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Software and Information for Machinists |
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CNC Mill Conversion To Do List
Components Purchased
| 1KVA 67Vac x 2 (dual coils) and 12Vac x 2 (dual coils) toroidal power transformer. Should I use 2 of the capacitor/rectifier assemblies that I used for the CNC Lathe since it has 2 coils? |
| 19" x 19" x 12" Rittal NEMA Enclosure for the electronics |
| Industrial Hobbies "Mechanicals Only" CNC Conversion Kit |
| 3 x Industrial Hobbies Optical Limits |
| 3 x Gecko 320 servo drivers from www.homeshopcnc.com ($99 when ordered with the servos) |
| 3 x 850 oz in Servos with integral enclosed encoders from www.homeshopcnc.com |
Conversion Checklist & To Do
Note: Order is based on the IH CNC assembly instructions ordering. Completed items are in bold.
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Mill Updates and CNC Installation
|
| Area Setup, Prep, & Miscellaneous Work |
| Disassemble Mill: Done! |
| Get down the mill stand and set it up for working: Done! |
| Lap the Ways: Done! |
| Fill base with Epoxy Granite: Done! |
| Engineer a stronger column connection similar to Davo727's . Done! |
| Hockey Puck Levelers. Done! |
| Make the IH Z-Axis Modification. Done! |
| Fill column with Epoxy Granite. Done! |
| Engineer new pulley system and belts for X and Y axis to fit the larger servo shafts since stock pulleys won't work. Done! |
| Order new X and Y axis motor pulleys and belts from SDP-SI. Done! |
| One Shot Oiling System: Done! |
| Plumb one shot oiling in saddle. Done! |
| Mount one shot pump to column. Done! |
| One Shot Oiling on Z-Carriage. Done! |
| Y-Axis |
| Install ballscrew so Y servo drive is "on bracket". Done! |
| Install home/limit switch. Done! |
| Install belt and pulleys. Done! |
| Button up to finish Y-Axis drive. |
| X-Axis |
| Install ballscrew so X servo drive is "on bracket". Done! |
| Install home/limit switch. Done! |
| Install belt and pulleys. Done! |
| Button up to finish X-Axis drive. |
| Z-Axis |
| Install column on mill. Done! |
| Install ballscrew so Z servo drive is "on bracket". Done! |
| Install home/limit switch. Done! |
| Install belt and pulleys. Done! |
| Button up to finish Z-Axis drive. |
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Axis Modules
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| Cut heat sinks to size and mill shoulders. Done! |
| Purchase heat sink mounting hardware: 4-40 and 8-32. Done! |
| Drill and tap heatsinks. Done! |
| Make heatsink spacers. Done! |
| Make axis module front panels. Done! |
|
Populate components. Done! |
| Wire up axis modules. Done! |
| Wire power cords to servos. Done! |
| Test axis modules. Done! |
|
Electronics Enclosure
|
| Order DC power supply. Done! |
| Set up the wife's new computer so the old one can be used on the mill. In progress. Remaining work: Setup Outlook. Move data. |
| Order boards from CNC4PC. Done! |
| Remove the existing racking from inside the NEMA enclosure. Done! |
| Enclosure mounting holes for axis modules. Done! |
| Make a sub-chassis for the CNC4PC boards, limit switch board, and E-Stop relays for DC Supply and VFD. Done! |
| Order E-Stop, Start plunger, and status LED. Done! |
| Front panel with Start, E-Stop, and Status LED. Done! |
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Final Assembly
|
| Install way covers |
| Tune servos |
| Install mill spindle |
| Square the Mill Column |
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Tuning & Testing
|
| Axis direction of travel as expected? |
| Test Each Axis Travel Steps/Inch. Adjust as Needed. |
| Check Each Axis Backlash. Adjust as Needed. |
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Future Work
|
| Charge Pump |
| E-Stop Feedback to Mach3 |
| Build home switch board. |
| Wire home switches. What connectors? |
| Spindle board and VFD |
| Coolant board |
Need to Buy
All material © 2001-2009, Robert
W. Warfield.