<PAGE>   1
                                                                    EXHIBIT 24.0


                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, THAT EACH PERSON WHOSE SIGNATURE APPEARS
BELOW CONSTITUTES AND APPOINTS EACH OF STEPHEN J. GORE AND BRUCE P. ERDEL AS HIS
TRUE AND LAWFUL ATTORNEY-IN-FACT AND AGENT, EACH WITH FULL POWER OF
SUBSTITUTION, FOR HIM AND IN HIS NAME, PLACE AND STEAD, IN ANY AND ALL
CAPACITIES, TO SIGN THE 2000 ANNUAL REPORT ON FORM 10-K OF DT INDUSTRIES, INC.,
AND TO FILE THE SAME WITH ALL EXHIBITS THERETO, AND OTHER DOCUMENTS IN
CONNECTION THEREWITH, WITH THE SECURITIES AND EXCHANGE COMMISSION, GRANTING UNTO
EACH SAID ATTORNEY-IN-FACT AND AGENT FULL POWER AND AUTHORITY TO DO AND PERFORM
EACH AND EVERY ACT AND THING REQUISITE AND RATIFYING AND CONFIRMING ALL THAT
EACH SAID ATTORNEY-IN-FACT AND AGENT OR HIS SUBSTITUTE OR SUBSTITUTES MAY
LAWFULLY DO OR CAUSE TO BE DONE BY VIRTUE HEREOF.


                                            /s/ James J. Kerley
                                            -----------------------------
                                            Print Name: James J. Kerley
                                            Date: October 9, 2000








                                       67
<PAGE>   2
                                                                    EXHIBIT 24.0


                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, THAT EACH PERSON WHOSE SIGNATURE APPEARS
BELOW CONSTITUTES AND APPOINTS EACH OF STEPHEN J. GORE AND BRUCE P. ERDEL AS HIS
TRUE AND LAWFUL ATTORNEY-IN-FACT AND AGENT, EACH WITH FULL POWER OF
SUBSTITUTION, FOR HIM AND IN HIS NAME, PLACE AND STEAD, IN ANY AND ALL
CAPACITIES, TO SIGN THE 2000 ANNUAL REPORT ON FORM 10-K OF DT INDUSTRIES, INC.,
AND TO FILE THE SAME WITH ALL EXHIBITS THERETO, AND OTHER DOCUMENTS IN
CONNECTION THEREWITH, WITH THE SECURITIES AND EXCHANGE COMMISSION, GRANTING UNTO
EACH SAID ATTORNEY-IN-FACT AND AGENT FULL POWER AND AUTHORITY TO DO AND PERFORM
EACH AND EVERY ACT AND THING REQUISITE AND RATIFYING AND CONFIRMING ALL THAT
EACH SAID ATTORNEY-IN-FACT AND AGENT OR HIS SUBSTITUTE OR SUBSTITUTES MAY
LAWFULLY DO OR CAUSE TO BE DONE BY VIRTUE HEREOF.


                                          /s/ John F. Logan
                                          --------------------------
                                          Print Name: John F. Logan
                                          Date: August 11, 2000




                                       67
<PAGE>   3
                                                                    EXHIBIT 24.0


                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, THAT EACH PERSON WHOSE SIGNATURE APPEARS
BELOW CONSTITUTES AND APPOINTS EACH OF STEPHEN J. GORE AND BRUCE P. ERDEL AS HIS
TRUE AND LAWFUL ATTORNEY-IN-FACT AND AGENT, EACH WITH FULL POWER OF
SUBSTITUTION, FOR HIM AND IN HIS NAME, PLACE AND STEAD, IN ANY AND ALL
CAPACITIES, TO SIGN THE 2000 ANNUAL REPORT ON FORM 10-K OF DT INDUSTRIES, INC.,
AND TO FILE THE SAME WITH ALL EXHIBITS THERETO, AND OTHER DOCUMENTS IN
CONNECTION THEREWITH, WITH THE SECURITIES AND EXCHANGE COMMISSION, GRANTING UNTO
EACH SAID ATTORNEY-IN-FACT AND AGENT FULL POWER AND AUTHORITY TO DO AND PERFORM
EACH AND EVERY ACT AND THING REQUISITE AND RATIFYING AND CONFIRMING ALL THAT
EACH SAID ATTORNEY-IN-FACT AND AGENT OR HIS SUBSTITUTE OR SUBSTITUTES MAY
LAWFULLY DO OR CAUSE TO BE DONE BY VIRTUE HEREOF.

                                                     /s/ Lee M. Liberman
                                                     ---------------------------
                                                     Print Name: Lee M. Liberman
                                                     Date: August 10, 2000


                                       67
<PAGE>   4
                                                                    EXHIBIT 24.0

                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, THAT EACH PERSON WHOSE SIGNATURE APPEARS
BELOW CONSTITUTES AND APPOINTS EACH OF STEPHEN J. GORE AND BRUCE P. ERDEL AS
HIS TRUE AND LAWFUL ATTORNEY-IN-FACT AND AGENT, EACH WITH FULL POWER OF
SUBSTITUTION, FOR HIM AND IN HIS NAME, PLACE AND STEAD, IN ANY AND ALL
CAPACITIES, TO SIGN THE 2000 ANNUAL REPORT ON FORM 10-K OF DT INDUSTRIES, INC.,
AND TO FILE THE SAME WITH ALL EXHIBITS THERETO, AND OTHER DOCUMENTS IN
CONNECTION THEREWITH, WITH THE SECURITIES AND EXCHANGE COMMISSION, GRANTING UNTO
EACH SAID ATTORNEY-IN-FACT AND AGENT FULL POWER AND AUTHORITY TO DO AND PERFORM
EACH AND EVERY ACT AND THING REQUISITE AND RATIFYING AND CONFIRMING ALL THAT
EACH SAID ATTORNEY-IN-FACT AND AGENT OR HIS SUBSTITUTE OR SUBSTITUTES MAY
LAWFULLY DO OR CAUSE TO BE DONE BY VIRTUE HEREOF.



