Gallery, Projects and General > The Design Shop
Tacho for mill
jim:
thats a great idea.
i'm now thinking, two magnets (180 deg apart) input 838 (half 1667) and secure with a cable tie. then you've got balance.
i was just thinking i wonder what my mill runs too, Mrs Jim has just reminded me its already got a display :doh: :doh: :doh: :doh:
75Plus:
Here is a deal for a bike computer that has an RPM function although I don't know the max. reading. Under $4 US with shipping included! :clap:
http://cgi.ebay.co.uk/Bike-Bicycle-LCD-Cycle-Computer-Odometer-Speedometer_W0QQitemZ230382322805QQcmdZViewItemQQptZUK_Sporting_Goods_Activity_Monitoring_MJ?hash=item35a3db4475
I have one ordered and will report back when it arrives. My plan is to make a new cap that covers the draw bar nut and mount the computer on it. I will put the magnet/s in the notch/es of the spanner nut that retains the spindle. By doing it this way I can remove the computer and cap as a unit and any flung magnets will stay where I can find them.
Joe
CrewCab:
--- Quote from: boatmadman on October 26, 2009, 02:22:21 PM ---The machine has had a drive belt conversion fitted, so I was wondering if this is the result of the conversion.
--- End quote ---
I believe so Ian
On the video Low range is @1500RPM, that's a little lower than you've found, high about 4000RPM, I never used the high speed :bugeye:
Hope all is well and your having fun.
Dave
CrewCab:
--- Quote from: CrewCab on October 26, 2009, 05:21:08 PM ---
--- Quote from: boatmadman on October 26, 2009, 02:22:21 PM ---The machine has had a drive belt conversion fitted, so I was wondering if this is the result of the conversion.
--- End quote ---
I believe so Ian
On the video Low range is @1500RPM, that's a little lower than you've found, high about 4000RPM, I never used the high speed :bugeye:
Hope all is well and your having fun.
Nice idea about the tacho :headbang:
Dave
--- End quote ---
boatmadman:
Jim,
securing with a cable tie might not work, you have to get the pickup really close to the magnet to get the reading. Maybe some tape on the spindle to protect it, then a blob of glue to help hold the magnet to the spindle - will try this when I get up tomorrow.
2 magnets might be a good idea actually, it will give better low speed readings.
Ian
One other interesting function of the computer is that you can see how far the mill has travelled while standing stil!!
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