Hi Carl,

We fitted a DRO to an M250 at college from Goodwin Technology Ltd. It was fitted by the workshop technician with no issues and had a very comprehensive fitting kit. Two years on and with student use, its still working fine. I have no connection with the company just a satisfied customer.

Jim.

.

Most have far more functions on them by default than 'most' people will ever need.

The Eaason ones sold by M DRO (advert on RHS of this site) are IMHO very good value middle of the road DRO systems that are a blend of reasonable quality and price.

As the M250 is quite a small machine (about the same size as mine) I opted for magnetic scales due to them having quite a bit smaller profile and so not loosing much of the machines capacity.

Nick

I have a couple of Newall systems. The lathe came with one fitted and I fitted the other to the milling machine. I followed the instructions and made guards against swarf. It took time but was not difficult.

I am very happy with them. If I was to fit DROs now I would still use Newall but I have to admit I know nothing about other manufacturers' products.

JA

I don't think there are any poor scales the last few years even budget ones from Easson, Goodwin to Sino. The Indian made ones are ok too available from a place over Leicester way.
Most installers just throw on for ease rather than look at whats wanted and work around it. Some shows been to seen horrendous hashes on display as a demo, notably the Y axis and display position.
Admittedly I did have to mill the carriage to set down the magnetic Y axis so the 55 degree angle above to could be used and only losing think 6mm where tailstock butts up to.

Have the Sino made C type from Allendale 3 axis on mill and X axis on M300, no need to shim on quality lathes off the hydraulic taper lugs, theres more flex in the extrusion. Just need the rare clean on some axis, my case vertical on mill every 8 months.
Not applicable Allendale have stopped doing the budget readouts I have on both mill and lathe 3 axis. One holds zero when switched off the other don't. Lathe cant 1/2 Y axis without halving X and tail stock. Next cheapest now £50 dearer.
I cant recommend the magnetic in 5 micron, its just not repeatable enough for fine threading and tolerances, can easily be 0.18mm out. If do opt for magnetic pay the extra for 1 micron.

Ian its noticeable when sending down a tool ie threading to friction fit tolerance, not altering anything it will either take a spring cut or need up to 0.08mm feed in to take a slither off. Next time send down loads come off.
Not a problem if just doing a thread, idea above is friction fit thread tolerance ie nil, by time its anodised its sloppy and not the sort of thing want on 0.75mm pitch holding 300bar back.

Its a physical movement of the Y axis magnetic 5 micron scale. Some years back did a test of cheap vernier type, C type Sino glass and the magnetic all in situ with remarkable results which lead to errors. Worst was using the supplied bracket with the vernier type think was up to 0.3mm out by time it started to move.

I can only treat the magnetic as some where near to within 0.15mm on diameter. If take off 0.075 it may well be still oversize +0.06 to well under by 0.1+ well out of synch to the stated measuring accuracy.
Glass Sino are ok to 0.05 repeatability about 3 times better.

.

Well there you go then. Think you answered your own issue.

Nick

Hi

I just read the post re Warco linear scales on the forum today

I thought that maybe the unit was similar to one I had seen on a lot of the turret mills sold by machinery house in Australia, Made by a company called Carmar in Taiwan. the colours are different but the styling was similar. The scales they sell are maybe a bit more industrial?

**LINK**

I guess it is about time i fitted my mill with a DRO and had been considering these units, Is anyone in the forum familiar with them?

Regards
John