Warco Super - Major Vario inaccuracy

I bought the mill for making parts for my motorcycles

and yes I have to except it’s not industrial quality but warco claim .0015” on there accuracy reports so I guess someone has not checked correctly

and I would like it to bore holes vertical

and the errors I have the deeper you bore or drill the worse the errors will get

Michael,  without rotating the spindle you cannot get a true measure of the axis it rotates on to tell if it is square to anything. The results could have been obtained by mounting the DTI on any stationary part of the machine.

Agreed it's not an easy fix.

Edited By JasonB on 15/02/2019 20:28:44

MichaelG.

has got what I am on about

Robert, are you holding your dial gauge in a collet or the supplied chuck?

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Would send pics but they don’t want to up load

How to add photos here

Does this work with an I pad

Try a PC.

Tony

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Yes [unless it's one of the very early ones]

But do be aware that you can't upload .png or .pdf files 

... strictly .jpg or .jpeg 

MichaelG.

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Edit: The photos are in your album, now just select the little black 'camera' icon and follow your nose.

Edited By Michael Gilligan on 15/02/2019 21:13:21

I have the same mill purchased beginning of last year. How are you measuring front to back, I ask as my DRO scale and power feed switch box limit travel to just under 8" If I rotate the head willy nilly and tighten it up any old how I can get bad readings. However if I clock the spindle as I am tightening the head and balance the loads on the fasteners I can achieve ± 0.0015" front to back, till I lean on the head or do some work on it, then those figures are irrelevant. I assembled and set the mill up here on my own, I needed to loosen the column bolts and shim under the rear of the column to get the mill spot on (strip of beer can did the job). I'm not machining exotic alloys so left it at that, otherwise I would add levelling epoxy to gap fill. My column moves the same as it did when the surfaces were mated, so for me it's not an issue. I might also add that all my measurements are taken off the base of large precision Vee blocks, so the key slots don't interrupt measurement.

Overall I am very happy with the mill, I can achieve the precision I need in alloy and plastics. I have done some steel and cast iron work using a 50mm face mill (conservatively) holding a tolerance within ±0.001" in 6" I have had some issues with the mill, but resolved them myself.

this is my accuracy report 

Edited By Robert Askew 1 on 15/02/2019 21:24:08

Item No. 3 is "interesting"

MichaelG.

Here is my clock readings

Edited By Robert Askew 1 on 15/02/2019 21:45:57

Robert, if you are holding that DTI in a chuck and not a collet that is probably where a lot of your error lies.

Unfortunately we can't see wht you are doing.

Regards

it’s held in an er32 collet

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As the dti is not being revolved it makes no difference how it is held or on what part of the machine it is fixed to.

Your first photo shows the DTI on something laid across the table but the last seems to show it directly on the table but there is 0.008" difference between first and last reading.

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I think you will find that the slip is still there, Jason

... its edge is the diagonal line just to our right of the DTI probe

... and there is a reflection in the surface.

MichaelG.