Mitsubishi LT2-2230 User Manual

ADJUSTMENT AND OPERATION OF CONTROL UNIT
I4 I Adjusting the stitching speed
1. Adjusting the maximum stitching speed
1) Adjustmentof maximum speed (Speedachievedby fully depressing the pedal)
Twovariable resistors are avilableforadjustment ofthe maximum speed: one is located in the control
boxandthe other isonthe controlboxfrontpanel.Thevariableresistoronthe controlboxfront(external
VR) permits adjustment of speed within the range from the low (minumum) speed to the maximum
speed set by the internal variable resistor H.
The internal variable resistor His factory-set as shown in the followingtable:
Internal Variable Resistor H Setting
External Variable Resistor Adjustable Range
3700 rpm (LT2-2230-L, M)
3000 rpm (LT2-2230-B)
Maximum speed to 200 spm
Forspeed setting out ofthe adjustable range of the external variableresistor, the setting of internal
variable resistor H must be changed.
For fine speed adjustment, use a speed meter.
CAUTION
Evenifa larger motor pulleywith a muc largerdiameter is used, the speed set bythe two variableresistors
cannot be increased.
2) Adjustmentof lowspeed (Speedachievedbyslightlydepressing the pedal)
The low speed can be adjusted by the internal variable resistor L.
Speed increases
when the internal variable resistor Lis turned clockwise, and decreases when turned
counterclockwise.
The adjustable range is 160 to 320 spm. (Factory-set to 200 spm.)
Internal variable resistors for speed setting . . ,
^ ^ "1-2 POSITION" select switch
L P T H H
o„
SPEED
L (Low speed)
P (Positioning speed)
T (Thread trimming speed)
H (High speed)
M (Medium speed) Adjustment ofSpeeds
3) Positioning speed
The positioning speed is adjustable with the internal variable resistor P.
Clockwise turn increases the speed and counterclockwise turn decreases. The adjustable range is 160
to 320 spm. (Factory-set to 250 spm.)
4) Adjustment of thread trimming speed
The internal variable resistor T permits the adjustment of thread trimming speed. The speed increases
when the internal variable resistor T is turned clockwise, and decreases when turned counterclockwise.
(Factory-set to 175 spm.)
Since thread trimming speed may differ depending on nachines, refer to the instruction manual if the
sewing machine of consult our service agency for readjustment of thread trimming speed.
5) Adjustment of backtacking speed
When an control switch panel (option) is used for backtacking, backtacking speed (medium speed) can be
adjusted by the internal variable resistor M. Adjust the backtacking speed after the adjustment of
maximum speed. It should be noted
that if the maximum speed is adjusted after the adjustment of
backtacking speed, the set backtacking speed will vary.
-22-
Speed setting external variable resistor
From the library of: Superior Sewing Machine & Supply LLC

Mitsubishi LT2-2230 Specifications

General

Brand	Mitsubishi
Model	LT2-2230
Category	Sewing Machine
Language	English