2
November 2006
Features
Introduction
The MBC25PG1(L) microstep driver/pulse generator has an output current capability of 0.5A minimum to
2.5A maximum (peak rating). The MBC25PG1(L) driver operates with a DC voltage of 12VDC to 35VDC.
The logic inputs can be operated from +5VDC minimum to +24VDC maximum. The MBC25PG1(L)’s in-
ternal PG (pulse generator) is a linear ramping PG designed to be used with this driver. It has adjustable
base speeds and max speeds, independent adjustments for acceleration (ramping up) and deceleration
(ramping down), jumper selectable external or on-board max speed potentiometer and a jumper selectable
deceleration profile. The MBC25PG1(L) also has an avialable clock output of its internal pulse generator
that can be used for daisy chaining drivers together. The MBC25PG1(L) driver features direction control
and motor current On/Off capabilities. The “Reduce Current Enabled” feature automatically reduces
motor current to 70% of the set value. The driver has built in features to indicate power on (green LED)
and clocks being received (yellow LED). The MBC25PG1(L) has various step resolutions that can be
implemented by using the on-board dip switch. These divisions range from 200 steps/rev to 1600 steps/
rev. The bipolar drive configuration handles 4, 6, and 8 lead step motors and is also equipped with short
circuit, over temperature and crossover current protection.
Ramping
There are separate adjustments for acceleration and deceleration. The ramp times are adjustable from 50
milliseconds to 1.0 seconds. This is the time it takes to ramp from the lowest base speed to the highest max
speed. In terms of acceleration units, the accel/decel rates are adjustable from 5,000 steps/s
2
to 100,000
steps/s
2
on the low speed range and from 20,000 steps/s
2
to 400,000 steps/s
2
on the high speed range.
Note:
It is possible to have a max speed that is lower than the base speed.
Speed Ranges
The internal PG has an adjustable base speed (starting speed) and two adjustable maximum speeds (run-
ning speed). The base speed is adjusted using the on-board potentiometer, while the maximum speeds
are adjusted using either the on-board or external potentiometer, which is chosen by using jumper JP4.
To use the on-board potentiometer, set JP4 in position 2-3. To use the external potentiometer, set JP4 in
position 1-2. The following chart shows the speed ranges of the pulse generator. Jumper JP6 is used to
switch between the set speeds.
• Output Current of 2.5A Peak
• 200 to 1600 Steps/Revolution (1, 2, 4 and 8 Selectable Step Operation)
• Drives Two Motors In Series
• On-Board Pulse Generator
• Pulses From 50Hz to 44kHz
• Clock Output for Daisy Chaining
• Motor On/Off Input
• Short Circuit Protection
Speed Range
Base Low
Base High
Max Low
Max High
JP6
1
50Hz
2.5kHz
70Hz
11kHz
Open
2
100Hz
5kHz
100Hz
22kHz
1 & 2
3
200Hz
10kHz
200Hz
44kHz
2 & 3
July 2018
July 2018
