Articles
Products
Resources
About Camtronics
Optical Tachometer
NEW! We have brought out a new machine mounted reflective optical tachometer. Low price great performance. Now with SFM
readouts.
© 2005 Camtronics, inc.
Site by: Digital Platinum
|
|
|||
|
|
|||
|
||||
|
Articles Products Resources About Camtronics |
Optical Tachometer NEW! We have brought out a new machine mounted reflective optical tachometer. Low price great performance. Now with SFM readouts.
|
|||
|
||||
© 2005 Camtronics, inc. Site by: Digital Platinum |
||||
|
|
|
|
|
How often have you wondered what the speed of your mill spindle was?
How often have you wondered what the Surface Feet per minute is?.If you needed to know you would have to lift the cover and look at where the belts were
orientated. Then you need to look it up in the manual or on the chart stuck to
the belt guard and try to figure out the setting. Next you would need to use a
calculator to see what the SFM was compared to the chart speed and the
diameter. Then again there is always the problem that imported motors generally are 50Hz motors and when run at 60 Hz the
speed is quite a bit different. Last, even if you have a hand held mechanical or
optical tach you then have to lift the guards to sense the spindle pulley.
Holding anything near those pulleys isn't safe while the machine is running.
In response to the above problem I have developed together will Alan
a micro controller machine mounted tachometer. It reads from 30-9999 RPM It uses reflective
optical sensors so there is no need to make a disk with a slot cut in it. Simply
place a piece of reflective tape on a flat non reflective pulley or if the
pulley is shiny place a piece of black electrical tape
on the face of the spindle, bend the provided sensor to fit your location
and install the display. As many of you know the RPM on the charts on a mill drill are not correct.
The
mill drill that I have has the speeds for the both 50~ and 60~. Both are wrong
for the 12 speed positions on the pulleys.
I ran some tests today using both the machine mounted tach and a handheld tach.
The chart for the lowest 60Hz speed showed 120RPM
Both the machine mounted and hand held tach read 173RPMs.
At 230 chart it read 286 at 440 chart actual was 497. At the highest speed the
chart said 2500 RPM , Actual speed was 2362.
Machine mounted Tachometer now with Surface Feet per Minute (SFM)
About 6 months ago I introduced a Machine Mounted tachometer. The advantage of this tachometer over a hand held one is that it is safer to use, and always there. No need to check the pulley settings on the machine. It had another feature in that there can be two reflective sensors so a machine with dual motors can have their RPM checked with one tach simply by pressing a button. It has a sleep mode that when not being used reduces the current required. The one that I installed last April on my Shoptask has batteries that are now 6 months old and should last another 6 months.
Since then we have add a SFM feature that will tell you the nearest SFM as well as the speed. You simply press one button to select the SFM reading you want. It works with both milling cutters and lathe stock diameters. It can be set for 1/8”, 1/4, 3/8, 1/2, 3/4, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. As far as I know there is no other tachometer that will readout both the RPM and nearest SFM. Best of all the prices for the tachometer will be the same.
Here are the options.
1. Tachassembled. Assembled and tested with a two reflective sensors.
Installation instructions $69+s/h
2.Tachassembled. Assembled and tested with a single reflective sensor.
Installation instructions $65+ s/h
3. Tachkitcomplete2sensors all of the above in 2 plus a second sensor for
use with dual motor machines $55 +s/h
4.Tachkitcomplete $49+s/h includes all of the above plus the machined
case
and all the parts.
5.Tachkitbare pcb, lcd, programmed PIC chip, single sensor, instructions, no
resistors, switch, case or capacitors $39 plus s/h