Agitator Motor and Controller

Table of Contents:

Page Status

Date	Initials	Change
May 19, 2021	SG	Added link to operational modes spreadsheet

Relevant Devices

Description	Qty	Source	Part Number
Motor Controller	1	Galil	DMC-30012-BOX (ISCNTL)
Motor and Encoder	1	Galil	BLM-N23-50-1000-B
Power Supplies¹	2	Galil	PS-2.50-24
Power Cable	1	Galil	PWRCBL-30012-ISCNTL

1: the option was chosen to use two power supplies: one powers the controller and one powers the motor.

Relevant Functional Block Diagram

Software Actions

	Action	Notes
1	Turn on motor	Will occur just before start of spectrometer exposure.
2	Turn off motor	Will occur during readout of spectrometer exposure.
3

Operational Modes

Link to Agitator tab within Operational Modes Spreadsheet

Required Adjustable Settings

Setting	When Needed
	Build	Observing	Maintenance
Motor speed	YES	NO	MAYBE

Required Telemetry

Parameter

Report Frequency

Purpose

Notes

1

Motor RPM

once per minute (TBC)

Ensures agitator is running properly

When the encoder is mounted on the motor, it rotates in the same direction as the motor.

In the final design of the agitator, the encoder will be removed from the motor. It will be installed on a separate shaft that will rotate in the opposite direction of the motor.

Noted here as the Galil-related software might need to address this internally.

2

Motor current

once per minute (TBC)

Ensures agitator is running properly
Higher motor current could indicate wear or snags

Suggestion from Galil (email to SG):

“You can monitor the commanded current via the Tell Torque command (TT). This monitors the commanded torque or motor command signal that we are sending to the amplifier. This signal is a -10V to +10V signal. Using this with the amplifier gain (AG command) you can find what the command current is.

For example, if TTA = 2V and AGA=1 (corresponding to 0.8A/V), the commanded current to the motor is 1.6A (TT*AG or 2*0.8). Please take a look at the TT and AG commands in the controller command reference for more details.”

Required Alarms

	Parameter	Threshold	Notes
1	Motor RPM low	TBD
2	Motor current high	TBD

Relevant Datasheets & Manuals

Description

File

Source

1

Galil DMC-3x01x Datasheet

http://www.galilmc.com/motion-controllers/single-axis/dmc-3x01x#info=0

2