<PAGE>
                                                                    EXHIBIT 24.1

                                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 2002 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
                                                     -------------------




<PAGE>


                                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 2002 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
                                                     ----------------------



<PAGE>


                                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 2002 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 M. Casper
                                                     ------------------



<PAGE>


                                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 2002 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
                                                     ---------------------



<PAGE>


                                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 2002 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
                                                     -------------------



<PAGE>


                                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 2002 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/ Robert C. Lannert
                                                     ---------------------


<PAGE>


                                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 2002 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
                                                     -------------------



<PAGE>


                                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 2002 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
                                                     -----------------



<PAGE>


                                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 2002 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 Pollnow
                                                     --------------------