10/29/2023 0 Comments Homemade laser plumb bobA lot easier than pointing a laser from one end. By anchoring each end of the wire to the machine frame precisely you can place the linear rail exactly where you want it. Using wire or fishing line allows the measured line to be accurately positioned. Gee using a microscope with your software is a huge step, 3 um = 0.00011811 about a ten thousandth of an inch imperial. ![]() If there is enough interest I will share the app, needs a bit of a cleanup first as it was a quick hack. The wire is then suspended a few mm outside the epoxy bed. The depth of field (variation in objective distance where object remains in focus) of the microscope is probably <1mm so you need to get the wire guides to the same height so the wire is not sloped, I set mine level with the top of the epoxy bed using a ruler. M6 bolts make perfect wire guides for 0.28mm wire, the wire locks into the V of the thread. The microscope cable must be tied to the carriage to avoid any force being applied to the back of the scope pushing it off axis.ģ. The focus winder is solid enough not to move on its own.Ģ. Turning the focus winder shifts the optical axis which would throw off any measurement. The microscope (£20) must be focused once at the beginning and then not touched. The length I put on the machine yesterday hasn't stretched at all over night.ġ. It only flows for around 30s after tension is applied and under the microscope you can see when it stops. These axis are only 1300mm long so normal lightweight fishing line seems to be perfect, very uniform and black meaning it is easy to resolve in the software. Yes they do sell steel leader, music wire is also an option. I just need to work out a carriage arrangement for the round supported rails. One measurement I was completely unable to make on my machine was the straightness of the fixed rails. ![]() Do fishing shops sell stainless steel leader in the UK? It's what I used and may be more stable than nylon. Having just found out how effective taut wires can be for machine alignment I can really appreciate the value of the new software.
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