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View Full Version : Actual dimensions of the igaging DRO not on their site??? specs very limited.



J Tiers
03-05-2015, 10:43 PM
The igaging folks don't give much in the way of specs or data....

I wanted to plan out how to mount a pair of them. And I wanted to decide between the "Absolute" and the lesser ones "for woodworking or mill".

1) I want to put a set on the Lewis mill. I can see something of a problem with mounting, since there isn't a lot of choice as to where to put the scale. So I wanted somewhat exact dimensions to see if there is any decent way to fit them. It may just not be possible, in which case I don't want to buy the stuff.

But, all they actually give is a rough overall distance of travel. No details on how big the scale and the head are. Not very helpful to plan out how to mount them.


2) Also, there does not look to really be much difference between the "Absolute" and the others. It may just be the readout. The "accuracy' figure isn't always shown the same. The difference looks to be that one is 0.001 error over 6", the other 0.002" error. But the specs are so "casual", that it is difficult to determine what the real deal is.

They are cheap enough, but cheap is no substitute for working at least decently, "china inc" notwithstanding. OTOH, I don't really want to pop for a full DRO setup, which would cost as much as the mill itself. It's pretty much between the two.

The whole "woodworking" thing with 64ths as a readout option is a little sketchy sounding.... But then the "Absolute" look to not be much better in reality. The two may actually be using the exact same scale and reader head, which seems to make any difference pretty questionable.

So....

Are the dimensions available anywhere? I'll ask the igaging folks, but I'm not expecting much back, given how loose their data is to begin with.

Anyone have any better data on how accurate they really are?

The space available in front just for the lengthwise travel scale is a little tight, especially with the table clamp being right there. Can't go behind, due to the table moving right back to column.

http://img.photobucket.com/albums/0803/jstanley/machines/Lewis/lewis%20DRO%20space%201_zpssgvmp0tb.jpg (http://smg.photobucket.com/user/jstanley/media/machines/Lewis/lewis%20DRO%20space%201_zpssgvmp0tb.jpg.html)

Vertical space for it is also tight....

http://img.photobucket.com/albums/0803/jstanley/machines/Lewis/lewis%20DRO%20space%202_zpsu3sw9nzc.jpg (http://smg.photobucket.com/user/jstanley/media/machines/Lewis/lewis%20DRO%20space%202_zpsu3sw9nzc.jpg.html)

thaiguzzi
03-05-2015, 10:50 PM
Check out Yuri's website. It's all on there. The more expensive ones (double in price?) have a much more durable reading head with metal parts rather than plastic, scales are s/s rather than aluminium etc. They are very different in overall quality, and if you can afford it, i would'nt even think of putting the cheaper basic ones in a metal working enviroment. Go for the "Absolute" version for a mill.
My 2 baht's worth...

J Tiers
03-05-2015, 11:02 PM
Who is Yuri?

Mr Fixit
03-05-2015, 11:39 PM
J Tiers,
Here is a link to Yuri's web site. He is a fella that has designed an open sourse DRO that uses I Gaging scales and arduino circuit boards. This DRO is very inexpensive to build and for the HSM it is a good alternative. I have been following his posts for quite some time. I have saved enough to pull the trigger on buying the parts to build one for my BP Clone next month.


http://www.yuriystoys.com

Mr fixit for the family
Chris😃

J Tiers
03-06-2015, 12:12 AM
Well, no more data about size there than anywhere else, PLUS some complete confusion!

<<<<What is this "Accuremote" thing? is it different from igaging? Yuri seems to indicate it is another igaging version, but I see nothing about it on the igaging site. >>>>>

Never mind that.... Accuremote seems to be another version of the digimag from apparently the same folks, sold differently...Some of the same dealers sell igiaging and Accuremote. Different pad stamping on the front, otherwise nearly the same-looking stuff. Stainless scale, more portions of the read head are metal, although the cover is still plastic. They claim better resolution from what looks like the very same readouts etc.

They don't seem to have an upscale version like the "Absolute".

igaging have "absolute" and regular which must be the "digimag". The Absolute looks to be the same reader head (plastic) as the digimag.

Somewhere I did find the info that the 6" scale is actually 10.5" long, which is almost prohibitive in size. So each scale must be at least 4.5 inches longer than the movement number.

Stu
03-06-2015, 08:07 AM
The reading head on mine is 2 15/16" x 1 1/2" by 11/16", the scale is a 1/8" x 3/4". there are multiple threaded holes on the back of the reader for mounting the stock and custom mounting plates. The scales are easily cut.

