DIY csCNC – 7 (Spindle, Autolevel and Milling Test)

Spindle needs a lot of power and speed. But I have very limited resourced. First, I considered DIY style spindle but I cannot source right bearings and chuck or tool holder. So, I tried to use some small rotatory tools, PCB drill.

Some problems solved are:

  • CNC stopped with limit switch errors in a few minutes and after started milling. I checked limit switches and used a lot of methods such as filters, shield and cables but it didn’t work. I measured spindle motor’s power line (it is 12V DC ) and noticed some spikes. So, I replaced stocked 12V DC power supply with a good old quality power supply and the errors gone.
  • I know why everybody is talking about bed leveling. My first test did’t went well. I checked later that leveling error is about 2 mm from edge to edge of the bed 😦 .  Some said http://chilipeppr.com/tinyg but I preferred stand alone program and this worked fine.

https://github.com/martin2250/GrblHeightProbe2

  • The only problem is I used WinXP and the program required .net ver 4.5 and this version didn’t support WinXP. So, I forked and recompiled with .net version 3.5 and Visual Studio Express 2012 to support WinXP.

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Unfortunately, they cannot do the jobs well. Seem RPM is low and tool holders is vibrated a bit.  So, I tried small rotatory tool and it does the job for the first time.

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I did some tests for 1 mil , 2 mils and 4 mils PCB tracks. The result is not so bad for the first run.

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I don’t have proper CNC bits and waiting for the ordered bits for now. I will write a post about some final touch and tips and also about PC software soon.

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