Line 4: |
Line 4: |
| |model=Mitsui 250MH | | |model=Mitsui 250MH |
| |arrived=Late 2016 | | |arrived=Late 2016 |
− | |doesitwork=so close | + | |doesitwork=no |
| |contact=Dean Anderson | | |contact=Dean Anderson |
− | |where=Cold Metals | + | |where=Removed |
| |certification=yes | | |certification=yes |
| |hackable=no | | |hackable=no |
− | |value=~$3000}} | + | |value=~$3000 |
| + | |hostarea= |
| + | }} |
| | | |
− | == Repair == | + | Removed by owner |
| + | |
| + | |
| + | == Repair and Setup== |
| All repair needs to be coordinated with the area host. | | All repair needs to be coordinated with the area host. |
| | | |
| Motor bearings were replaced, to great success. | | Motor bearings were replaced, to great success. |
− | Ball ways and table are installed. The test grind on 4140PH went well. Good finish with no ripples. | + | Ball ways and table are installed. Test grinds are showing good repeatability. A grit and light parts catcher is installed on the left hand side. |
| | | |
− | # Remove saddle, clean ways and check turcite for damage. | + | # Remove saddle |
− | # Z ways need to be cleaned. | + | ## Clean ways and check turcite for damage. |
| + | ## Replace way wipers. |
| + | ## Fix y-axis oil lines. |
| + | ## Reinspect/regrind table and chuck. |
| + | # Clean Z ways. |
| # Replace Z way pleated covers. | | # Replace Z way pleated covers. |
− | # Fill lubrication tank with correct oil. Check that all oil lines are working. | + | # Install VFD. |
| + | # Develop an authorization plan. |
| + | # Set up dust collection. |
| | | |
− | == Diagnosis == | + | == Maintenance == |
| + | === Current Status === |
| + | The small electromagnetic sine chuck was mounted and ground in to less than a tenth on 2017-03-12. |
| + | |
| + | === Further Diagnosis === |
| After initial repair, diagnosis of further issues will come via a test grind. | | After initial repair, diagnosis of further issues will come via a test grind. |
| | | |
− | # The table will need to be ground in. | + | # The table may need to be ground in. |
− | # A mag chuck will need to be ground in. | + | # A mag chuck will need to be ground in and swept with an indicator. |
− | # Five block test can be used as a quick diagnosis. | + | # Five block test can be used as a rough diagnosis. |
| + | |
| + | === Procedures === |
| + | ==== Table Removal ==== |
| + | The table needs to be removed periodically to clean the grinding grit from the ways. |
| + | |
| + | The table is heavy. We need a system for lifting the table off of the saddle. The engine hoist doesn't work well. Perhaps a ceiling supported crane would work. |
| + | |
| + | # Remove the nut at the end of the cable on the right side under the table. Fasten a weight to the end of the cable to prevent the cable from unwinding on the capstan. |
| + | |
| + | ==== Moving the grinder ==== |
| + | ''Never move the grinder without coordinating with Dean, the owner.'' |
| + | |
| + | The two table ball cages need to be removed anytime the grinder is moved. This is necessary to prevent the races from Brinelling. To remove the ball cages, disconnect the X axis cable at each end of the table then prop up the ends of the table. |
| + | |
| + | [[Category:Loaned Equipment]] |