Barrel-shaped work (low ends) |
Work guides on entrance and exit sides deflect towards feed wheel |
Readjust entrance and exit guides |
Face of feed wheel not straight at contact point with work piece |
Properly dress feed wheel; be sure truing fixture is properly set |
Burned work |
Improper coolant flow |
Readjust nozzle |
Dull diamond glazing |
Replace diamond or rotate wheel |
Wheel too hard |
Replace wheel or make wheel act softer |
Dress rate too slow |
Increase diamond traverse rate |
Chatter |
Wheel out of balance |
Heavy dress or replace wheel |
Wheel not tight on spindle |
Tighten flanges spindle |
Blade angle too steep |
Change work blade |
Work too high above |
Readjust work blade center |
Work blade too thin or warped |
Replace blade |
Wheel too hard or too fine |
Replace wheel or make wheel act softer |
Glazed or loaded wheel |
Redress |
Blade not properly clamped |
Readjust blade |
Too heavy a cut |
Decrease stock removal rate |
Vibration transmitted to machine |
Check for vibration |
Concave work (low center)` |
Work guides on entrance and exit sides deflected toward the grinding wheel. Also see second cause above |
Readjust entrance and exit guides |
Erratic work sizes |
Gins not adjusted properly on upper and lower slides |
Readjust gibs |
Wear in in-feed screw and nut |
Repair infeed mechanism |
In-feed lever not held tight |
Tighten nut |
Insufficient lubrication on slides |
Provide proper lubrication |
Work blade loose |
Tighten blade |
Parts too hot (due to wheel and/or coolant) |
Change wheel, adjust coolant flow, or make wheel cut more freely |
Feed wheel camming |
Tighten collet screws, replace feed wheel bearings |
Feed Lines |
Grinding wheel not relived on exit side |
Dress wheel so it stops grinding 1/2" from exit table |
Work guides improperly set |
Readjust guides |
Wheel not uniform across face |
Redress |
Fish Tails |
Dirty coolant |
Replace coolant or filters |
Loose grit in wheel |
Redress wheel |
Out-of-round |
Work not high enough above center |
Readjust work blade |
Work piece bowed |
Pre-straighten work piece |
Feed wheel not round |
Properly redress feed wheel |
Blade angle not steep enough |
Change work piece |
Feed wheel too slow |
Increase feed wheel speed |
Poor Finish |
Improper wheel grade |
Proper adjustments are self_evident |
Dirty coolant |
Proper adjustments are self_evident |
Dress rate too fast |
Proper adjustments are self_evident |
Jumpy, erratic dressing traverse rate |
Proper adjustments are self_evident |
Dull diamond |
Proper adjustments are self_evident |
Diamond loose |
Proper adjustments are self_evident |
Blade not tight |
Proper adjustments are self_evident |
Blade angle too steep |
Proper adjustments are self_evident |
Pick-up on blade |
Proper adjustments are self_evident |
Oil or loading on wheel face |
Proper adjustments are self_evident |
Feed wheel loose |
Proper adjustments are self_evident |
Feed wheel speed too high |
Proper adjustments are self_evident |
Work too high above center |
Proper adjustments are self_evident |
Scored Work |
Pick-up blade (dirt, chips, abrasive) |
Use coolant with greater lubricity or change work |
Straight taper on work |
Work guides improperly set |
Readjust guides |
Blade not level |
Readjust blade |
Loose gibs |
Adjust and tighten gibs |
Parts not end to end in through feed |
Adjust feed rate |
Parts too hot (due to in through feed wheel and/or coolant) |
Change wheel, adjust coolant flow or make wheel cut more freely |
Taper on rear |
Work guides on exit end of work deflected toward the feed wheel. Also see second cause in #8 |
Readjust exit guides |
Work not straight |
Work not straightened sufficiently before grinding |
Pre-straighten work piece |
Too much stock removal on a previous or prior passes |
Adjust stock removal rates |
Parts too hot (due to wheel and/or coolant) |
Change wheel, adjust coolant flow or make wheel cut more freely |