Stu


http://i913.photobucket.com/albums/ac334/bstupak/igaging_zpsvcpvxsi7.jpg (http://s913.photobucket.com/user/bstupak/media/igaging_zpsvcpvxsi7.jpg.html)

J Tiers
03-06-2015, 08:52 AM
Thank you, Stu!

Now for some 3D work.

Mike279
03-06-2015, 09:07 AM
I have both and the Absolute seem to be a bit better. The cheaper set tends to jump the readings sometimes. The batteries may last great in one unit(I Image) and twenty minutes in another. The Absolute's have a stainless scale whereas the I Image has Aluminum. The scales are not interchangeable as I have tried and they even have issues if you turn them over. The cords although appearing to be non replaceable are, when you open the reader. I have not used the Absolute set much yet, so I can't say how they are going to hold up. Mike

caveBob
03-06-2015, 09:36 AM
You could skip the digimag versions altogether and go with Renishaw LM10 linear magnetic encoders/0.0001 accuracy. In the end, they don't cost that much more, but are smaller and maybe easier to cobble mounting for. Would need magnetic tape for them as well, a couple sources:

High Accuracy Magnetic Linear Tape
http://www.sra-measurement.com/high-accuracy-magnetic-linear-tape.html

MS200 Magnetic Scale or Tape for Renishaw LM10 Encoder or WMEH2530 Encoder,2mm
http://www.ebay.com/itm/MS200-Magnetic-Scale-or-Tape-for-Renishaw-LM10-Encoder-or-WMEH2530-Encoder-2mm-/331023801182

Magnetic Tape Support Profile
http://www.sra-measurement.com/digital-readout-systems-dro-display-console-magnetic-encoder-lcd.html?encoder_parts=1022

On this page (http://www.dawsoncontrols.com/millupgrade.html), scroll down about 1/2 way to "LM10 linear magnetic encoder system strip readers" for more info where a guy from another forum uses them.

thaiguzzi
03-06-2015, 11:18 PM
They are all made by the same factory/company in China called Shahe or something similar. Ali Baba will reveal all. Absolute and Accuremote are the same thing, different branding.
Regards, Mike.

davidh
03-07-2015, 10:53 AM
accuremote has been discontinued and replaced with the absolute. . . and they are not the same according to the importer. . .

tlfamm
03-07-2015, 11:49 AM
Check out Yuri's website. It's all on there. The more expensive ones (double in price?) have a much more durable reading head with metal parts rather than plastic, scales are s/s rather than aluminium etc. They are very different in overall quality, and if you can afford it, i would'nt even think of putting the cheaper basic ones in a metal working enviroment. Go for the "Absolute" version for a mill.
My 2 baht's worth...

Ah - a two-baht opinion, eh?

sawahdee krap

thaiguzzi
03-07-2015, 11:35 PM
Dee mak. sawat dee.
Or as they say up here near the Laos border, sabadee.
Apologies for straying off topic, but i appreciate someone who can remember a bit of the Thai lingo.
Mike.

J Tiers
03-08-2015, 06:04 PM
DRO bu hao

Looks like the DRO offerings are probably just plain too fat to fit on the mill, unless I put some crazy construction off the the side. And if I did that, the flex and imprecision of that would probably negate the accuracy of even the old Digimag type woodworker's DRO.

Given the crappy specs from the igaging (or from Anytime tools, or from anyone else selling them), I am happy to have saved the waste of money on something which I have no good plan for attaching.

The biggest problem is the outsized reader head, but there just is not a lot of room on the front of the table anyway. Anything put there had better be bulletproof, and those plastic things are anything but that. Even the stainless one is still half plastic.

Thanks again, Stu

Stu
03-08-2015, 06:25 PM
The biggest problem is the outsized reader head, but there just is not a lot of room on the front of the table anyway. Anything put there had better be bulletproof, and those plastic things are anything but that. Even the stainless one is still half plastic.

Thanks again, Stu


Any room on the back of the table, that's where I have mine mounted

Stu

davidh
03-08-2015, 08:30 PM
go to my Facebook page, look at how i mounted mine and made a simple cover for it.
"birch industrial tool service inc". you do not need be a member nor download anything to look at it.
how big is your machine ? or better yet, what is the travel length. . .

J Tiers
03-08-2015, 10:31 PM
Any room on the back of the table, that's where I have mine mounted

Stu

Plenty of room at the back... until the table is run in, when the rubber guard gets in the way, and the back of the knee slide almost hits the column....

Guarding the front is no problem, but retaining the ability to use the table lock, or adjust the gib... that would be an issue.