Gecko jumper

[JMValios]

I'm in doubt.Inside my three G202 there is a jumper and I don´t know if I must touch that.Are connected pins 2-6 and 7-8 like picture below.
Some data: motors are eight wire in series 2.8V 4.5A
It seems jumper default is the right option, but I need some help.
Thanks,
JMValios

[bret4]

I'd like to hear more on this too.

[swarfmacdaddy]

What u step setting do you what?

[ger21]

The G202 only has one step setting. According to the manual, the jumper block settings are:

STANDBY ENABLED: JUMPER 2,6
STANDBY DISABLED: JUMPER 1,5
LOW RANGE: NO JUMPERS ON 1,2,5,6
MID-BAND DISABLED: JUMPER 3,7
NEMA 42 MOTOR: JUMPER 4,8
SPARE JUMPER ON 7,8

[bret4]

But what does it mean?

[ger21]

OPTION JUMER BLOCK: The G202 has four settable options. These options are enabled/disabled via the jumper block shunt settings. See the diagram below for how to set the shunts. The four options are described below.

(1) AUTO CURRENT REDUCTION: The G202 reduces motor phase current to 33% of the set value when the motor is stopped. If enabled, this reduction occurs 1 second after the last step pulse is sent to the drive. Auto current reduction can be enabled or
disabled.

(2) REDUCED CURRENT RANGE: In addition to the normal current range (1A to 7A), the G202 can also operate over a reduced current range (0.3A to 2A). This range is used for motor phase currents of less than 1A. Auto current reduction is not available for
this reduced current range.

(3) NEMA-42 MOTOR: Use this option if the drive is to be used with NEMA-42 frame size motors. This option adjusts the mid-band compensation circuit for optimum performance with this size motor.

(4) MID-BAND COMPENSATION DISABLE: Some step pulse sources generate very “ragged” timing. If the pulse-to-pulse period varies by more than +/-30%, the drive may have problems counting that step pulse. This option disables the mid-band compensation circuit, making the drive insensitive to this timing restriction. As a consequence, the motor may exhibit mid-band instability problems.

[JMValios]

At this time I don't know the correct settings
of my jumper block.
I must enable the two jumpers? (2-6 and 7-8)?

[bret4]

Thanks Gerry, great break down on what they do.

On the AUTO CURRENT REDUCTION. What is the reason for lowering the power? Would there be any problem with less holding power? Would the motors stay cooler when not moving?

Bret

[ger21]

Originally Posted by bret4 Thanks Gerry, great break down on what they do. On the AUTO CURRENT REDUCTION. What is the reason for lowering the power? Would there be any problem with less holding power? Would the motors stay cooler when not moving? Bret

I copied that from the manual.

Yes, it may cause problems, but it would depend on the application, and situation.
And yes, it would keep the motor cooler.