MBC 1800 Series Machine

Problem Checks
Spindle Coasting to Stop Brake out of Adjustment (See operation Manual for adjustment procedure)
Brake Strap worn out
Spindle Pulley Dirty
Head Switch Sticking
 
Machine Not Shutting off at 0 Indicator Sticking (Remove indicator and press the plunger in and out plunger should be smooth and return quickly)
Indicator Not Set Correct (See Operations Manual for your machine)
Zero Shut off point needs Calibration (Adjust Zero shut off point by adjusting the two set screws on Trip Catch located just to the right of the feed dial)
 
Cannot Hold Size  Check Set-Up (Correct speeds and pressures and mandrel and stone combination)
Excessive End Play (Remove mandrel from machine and with high pressure on 4 and light cutting pressure on 0 push in and out on feed dial. The indicator needle should not move more than .0001)
Worn out Thrust Assembly (Check For excessive play)
Worn out Adjusting Nut (Check plunger for spring tension)
   
Low Coolant Pressure  Open Valve at Manifold
Check for Blinded Filter
Check for proper Oil level in tank
Check Swarf build up in tank
Check Relief Valve
Coolant Pump/Motor
 
Machine not Powering on Check E-Stop
Check Main Disconnect
Check In coming Power to Machine
Spindle Not Starting Check E-Stop
Check for Amber Light to be ON
Head Switch
Check Incoming Voltage
   
Cannot Hold Tool Alignment Wrong Adapter
Wrong Stone and mandrel
Incorrect Alignment Bushing
Cracked Inner Spindle Nose
Cracked Spindle Set Screw
Spindle Bearings Worn Out (Align a mandrel and remove the stone run 10 Air cycles and then reinstall the stone and check the tool alignment. Adjust if needed. Run 10 more air cycles and repeat if tool is constantly out then bearings may need to be replaced)
   
Stone Not Expanding Not Enough Cutting Pressure
Feed Rod Binding Up
Wedge bound up in Mandrel
 
Feed Dial Backing off during a Cycle Adjusting Nut Worn Out (Check plunger for tension)



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