Member postings for Russell Eberhardt

The wires labelled Z1 and Z2 go to the start winding. To change the rotation direction you just need to swap these over. Usually this is done by moving the links for example like this: http://www.net-eng.co.uk/pdfs/Motors/single-phase-revers.pdf. However it looks to me as if your motor has had an external capacitor added to replace a faulty internal one and the wiring has been changed somewhat. If you can just swap the Z1 and Z2 connections it should work.

Russell.

I agree, ever tried rewiring a ceiling rose?

Russell.

Best to follow the drawings. I don't know the Tich design but the radius where the radius joins the barrel is not usually flanged. Some designs call for a curved L-section to be fitted on the outside but this shouldn't really be necessary.

Russell.

You just have to reverse the connections to the field windings. If you can find a two pole changeover switch it can be wired to act as a reversing switch.

Russell.

Old turned wooden objects often have a cross shaped recess in one end. Could this be a driver for wood turning?

Russell.

It depends how bad it is to start with. Certainly I would avoid the wire brush and polish. If it's really bad then getting it reground is the only way. Surface rust can be removed with fine wire wool and if you are really keen you could hand scrape it like this: http://www.youtube.com/watch?v=uHF7TtHVSWE but you will need a good surface plate. You don't want a polished surface, the slight irregularities in a ground or scraped surface will hold the oil.

Russell.

Yes, it's working for me again now. Thank you whoever fixed it.

Russell.

I've just updated to Firefox 10.0.1 in my Ubuntu installation running on Virtualbox and the digital issues work fine for me. Have you done a full update of Ubuntu recently?

Russell.

Chris,

It depends on the brass you are using. If it is leaded free cutting brass you should be OK but if it is common brass I would try a lower speed, say 400 rpm.

Did you harden your silver steel tools? Silver steel is supplied soft and needs to be hardened and tempered. You have to be careful not to overheat them when grinding.

I wouldn't try to cut steel until you have mastered cutting brass.

Good luck.

Russell.

Perhaps a more serious problem is that, for me at least, clicking on the "quote" button at the end of a post no longer works. It takes me to the editor but the quote doesn't appear.

Russell.

John,

I too run Linux and have QCAD. It supports .dxf files but not .dwg. Don't know about LibreCAD, I've not tried it.

TotalCAD looks good. It's a shame it is only available for Windoze. Have you tried it in Wine or on Windoze running on Virtualbox?

An important point for me is being able to accurately print 1:1. . It makes life much easier when cutting awkward shapes to be amble to print the draying and stick it to the work with artists spray mount and cut along the lines.

Russell.