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Stew makes a Bogstandard Tram

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sbwhart:
OK John tip noted I've only taken the first cut so plenty more to come off

Thanks

Stew

sbwhart:
John

A big thanks for warning me about the centre, when I took the running centre off the spring in the shaft was immediately apparent, I can remember on your thread showing not using a centre but the significance of this just past me by, if I'd carried on a significant error would have resulted, I hope that others will learn from my near mistake.

Ok so as I'm going to be using the tram with a clarkson type collet holder the centre is important so I cut off the centre using the No 1 parting off tool (haxsaw) refaced and recentred  the shaft.



Finishing the shaft to size 3/8"



A 3/8 BSF thread was die cut onto the shaft to screw into the clarkson 3/8 collet:- sorry no pics

The marking up die and a final debur and the tram was ready to be set up. To do this you simply place the tramp on a flat surface in this case the milling table and simply zero the bezels.



Now I know that my mill is giving a whisper of a back cut when the work is fed in from the left that means the head of the mill is leaning to the left, would the tram show this:-

Yes it did it showed a 0.02 tilt to the left



To adjust this out was simply done by slackening the clamp bolt and adjusting the so that both dials read the same, the Tram showed up its sensitivity as tightening the bolts would move the dials but once I'd appreciated this it was just a simple mater of anticipating this movement.

Both dials reading the same Mill set



Well I think I've made a precision bit of kit thanks to Johns advice and interception worthy of a wooden box with dove tail joints brass hinges and corners, but until then a plastic food box will have to do.



Her it is safely stored away on a shelve for future use.



Its enough to make old Mr Chippendale turn in his grave but it'll make Mr Tupperware happy

Now where are those weeds

Stew

Darren:
Stew, Bogs, anyone..... :ddb:


To check how accurate the tramming tool is, can you zero the two dials when facing you, turn 180 deg and check from the back. Use a mirror if need be.

 :ddb:

sbwhart:
Darren forgot to show this

Checking the tram in the other direction



It was spot on with my machine

Stew

Darren:
Excellent..!!!

I not seen anyone mention this, so just thought I'd speak up.... :ddb:

I want to make one now  :)

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