12 --- Some Common Electrical Problems. This Section Applies to Custom 18/30,
Custom 30/30, Super 30/30, Custom 30/40-Mechanical, and Super 30/40-Mechanical Machines. Does Not Apply to Hydraulic Machines Super 30/40HD and Super 36/75.
Trouble-Shooters need to Understand that SAF's were made for over 40 Years with
Many Variations in Electrical Wiring, Electrical Components, and Mechanical
Components. You need to Understand how it Works & a Maintenance Manual with
Electrical Schematic to do any Trouble-Shooting. Manual has Trouble-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.
--- Or It is Broken or Misadjusted or Miss-Wired or is Wrong Repacement Part.
12A --- Fuse Blows when you Try to Punch in Single or Nibble Mode. Caused by Shorted Punch Solenoid Coil or wiring, Normal Coil Resistance is about 15 Ohms.
12B --- No Punch in Single or Nibble Mode.
--- Caused by Open Punch Solenoid Coil, Normal Coil Resistance is about 15 Ohms.
--- Caused by Broken-Wire "Open" going to the Punch-Piston & Solenoid Coil.
--- Caused by Tool Handle Lock-Switch or Lock-Switch Wiring being Broken or Open.
--- Caused by Broken or Open Switch in Footswitch or Wiring to switch.
12C --- Machine Will Punch with Tool Handle Open and NOT Locked-In.
--- Caused by Tool Handle Lock-Switch being Shorted or By-Passed.
12D --- Punches OK in Nibble, but Blows Fuse 4FU and won't Punch in Single Mode.
--- Caused by Control Relay CR1 Coil Short, Normal Resistance about 250 Ohms.
--- Caused by Shorted-Wiring To or From Single Switch, 1LS, 2CR, 1CR Coil.
12E --- Punches OK in Nibble, No Punch in Single. Some Causes;
--- Limit Switch LS1 Open. LS1 is Normally-Open & Closes when Activated!
--- Limit Switch LS2 Open. LS2 is Normally-Closed & Opens when Activated!
--- Control Relay CR1 Failed or Coil Open, Coil About a Couple Hundred Ohms.
--- LS1 or LS2 Wired Wrong. LS1 is Normally-Open, LS2 is Normally-Closed
on most Later Machines, but Normally-Open on Very Early 1960's Machines!
--- Wrong Switches used, Switches Miss-Wired, or Switches Misadjusted.
12F --- Varying Short to Normal Stroke in Single, Normal Operation in Nibble.
Caused by Limit Switch LS1 Short. LS1 is Normally-Open & Closes when Activated!
12G --- Starts Nibbling when Punch in Single Mode, must Turn-Off Machine to Stop.
Caused by Limit Switch LS2 Short. LS2 is Normally-Closed & Opens when Activated!
12H --- Fuse 4FU Blows as Punch Ram starts to move down in Single or Nibble.
--- Caused by Burned-Out & Shorted Solenoid Coil, or Wiring to Solenoid Coil
--- Caused by Control Relay CR2 Coil Short, Normal Resistance About 2000 Ohms
12i --- Machine continues to Punch in Single as long as Foot Petal is Depressed.
--- Caused by Control Relay CR2 Open, Normal Resistance is About 2000 Ohms.
12J --- No Punch in Single, but Nibble Punches Without Depressing Footswitch.
Caused by Limit Switch LS3 Short. Note! Early Machines do Not have this LS3 Switch
which was Added to Eliminate Possibility of Double Punching in Singe-Punch Mode.
12K --- Constant Nibble Punching in Single Mode, Normal Operation in Nibble Mode.
--- Caused by Limit Switch LS3 Open.
12L --- 1 Punch at Power-On in Single or Punching in Nibble
without depressing Footswitch. --- Caused by Shorted Footswitch or Wiring
12M --- 3-Phase Fuses Blow. Caused by;
--- Wrong A.C. voltage to machine or motor & transformer not wired for correct voltage
--- Bad (Shorted) Press-Drive Motor
--- Stalled Motor from Bad Crankshaft Bearings or from Old Hardened Grease
--- Shorted / Melted Step-Down Transformer. Caused by Wrong A.C. Voltage to
Machine or Big-Loads Plugged-In to 120 VAC Machine Power Socket, like a
Cooling Fan. This Power-Socket was made ONLY for a 60 Watt Work-Light!
Note! Very Early 1960's Machines WITHOUT FRONT--LS3 Switch had LS2 Switch on
Right-Flywheel wired Normally-OPEN. Later Machines had Wiring Changed with
Front-LS3 Switch ADDED and LS2 Switch on Right-Flywheel wired Normally-CLOSED.
LS1 Switch on Left Flywheel has Always been wired Normally-OPEN.