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.

DIY Drill Press

This is an old project which I built since last year. I just want to share and add as a project log here.

As a developer from undeveloped country, my budget is very limited. So, I chose DIY style drill press.  So, I have to collect parts for my projects from old printers, scanner, etc.

This is a pilot project , built for my need to build upcoming a CNC project.  Another problem, I don’t have any power tools except a small drill gun and hand tools. After learning DIY CNC process from internet, before building a CNC, I think I should have a drill press for perpendicular drilling. So,I decided to build a drill press first.

1# collected required material for base and a cheap china made rotary tool. A bamboo kitchen plate is my favorite for base plate in such design, weight is heavy, thick and rough. A L shape supports for vertical stands. Total material cost is about 25$ 🙂 .

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# Started with vertical support, vertical Z axis linear slide rod from old printer.

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Fixed rods with L shaped aluminium bars with wood stoppers.

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Assembled Z axis and rails.

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3# prepared for linear slides and Z-axis slides. Two plastics bars are used as linear slides.

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4# Prepared for rotary tool mount by cutting two plastics plates.

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Fixed the holder plates on vertical Z bed.

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5# Fixed rotary tool on bed by using steel hole bars and spring. I wanted to make flexible and changeable tool bed.

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Z axis and tool is tested and installed.

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6# After this, a handle was designed.

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Designed and cut push down lever crowbar bars.

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Installed both side of gantry plate.

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Prepared for handle.

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7# Finally, a DIY drill-press is on my bench. Attached a iron flat rod to strengthen vertical stand.

Nothing special, just a simple, cheap and working DIY tool 😀 .

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By oakkar7

okelectronic.wordpress.com