New Mill Motor

[Parks]

I should also note that the current setup is temporary. At some point I will make a proper frame.

"At some point" means don't hold your breath

 

[motiondynamics]

Wow, that looks dangerous!

Be careful not to get anything stuck between the chain and the sprocket!
I'd change the ratio of the sprocket on the mill for a 1:1 ratio rather than a 1/4, you lose a lot of speed there!

It's a pretty clever use though!

 

[Parks]

Bah, danger?

I don't plan on actually being too near it when it's running, and it's high enough off the ground to be away from prying little hands and paws...

Changing it 1-1 will 1/4 the torque I'm getting but could be worth a try. Even halving the difference might be good. I just used what I had available, if it wasn't obvious

 

[real_beer]

Yeah, I will see how I go and if I care that it's slow. I don't, at this stage...

I even tried to hold the bike crank while it was going - couldn't do it...

Well done, great work Parks. The speed control is very impressive
It looks a very satisfying & enjoyable experience milling at that speed.
Who's bike did you cannibalise? I hope your missus' doesn't get fat if it was hers :lol:
Please don't check the torque with your hands anymore, its not worth the risk, things usually go wrong way to quick to escape from

 

[Parks]

Who's bike did you cannibalise? I hope your missus' doesn't get fat if it was hers :lol:

Actually, it was the mate who built the mill - has a fetish for ebay and useless crap... Don't worry, I got the missus exercising elsewhere

Please don't check the torque with your hands anymore, its not worth the risk, things usually go wrong way to quick to escape from

I really didn't try too hard, plus I had a handle to hold (not the chain), but true - not something a smart person would do really...

 

[tavas]

You can check the torque by using a standard workshop torque wrench.
Put the wrench on the end of the shaft.
Run the mill.
There is a relationship between the torque of the motor and how far it throws the wrench cross the room. :lol:

 

[real_beer]

I really didn't try too hard, plus I had a handle to hold (not the chain),

The best method to use is the Indiana Jones poke, or it could have been his father's, from "Raiders of the Lost Ark".
It involves a confident well directed thrust with an umbrella into the revolving spokes or sprocket of the intended victim. The ensuing carnage is guaranteed to provide you with a definite result to your test, however even if the umbrella stops the mill in its tracks it will probably not be much good to use as a rain barrier again (and the sprockets & chain could be a bit iffy). The most important part of the procedure from a safety point of view is that you must remember to let go of the umbrella immediately the thrust is completed, this is very important & can't be emphasized enough :lol: .

If you ever decide to dump your mate let me know & I'll apply to adopt him myself :icon_cheers:

 

[Jazzafish]

Got me thinking... might hook my mill up to the Mrs exercise bike! I'm sure she won't mind

 

[Parks]

If you ever decide to dump your mate let me know & I'll apply to adopt him myself :icon_cheers:

Unfortunately he's one of those mates who is more family than friend. We tried for a long time to get rid of him until he got qualified and became useful

If anyone does get desperate for some unique part I can certainly ask him.

 

[Parks]

Just a quick update guys - I bought this 24V 16.6A power supply

http://www.ebay.com.au/itm/270886152530?ss...#ht_7558wt_1148

Wired it up last night and it works fantastically. I was getting sick of having the recharge the car battery (it was a fked battery to begin with) and for $45 delivered I couldn't resist.

I was fairly happy running this motor at 12V but now I can run it at 24V, and the power supply adjusted down to 18V easily plus I still have the PWM control so I am laughing!

Highly recommend this combination