly (or rather Bas Horneman will do it for me...)
 

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