                                             /s/ Charles A. Dill
                                             -----------------------
                                             Print Name: Charles A. Dill
                                             Date: August 8, 2000



                                       67
<PAGE>   5
                                                                    EXHIBIT 24.0
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, THAT EACH PERSON WHOSE SIGNATURE APPEARS
BELOW CONSTITUTES AND APPOINTS EACH OF STEPHEN J. GORE AND BRUCE P. ERDEL AS
HIS TRUE AND LAWFUL ATTORNEY-IN-FACT AND AGENT, EACH WITH FULL POWER OF
SUBSTITUTION, FOR HIM AND IN HIS NAME, PLACE AND STEAD, IN ANY AND ALL
CAPACITIES, TO SIGN THE 2000 ANNUAL REPORT ON FORM 10-K OF DT INDUSTRIES, INC.,
AND TO FILE THE SAME WITH ALL EXHIBITS THERETO, AND OTHER DOCUMENTS IN
CONNECTION THEREWITH, WITH THE SECURITIES AND EXCHANGE COMMISSION, GRANTING UNTO
EACH SAID ATTORNEY-IN-FACT AND AGENT FULL POWER AND AUTHORITY TO DO AND PERFORM
EACH AND EVERY ACT AND THING REQUISITE AND RATIFYING AND CONFIRMING ALL THAT
EACH SAID ATTORNEY-IN-FACT AND AGENT OR HIS SUBSTITUTE OR SUBSTITUTES MAY
LAWFULLY DO OR CAUSE TO BE DONE BY VIRTUE HEREOF.



                                             /s/ Charles F. Pollnow
                                             -------------------------------
                                             Print Name: Charles F. Pollnow
                                             Date: July 31, 2000



                                       67
<PAGE>   6
                                                                    EXHIBIT 24.0

                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, THAT EACH PERSON WHOSE SIGNATURE APPEARS
BELOW CONSTITUTES AND APPOINTS EACH OF STEPHEN J. GORE AND BRUCE P. ERDEL AS
HIS TRUE AND LAWFUL ATTORNEY-IN-FACT AND AGENT, EACH WITH FULL POWER OF
SUBSTITUTION, FOR HIM AND IN HIS NAME, PLACE AND STEAD, IN ANY AND ALL
CAPACITIES, TO SIGN THE 2000 ANNUAL REPORT ON FORM 10-K OF DT INDUSTRIES, INC.,
AND TO FILE THE SAME WITH ALL EXHIBITS THERETO, AND OTHER DOCUMENTS IN
CONNECTION THEREWITH, WITH THE SECURITIES AND EXCHANGE COMMISSION, GRANTING UNTO
EACH SAID ATTORNEY-IN-FACT AND AGENT FULL POWER AND AUTHORITY TO DO AND PERFORM
EACH AND EVERY ACT AND THING REQUISITE AND RATIFYING AND CONFIRMING ALL THAT
EACH SAID ATTORNEY-IN-FACT AND AGENT OR HIS SUBSTITUTE OR SUBSTITUTES MAY
LAWFULLY DO OR CAUSE TO BE DONE BY VIRTUE HEREOF.



                                             /s/ Stephen J. Gore
                                             -----------------------
                                             Print Name: Stephen J. Gore
                                             Date: July 25, 2000



                                       67
<PAGE>   7
                                                                    EXHIBIT 24.0

                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, THAT EACH PERSON WHOSE SIGNATURE APPEARS
BELOW CONSTITUTES AND APPOINTS EACH OF STEPHEN J. GORE AND BRUCE P. ERDEL AS
HIS TRUE AND LAWFUL ATTORNEY-IN-FACT AND AGENT, EACH WITH FULL POWER OF
SUBSTITUTION, FOR HIM AND IN HIS NAME, PLACE AND STEAD, IN ANY AND ALL
CAPACITIES, TO SIGN THE 2000 ANNUAL REPORT ON FORM 10-K OF DT INDUSTRIES, INC.,
AND TO FILE THE SAME WITH ALL EXHIBITS THERETO, AND OTHER DOCUMENTS IN
CONNECTION THEREWITH, WITH THE SECURITIES AND EXCHANGE COMMISSION, GRANTING UNTO
EACH SAID ATTORNEY-IN-FACT AND AGENT FULL POWER AND AUTHORITY TO DO AND PERFORM
EACH AND EVERY ACT AND THING REQUISITE AND RATIFYING AND CONFIRMING ALL THAT
EACH SAID ATTORNEY-IN-FACT AND AGENT OR HIS SUBSTITUTE OR SUBSTITUTES MAY
LAWFULLY DO OR CAUSE TO BE DONE BY VIRTUE HEREOF.



                                             /s/ William H. T. Bush
                                             ---------------------------------
                                             Print Name: William H. T. Bush
                                             Date: July 26, 2000



                                       67