Tramming With Taut Wires

[John McNamara]

Hi Kitwn

I like the way you use the spindle to rotate the sensor contact using the spindle itself. and the way you use reversing it on the same wire to establish that the spindle is at 90 degrees from that wire.

I am a little confused about relying on the method to align both Y (Along the table) axis bearing alignment wires,

In order to do this the carriage must be geometrically perfect, any twist making the carriage rails deviate from co-planar would mean that the long axis rail alignment wires would be adjusted to the error introduced in the carriage.

Taking a measurement from another measurement system is always difficult.

Ideally the long axis wire need to be aligned first with the lased method then using your method the carriage twist could be minimized using the y axis wires.

I hope I have understood your photos correctly.

Regards
John


Useful links:

Do a google search for wire alignment
https://www.google.com/search?q=Wire...hrome&ie=UTF-8

A useful and hard to find sag table
https://web.archive.org/web/20100602...wire-sag_1.htm

Sag calculator (Tick metric if you use metric it does both imperial and metric)
https://www.spaceagecontrol.com/calccabm.htm