<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. Perkins and John M. Casper 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 2001 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
                                             --------------------------------
                                             Name: Charles F. Pollnow
                                                  ---------------------------
                                             Date: August 18, 2001
                                                  ---------------------------
<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. Perkins and John M. Casper 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 2001 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
                                             --------------------------------
                                             Name: John F. Logan
                                                  ---------------------------
                                             Date: August 15, 2001
                                                  ---------------------------
<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. Perkins and John M. Casper 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 2001 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
                                             --------------------------------
                                             Name: Lee M. Liberman
                                                  ---------------------------
                                             Date: September 13, 2001
                                                  ---------------------------
<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. Perkins and John M. Casper 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 2001 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
                                             --------------------------------
                                             Name: Charles A. Dill
                                                  ---------------------------
                                             Date: August 8, 2001
                                                  ---------------------------
<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. Perkins and John M. Casper 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 2001 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
                                             --------------------------------
                                             Name:  William H.T. Bush
                                                  ---------------------------
                                             Date: July 30, 2001
                                                  ---------------------------
<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. Perkins and John M. Casper 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 2001 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. Perkins
                                             --------------------------------
                                             Name: Stephen J. Perkins
                                                  ---------------------------
                                             Date: September 20, 2001
                                                  ---------------------------
<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. Perkins and John M. Casper 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 2001 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
                                             --------------------------------
                                             Name: James J. Kerley
                                                  ---------------------------
                                             Date: September 13, 2001
                                                  ---------------------------