Digital readout dial test indicators

Advert

New Replies

Report Bug

Help/FAQs

Digital readout dial test indicators

This topic has 18 replies, 10 voices, and was last updated 28 September 2013 at 12:39 by jason udall.

Viewing 19 posts - 1 through 19 (of 19 total)

Author

Posts
26 September 2013 at 10:59 #130745
S Deakin
Participant
@sdeakin73134
Hi

Does anyone know if the readout rotates on digital style DTI

Thanks
Advert

26 September 2013 at 10:59 #22860
S Deakin
Participant
@sdeakin73134
26 September 2013 at 14:47 #130763
Mike Poole
Participant
@mikepoole82104
I have two mitutoyo ones and both displays rotate. I would imagine it is a common feature as reading upside down would be prone to error.

mike
26 September 2013 at 18:23 #130776
Gone Away
Participant
@goneaway
I've always shied away from digital dial gauges because it seemed to me that the jitter you get when running over a part (which is easy to average by eye on an analogue gauge) would make the digital gauge hard to read.

(I've never actaully seen a digital DTI but I presume the same would be true of them).
26 September 2013 at 18:36 #130777
JasonB
Moderator
@jasonb
Some have a "swingometer" which is much like watching the needle swing back and forth. Hold your mouse over the dial on this one and you can see the graduations around the top of teh dial
26 September 2013 at 18:37 #130778
Mike Poole
Participant
@mikepoole82104
I also have analogue DTIs and I would agree that they are easier to use for some tasks than digital gauges. I still have an AVO in my drawer but the Fluke has become the tool of choice due to its portability and robustness. The AVO was most unlikely to survive being dropped but the fluke in its rubber case survives most incidents on the shop floor.

Mike
26 September 2013 at 20:11 #130780
Ian P
Participant
@ianp
Posted by Michael Poole on 26/09/2013 14:47:10:

I have two mitutoyo ones and both displays rotate. I would imagine it is a common feature as reading upside down would be prone to error.

mike

I have a no-name digital DTI with a fixed display but after trying it once I have never used it, in fact I now wonder why I thought I wanted one!

For home workshop use I cannot see any reason why digital would be better than analogue, except possibly if it was on a mount being used as a comparator.

As regards rotating displays, my searching found that it is somewhat unusual rather than being a common feature.

Ian P
26 September 2013 at 20:45 #130781
Russell Eberhardt
Participant
@russelleberhardt48058
Posted by Michael Poole on 26/09/2013 18:37:53:

I still have an AVO in my drawer but the Fluke has become the tool of choice due to its portability and robustness.

The AVO is better for tuning for maximum voltage etc. The analogue display on digital meters doesn't have the resolution. I guess the same applies with dial gauges.

Russell.
26 September 2013 at 22:14 #130785
Gone Away
Participant
@goneaway
Posted by JasonB on 26/09/2013 18:36:47:

Some have a "swingometer" which is much like watching the needle swing back and forth. Hold your mouse over the dial on this one and you can see the graduations around the top of teh dial

Interesting – haven't seen that before. They seem to be admitting what I said by adding what is effectively an analogue scale to the digital, Still, unless you are reading a TIR or some such where the absolute reading isn't needed (in which case you probably don't need the digital part of the display) or unless they have also damped the digital display, that part will still be dancing. Think I'll stick to analogue dial gauges.
27 September 2013 at 11:02 #130808
S Deakin
Participant
@sdeakin73134
Thanks for the feedback chaps. It looks like one has to be careful in selecting the DTI that will do what you require. I would definatly not want a digital that did not rotate, but do you know, there is no mention of this feature on the Mitutoyo or Moore and Wright web pages.
27 September 2013 at 18:06 #130841
jason udall
Participant
@jasonudall57142
Must say I find remote reading handy..and by moving dial/display to other end of wire , this makes probes much more compact.

Edited By jason udall on 27/09/2013 18:08:58
27 September 2013 at 19:12 #130843
Sub Mandrel
Participant
@submandrel
I have an analogue guitar tuner (Vox)that is about 25 years old. I have always found it hard to use, and resort to manual tuning in preference unless I need to be on concert pitch (i.e. not for the last 17 years).

I picked up a digital Fender tuner for a tenner which has a light-up 'swinging bar' display. It is wonderful and easy to read and now I use it all the time as it is quicker than going by ear and as it uses a contact mike it works in noisy places.

Neil
27 September 2013 at 19:31 #130847
Michael Gilligan
Participant
@michaelgilligan61133
Posted by jason udall on 27/09/2013 18:06:08:
Must say I find remote reading handy..and by moving dial/display to other end of wire , this makes probes much more compact.

Edited By jason udall on 27/09/2013 18:08:58

.

Jason,

Here is "an oldie but a goodie" for your appreciation.

None of that nasty digital stuff … just incredibly good engineering.

MichaelG.
27 September 2013 at 20:08 #130851
Sub Mandrel
Participant
@submandrel
Michael,

When a screw is labelled as "mechanical device for zero setting", you know you are paying for quality

Neil
27 September 2013 at 22:06 #130859
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Stub Mandrel on 27/09/2013 20:08:23:

Michael,

When a screw is labelled as "mechanical device for zero setting", you know you are paying for quality

Neil

.

… and when you consider that the axial probes are typically 8mm diameter, you know you are getting what you pay for.

MichaelG
27 September 2013 at 23:48 #130863
jason udall
Participant
@jasonudall57142
that device looks like a LVDT.. linear voltage displacement transducer..

use mercer 493 probes all the time.. with air gauges.

but the 493 is just a linear probe.

when used with the micro columb (simulates the manometer style display).. you get a 300 mm high bar graph and 7 digit digital display..

493 gave in linear mode 1/10th micron resolution.

thoughly recomend them

Edited By jason udall on 27/09/2013 23:49:56
28 September 2013 at 00:21 #130867
Anonymous
Errr, when I was designing the drive and sensing electronics for LVDT devices I thought it stood for:

linear variable differential transformer

Andrew
28 September 2013 at 07:23 #130869
Michael Gilligan
Participant
@michaelgilligan61133
Posted by jason udall on 27/09/2013 23:48:23:

use mercer 493 probes all the time.. with air gauges.

<etc>

.

Some info about the Mercer units here

MichaelG.
28 September 2013 at 12:39 #130898
jason udall
Participant
@jasonudall57142
andrew.. your expansion of the acronim makes more sense and is more use

.I have no claim to the definitive answer..(if one exists)…

But thanks for the devices . I always liked seeing my babies in use .. I am sure you get the same.

Edited By jason udall on 28/09/2013 12:42:17
Author

Posts