Difference between revisions of "Mitsui Surface Grinder"
(→Repair and Setup: Chuck was last ground on 2017-03-12.) |
(Current status) |
||
| Line 23: | Line 23: | ||
## Replace way wipers. | ## Replace way wipers. | ||
## Fix y-axis oil lines. | ## Fix y-axis oil lines. | ||
| + | ## Reinspect/regrind table and chuck. | ||
# Clean Z ways. | # Clean Z ways. | ||
# Replace Z way pleated covers. | # Replace Z way pleated covers. | ||
| Line 30: | Line 31: | ||
== Maintenance == | == Maintenance == | ||
| − | === Diagnosis === | + | === 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. | ||
| Line 37: | Line 41: | ||
# Five block test can be used as a rough diagnosis. | # Five block test can be used as a rough diagnosis. | ||
| − | === Table Removal === | + | === Procedures === |
| + | ==== Table Removal ==== | ||
The table needs to be removed periodically to clean the grinding grit from the ways. | The table needs to be removed periodically to clean the grinding grit from the ways. | ||
| Line 44: | Line 49: | ||
# 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. | # 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 === | + | ==== Moving the grinder ==== |
''Never move the grinder without coordinating with Dean, the owner.'' | ''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. | 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. | ||
Revision as of 19:01, 16 March 2017
| File:Mitsui250mh.jpg | |
| Owner/Loaner | Dean Anderson |
|---|---|
| Serial Number | {{{serial}}} |
| Make/Model | Mitsui 250MH |
| Arrival Date | Late 2016 |
| Usability | yes |
| Contact | Dean Anderson |
| Where | Cold Metals |
| Authorization Needed | yes |
| Hackable | no |
| Estimated Value | ~$3000 |
| Host Area | Cold Metals |
Repair and Setup
All repair needs to be coordinated with the area host.
Motor bearings were replaced, to great success. 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.
- Replace way wipers.
- Fix y-axis oil lines.
- Reinspect/regrind table and chuck.
- Clean Z ways.
- Replace Z way pleated covers.
- Install VFD.
- Develop an authorization plan.
- Set up dust collection.
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.
- The table may 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 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.