Re: [CAD_CAM_EDM_DRO] Machine mounted Tachometer with Surface Meter Per minuteThis

Dan,
Many of us use routers with no outside pulleys that the sensors could
attach to.
Would you know of any way to measure the actual speed of routers?
Gaston

On 2010-09-06 12:56, danmauch wrote:
> This tachometer hassingle/dual sensor reflective tachometer using a micro controller to read the speed in RPM of various type machines.
> As you probably know the stated RPM on many machines is not the actual speed because many imported motors were designed for use with 50 Hz mains. When used with 60 Hz the speeds are off by quite a bit. Even on 50 Kz mains the RPM's on the machines charts are usually not accurate. Additionally, some machines have complex pulley ratios. It is also annoying to have to raise the belt guard to see where the belt is installed on the pulleys.
> This high tech tachometer eliminates that problem. With the use of a reflective optical sensors no special code wheel is required. Just a piece of reflective tape place on the outer diameter of a rotating pulley or spindle is needed for the tachometer to read the RPM.
> Furthermore, this tachometer can help spot problems like a drop in RPM as a cutter gets dull. But wait there's more. This microcontrollers has an SMM feature that after reading the spindle RPM can tell you what the surface meters per minute it to aid in deciding the cutting rate. This feature works with both lathe and mills. The Metric Surface Feed per Minute scale for the following 3,5,8,10,12,16, 20, 25,30,50,100,125,150,175,200,250 diameters of millimeter cutters/stock. An inch version is also available. The Tach provides the RPM and then as you select the diameter of the cutter/stock by pressing a single button. The large LCD display shows the Surface Meters per Minutes
> Another feature is that this little tachometer works like a charm on machines equipped with speed controls that don't have a tachometer output. No need to estimate the RPM. You can now read the actual speed. Last the unit is battery powered. The circuitry draws so little current that the batteries will last at least 1 year. There is no wall wart required to power this gem. Just 4 inexpensive AAA batteries are needed to run it.
> If interested in either a kit or an assembled unit contact me off line at
> dmauch@...
> www.camtronics-cnc.com
> home of the low cost cases for gecko drives,
> kits and assembled cnc units.
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