Application Note

Transitioning from IMx products

Description

Comparable in many ways, applications using an IM483 or IM805 may be transitioned to using the MForce Micro and PowerDrive products

Topics

  • System Upgrade

Applicable Product

  • MForce
  • Motion, Drives & Controllers

Requirements

MForce Micro or PowerDrive, Communications Cable

Resource Files

Details

Transitioning from IM483/IM805 to MForce Step/direction

When converting an application from IM483/IM805 drives to MForce Step and Direction drives, there are many considerations. These two systems have very similar stepper drive capabilities. The MForce’s current capability is listed in RMS Amps while the IM483/IM805 drives output currents were listed in Peak Amps. As a result, the MForce MicroDrive’s three amps RMS is very close to the IM483 4 amps PEAK and the MForce PowerDrive’s five amps RMS is very close the IM805’s seven amps PEAK. Another thing to keep in mind is that while the IM483/IM805 drives had short circuit protection on their phase outputs, the MForce drives do not. Both drive systems have a default of 256 microsteps per full step. The MForce MicroDrive’s heat sink should be mounted so that it conducts heat to the panel using the heat sink pad supplied with the drive. Mounting for the IM483/IM805 drives naturally connected the aluminum extrusion to the panel and a thermal pad was also sold as an option. These two systems have very different setup features and functions. For example, the IM483/IM805 drives use a resistor scheme to set both the run current and the hold current while the MForce Step and Direction drives use an SPI communications interface with a Windows GUI to make changes to these values that are stored in flash memory on the drive. The IM483/IM805 drives use a dip switch to set microstep resolution while that is also done using the Windows GUI on the MForce Step and Direction drives. Here is a listing of settable parameters for the MForce Step and Direction drives:

Parameter
Default
Range
Notes
MHC
5%
0 to 100%
Motor Hold Current (Reduction current)
MRC
25%
1 to 100%
Motor Run Current
MSEL
256
Full step to 256 µsteps/step
Microstep Resolution
ENACT
High
High/Low
Enable active state
HCDT
500 ms
0 to 65000
Hold Current Delay Time in milliseconds
DIR
CW
CCW/CW
Direction override CCW or CW
CLK TYPE
Step/Dir
0,1,2
0=step/dir, 1=clk up/CLK dn, 2=quadrature
CLK IOF
200ns (250MHz)
50 ns to 12.9 µs
(10 MHz to 38.8 kHz) Input clock filter
USER ID
IMS
Viewable ASCII
User identification code

To summarize, application requirements should be closely examined when considering this course of action. Please feel free to contact Technical Support with any questions you may have regarding any particular application.

Specifications Comparison

IM483 to MicroDrive

IM483 vs MForce MicroDrive
Figure 1: IM483 vs. MForce MicroDrive
Spec
IM483
MForce MicroDrive
Input Voltage [VDC]
12 … 48
12 … 48
Current [A RMS/PEAK]
2.8/4.0
3.0/4.2
Isolated inputs
Step, direction, enable and reset
Step, direction enable
Input Voltage [+VDC]
5
5 … 24
Input interface
Sinking
Sink or Source
Outputs
Fault, On-Full-Step
Connectivity
2 x 8-position screw terminals
12-position locking wire crimp (power and IO) 4-position locking wire crimp*
Run/hold current
Resistor network
Software commands
Microstep Resolution
4-position DIP switch
Software command
Communication Interface
SPI

The following additional items will be needed in order to perform an in-system swap: Communications Interface SPI converter cable: MD-CC300-001 or equivalent Power and I/O Interface Connector Kit: CK-03 (12-Pin Locking Wire Crimp) Prototype Cable: PD12-1434-FL3 Mfg Parts: Tyco: 1-794617-2 (shell) Tyco: 1-794610-1 (pins) Motor Interface Connector Kit: CK-06 (4-Pin Locking Wire Crimp) Prototype Cable: PD04-MF17-FL3 Mfg Parts: Tyco: 1445022-4 (shell) Tyco: 1-794610-1 (pins)

IM483 to PowerDrive

IM805 vs MForce PowerDrive
Figure 2: IM805 vs MForce PowerDrive
Spec
IM805
MForce PowerDrive
Input Voltage [VDC]
24 … 75
12 … 75
Current [A RMS/PEAK]
5.0/7.0
5.0/7.0
Isolated inputs
Step, direction, enable and reset
Step, direction enable
Input Voltage [+VDC]
5
5 … 24
Input interface
Sinking
Sink or Source
Outputs
Fault, On-Full-Step
Connectivity
2 x 8-position screw terminals
12-position locking wire crimp (power and IO) 4-position locking wire crimp*
Run/hold current
Resistor network
Software commands
Microstep Resolution
4-position DIP switch
Software command
Communication Interface
SPI

The following additional items will be needed in order to perform an in-system swap: Communications Interface SPI converter cable: MD-CC300-001 or equivalent Power and I/O Interface Connector Kit: CK-03 (12-Pin Locking Wire Crimp) Prototype Cable: PD12-1434-FL3 Mfg Parts: Tyco: 1-794617-2 (shell) Tyco: 1-794610-1 (pins) Motor Interface Connector Kit: CK-07 (4-Pin Locking Wire Crimp) Prototype Cable: PD04-MF34-FL3 Mfg Parts: Molex: 39-01-2045(shell) Molex: 44476-3112 (pins)