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|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=Cold Metals
|hostarea=
}}
}}
Removed by owner
== Repair and Setup==
== Repair and Setup==
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.
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
# Remove the grinder from the pallet and align parallel to the long wall. Set up the materials storage and maybe plywood on the right side.
## Clean ways and check turcite for damage.
# Install a full wheel guard.
## Replace way wipers.
## 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.
# Fill lubrication tank with correct oil. Check that all oil lines are working.
# Install VFD.
# Develop an authorization plan.
# Develop an authorization plan.
# Set up dust collection.
== 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.
# 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.
# 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 ball ways need to be removed anytime the grinder is moved. This is necessary to prevent the races from Brinelling. To remove the ball ways, 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.
[[Category:Loaned Equipment]]