Thr Gibraltar toolpost was a massive toolpost invented by G H Thomas for use on his Myfoird 7. It was big and so rigid and held just one tool.
To turn short tapers (Such as when trimming up a centre ) the Topslide is offset. For most rurning /facing work it is set parallel to the axis . But Taper centres for the tailstock are usually hard, whilst those for use in the Headstock are soft, and need a trim up, occasionally.)
The tool needs to be set with the cutting edge on the centreline of the lathe. If it is not, it will not cut propoerly; if at all.
It seems a feature of Raglan lathes for the 4 way toolpost not be moiunted on the Top Slide, which can be a bit of a PITA.
(I made a rather skinny 4 way toolpost to fit on the Top Slide, for a friend who had a 5″ Raglan.)
Your lathe needs a realy good clean after being used for wood turning. Then reassemble it and carefully align it. The time spent eliminating twist from the bed and setting the tailstock in line with the headstock will be well spent. (A twisted bed will not produce parallem work.
Buy a cipy of L H Sparey “The Amateur’s Lathe” or Ian Bradley’s “Myford Series 7 Mnual”. These will tell how to check and adjust to remove twist from the bed. They will tell where to put shims to correct any twist. It is usually worth making adjust ments at the tailstock end. But on the Raglan, there is only one fixing unsr the tailstock., so that should make life easier.
Once the bed is free from twist, then you cam start work aligning Tailstock and Headstock centres (Trim up the Headstock centre, first. Making sure that both the internal and external tapers are undamaged, and clean)
Ideally for this you coiuld do with a 4 jaw independent chuck, a DTI and a magnetic base, to make an alignment bar for this job.
Once the lathe is set up, then you can start to become familiar with it, just cutting bits of metal to gain experience.
Remember that if you put on a 0.010″ cut, the diameter will decrease by 0.020″(You will take off metal when the far side comes around to the cutting tool.)
How do you set the tool at centre height?
Initially by ” suck it and see” facing cuts. If the tool is off centre, it will l;eave a “pop” on the end of the bar. Keep adjusting the tool height (Make sure that the tool is sharp!) until you cannot feel any pip. The tool is then on centre height.
This might then be the time to gain experience and confodence, by making your forst tool; a Centre Height gauge.
Having set that to the tool in the toolpost, it can then be used to set any other tool that you put into the toolpost, or the 4 way. You will also have gained a bit of experience in turning and facing, and possibly drilling and tapping.
When drilling, start with a centre drill -DON’T force it. It is nigh on impossible to renove the broken stub pf a centre drill from a workpoece.
If you want advice, and pictures, of Centre Height Gauges, P M me, preferably with an E mail address, so that i can send you picturea
Howard