4 -- Nearby Welding, Especially Hi-Frequency TIG Welding, will cause many control problems, like jumping position, program & memory problems, control resetting, Etc.
Keep All Welders Far Away from All CNC Machines!
5 -- Make sure you have a Good 8-Foot Ground Rod Installed at Back of Machine,
and that the Ground Strap-Wire Connections are Tight!
6 -- Check Servo Motor. If the Brushes are Worn to Half Original length, replace them all. Badly Burnt Commutator & Brushes will cause Rough & Erratic Servo Movement.
If Brushes are so Completely Worn-Out that Metal Brush-Springs are Burning into the Copper Commutator, and Commutator has Rough, Burnt, & Deep Worn Spots,
it is time to Buy a New Motor! Take better care of the New Servo Motor.
7 -- If you get a Red-LED Light On in the Servo Drive, it means Over-Current!!!
Caused by --- Burnt-Out Servo Motor
--- Shorted Wires between the Servo Drive and Servo Motor
--- Shorted Servo Drive Circuit Boards
8 -- People like to Blame the CNC Control (Because We Blame what we Don't Understand), but 4 out of 5 Problems are Actually caused by Something Mechanical (Not Electronic) that is Broke, Worn, Loose, or Out of Adjustment on the Machine.
But some Problems are indeed caused by the CNC Control.
Note!!! Strippit made Many Slightly Different Types of the Same Basic Boards! I Often find Problems caused by the Wrong Type Circuit Boards in a Customers Control. Customers with Multiple Machines, or have a Used Machine that came from a Shop
that had Multiple Machines, are Infamous for Having Incorrect Boards in their Controls.
When Replacing Circuit Boards, Make Sure Board Assembly Number is the Same!
Different Dash ( -000, -100, -200, Etc. ) Number Boards are NOT Interchangeable!
Axis Control Boards, usually do Not go Bad, but are Easy to Test;
On HECC80/1 Type Controls, you can Swap the #400470-000 Axis Control Boards between X Slot# 12, Y Slot# 13, T Slot# 14, and see if Problem goes to Different Axis.
On HECC80/30x Controls, you can Swap #400470-100 Axis Control Boards between
the X Slot# 16, Y Slot# 17, and T Slot# 18.
9 -- Swap Position Comparator Boards.
For HECC80/1 Controls, X Slot# 15, Y Slot# 16, T Slot# 17.
Note! Early HECC80/1 used #400474-000 boards, 2MHZ Square-Wave Type, has C1 Cap
Later HECC80/1 used #400474-200 boards, 3MHZ Square-Wave Type, no C1 Cap.
Late HECC80/1 used #400474-300 boards, 3MHZ Sine-Wave Type, 75k R4, no C1
HECC80/30x Controls used #400474-100 boards in X Slot# 19, Y Slot# 20, T Slot# 21.
10 -- Resolver Excitation Board could be Bad. A Good Technician with a Oscilloscope can usually Test it on your Machine. Or Send-In your Circuit Boards to Us, and we can Quickly Test, Up-Date, & Repair them, with Final Test in one of our Strippit Machines.
HECC80/1 Resolver Excitation Board is in Slot# 19. 3 Different types were used;
#400468-000 2MHZ Square-Wave
#400468-300 3MHZ Square-Wave
#400272-100 3MHZ Sine-Wave
HECC80/30x used #400272-000 3MHZ Sine-Wave Board in Slot# 23.
11 -- Phase Analog Board could be Bad, but are Hard to Test. HECC80/1 Slot# 18.
#400482-000 Early FC1250/30/1500 with 2MHZ Boards
#400482-100 Early FC1000/2 & FC750 with 2MHZ Boards
#400482-200 Early FC1250/45 with 2MHZ Boards
#400482-300 FC1000/2 with 3MHZ Boards
#400482-301 FC1250/30/1500 & FC1250/45 with 3MHZ Boards
#400482-600 FC750/2 with 3MHZ Boards, and Nibble-Drift Retrofits on FC750
HECC80/30x Controls used #400482-400 Board in Slot# 22.
12 -- "Overshooting" is when a Axis Speeds Past it's New Position by an Inch or So,
then Jerks-Back Violently to the Proper Position. Several Possible Causes;
A -- Weak or Bad Servo Motor
B -- Improperly Tuned Servo Drive
C -- Wrong Compensation Caps & Resister on PWMC Servo Control Boards
D -- Wrong Type Board in Servo Drive, like PWMP2 where PWMP3 should be in Y-Axis
E -- Wrong Type Boards in Control
F -- Improperly Tuned Control Boards
G -- Bad Connections & Bad Current-Sense Resistor will Limit Current & Motor Torque
H -- Low Servo Power Supply Voltage