PROCEDURE: CHECK FOR HIGH AXIS MOTOR CURRENT
Check for proper current draw + and - motion. See machine specification for correct current draw. Typically if X & Y are 3-5 amps, Z will be 3.6-6.5 amps (about 20-30% higher than X or Y). If current draw is too high, check the following:
Demagnetized Motor (If permanent magnet DC motor) Check motor specification.
Disconnect motor coupling from machine.
Run motor at specified speed and measure back EMF volts from A1 to A2
If out of specification, motor must be changed.
Tight gibbs, ball screw nut, thrust bearings or gear box. Check machine specification for torque to move axis.
Move axis with wrench and measure torque.
Loosen gibbs and measure torque again.
If still excessive, check gear box and nut for damage.
Crabbing of axis. Mount two dial indicators as far apart as possible on axis to be measured.
Set system up for .001" jog move at 5 IPM
Move table to indicators.
Zero both indicators.
Jog onto indicators while watching both indicators.
Check that both indicators move at the same time, and same amount.
Move .005" on (or until both indicators have moved a minimum of .002") then move back while watching indicators.
If machine is crabbing (both sides not moving at the same time) the usual cause is loose gibbs.
Lube system failure Check lube pump for proper operation.
Check for plugged lube lines.
Check to ensure proper way lubricant is being used for machine.
formerly Incon Systems Limited