rpm tachometer app?

[squazy84]

For the more computer literate among us...is there an app for my phone that could accuratly read rpm on a milling machine?

 

[dannyp]

dought it, if the camera was good enough i can work out how to go about makeing one in theory tho

 

[julianthegypsy]

dought it, if the camera was good enough i can work out how to go about makeing one in theory tho

Worthwhile exercise. Does anyone remember the old flymo rev counters? They were brilliantly low tech for single cylinder engines (apologies for going off topic!)

 

[Spark plug]

Just had a look there is one on the App Store but I don't imagine it's very acurate. It uses your phones light as a Strobe and you vary the strobe rate until the object appears stationary

 

[dobbslc]

Then you stick you hands in it and chop!

 

[Luke]

I bought one of these and it's been fine.

http://pages.ebay.com/link/?nav=item.view&id=252147885959&alt=web

 

[slim_boy_fat]

I've not long had one of that exact one - not have a chance to test it yet. Bought it to check rpm on an electric motor for the linisher I'm [eventually] build [it's well down the project list , although I had just made a start but it got shelved.....].

 

[ford34/2]

http://www.ebay.co.uk/itm/311016646077?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

Got one of these on the lathe, needs a DC supply and a box to put it in. Oh and a magnet(supplied) attached to whatever is revolving,-- the bit you want to check speed of.

Stan

 

[julianthegypsy]

A strobe is often the best thing though, I had trouble with reflective sticky tape flying off on industrial centrifuges, and magnets would do the same thing, except they wouldn't stick to stainless in the first place. We did use proxy sensors on the drive shafts though and they were quite effective, if a bit fiddly to set up in some applications where the shafts got hot and changed the distance enough to throw it out of kilter...

 

[squazy84]

cheers lads, i ordered the china tachometer posted above,ill update with the results of my 8 quid gamble ha ha!

 

[the snooper]

that 8 quid tachometer would be great for adding to a turntable, it would keep your old vinly records at the right speed with the ability to adjust the speed

 

[ukracer]

that 8 quid tachometer would be great for adding to a turntable, it would keep your old vinly records at the right speed with the ability to adjust the speed

But not for a lathe or linisher then???

 

[the snooper]

But not for a lathe or linisher then???

perfect but we already knew that, it was the fact it measures very slow speed that made me think about it

 

[ukracer]

perfect but we already knew that, it was the fact it measures very slow speed that made me think about it

AH sorry I misunderstood.

 

[BrokenBiker]

Just had a look there is one on the App Store but I don't imagine it's very acurate. It uses your phones light as a Strobe and you vary the strobe rate until the object appears stationary

whats it called and is it free? interested in trialing it as i know the speed of my grinder so could compare its reading to that

 

[Spark plug]

whats it called and is it free? interested in trialing it as i know the speed of my grinder so could compare its reading to that

It's called "strobe light - tachometer" and yes it's free.

 

[mechman]

For the more computer literate among us...is there an app for my phone that could accuratly read rpm on a milling machine?

I'll have to get a milling machine now.

 

[BrokenBiker]

The one I downloaded doesn't work...just tried it on my 18v drill, started at max and worked my way down and not once did it give the illusion of the drill being stopped

 

[zx9]

The one I downloaded doesn't work...just tried it on my 18v drill, started at max and worked my way down and not once did it give the illusion of the drill being stopped

Did you try it in low daylight ?

 

[BrokenBiker]

I tried it in normal light, low light and darkness.