13 --- Some Common Electrical Problems.
Note, This Section Only Applies to the Custom 18/30, Custom 30/30, Super 30/30,
and the Super 30/40 Machines that were the Most Common SAF's made.
It does Not Apply to the Hydraulic Machines like the Super 30/40 HD and Super 36/75.
Trouble-Shooters also need to Understand that SAF's were made for over 40 Years,
and there are Many Variations in Electrical Wiring, Electrical Components, and Mechanical Components used. You will need to Understand how it Works to Fix it.
You will Need a Maintenance Manual, Which has the Electrical Schematic in it,
to do any Trouble-Shooting. Manual also has More Trouble-Shooting Charts & Theory.
As a Rule, an Electrical Device Fails in 1 of 2 Ways;
--- It "Shorts" or "Short-Circuit" meaning Very-Low or No-Resistance.
--- It "Opens" or "Open-Circuit" meaning Very-High or Infinite-Resistance.
8A --- Fuse Blows when you Try to Punch in Single or Nibble Mode.
Caused by Shorted Punch Solenoid Coil, Normal Resistance is about 15 ohms.
8B --- No Punch in Single or Nibble Mode.
Caused by Open Punch Solenoid Coil, Normal Resistance is about 15 Ohms.
8C --- Machine will Punch with Tool Handle Open & and Not Locked-In.
Caused by Tool Handle Lock Switch being Shorted.
8D --- No Punch in Single or Nibble Mode.
Caused by Tool Handle Lock Switch being Open.
8E --- Punches OK in Nibble, but Blows Fuse 4FU and won't Punch in Single Mode.
Caused by Control Relay #1 Coil Short, Normal Resistance is about 250 Ohms.
8F --- Punches OK in Nibble, No Punch in Single.
Caused by Control Relay #1 Coil Open.
8G --- Varying Short to Normal Stroke in Single, Normal Operation in Nibble.
Caused by Limit Switch #1 Short.
8H --- No Punch in Single, Normal Operation in Nibble.
Caused by Limit Switch #1 Open.
8I --- Starts Nibbling when you Punch in Single Mode, must Turn-Off Machine to Stop.
Caused by Limit Switch #2 Short.
8J --- No Punch or Very Short Stroke in Single, Normal Operation in Nibble.
Caused by Limit Switch #2 Open.
8K --- Fuse 4FU Blows as Punch Ram starts to move down in Single or Nibble.
Caused by Control Relay #2 Coil Short, Normal Resistance is about 2000 Ohms.
8L --- Machine continues to Punch in Single as long as Foot Petal is Depressed.
Caused by Control Relay #2 Open, Normal Resistance is about 2000 Ohms.
8M --- No Punch in Single, but Nibble Punches Without Depressing the Footswitch.
Caused by Limit Switch #3 Short.
8N --- Constant Nibble Punching in Single Mode, Normal Operation in Nibble Mode.
Caused by Limit Switch #3 Open.
8O --- 1 Punch at Power-On. Punching in Nibble without depressing Footswitch.
Caused by Shorted Footswitch.
8P --- Will not Punch in Single or Nibble Mode.
Caused by Open Footswitch.
8Q --- 3-Phase Fuses Blow. Caused by;
-- Bad (Shorted) Flywheel Press-Drive Motor
-- Stalled Motor from Old Hardened Grease
-- Stalled Motor from Bad Crankshaft Bearings
-- Wrong A.C. Voltage
-- Shorted / Melted Step-Down Transformer. Caused by Wrong A.C. Voltage to Machine or Big-Loads Plugged-In to 110 VAC Machine Power Socket.
This External Power-Socket was made only for a 60 Watt Work-Light!
I sometimes Disconnect this Socket to Prevent this Common Problem.