DASL: Weekly Update 2007-07-11

 

I have successfully completed the following items:

 

-Connected the NI-USB-6211 DAQ, NI-DAQ, to my Windows XP computers.

 

-Connected E4P-300-250 Optical encoder to the NI-DAQ and got it give an accurate angular measurement with Labview 8.x.

 

-Wrote the tutorials for the latter two objectives, see link below.

http://www.pages.drexel.edu/~dml46/DASL/Tutorial_Main.html

 

-I contacted Kathie Donahue about putting me on payroll.  She asked if I was work study and I replied no.  She then forwarded my message to Jessica Atchison, supervisor of work-study for the department, to put my paperwork through.  I have not heard back from anyone since July 10th.

 

-I contacted Keith about getting ftp access and lab access.  I successfully received ftp access but he has not yet gotten back to me about lab access.

 

-I have to contact Keith about how our websites work, aka what is our root directory that the public can access, for when I posted a test page up I had to log in to see it.  As of now I have just added a DASL section to my website hosted by Drexel University IRT.  See link below

http://daniellofaro.webhop.org/

 

-In regards to parts I have recommend the following: (also see part list table below)

 

I would like to get the EPU9 motor from Maxx, see link below.  I would like to get at least two (2) of these for testing purposes.

http://www.maxxprod.com/mpi/mpi-10a.html

 

I would also like to get at least (2) samples of each of the power OpAmps OPA548 and OPA549.  See links below

 

OPA548: http://focus.ti.com/docs/prod/folders/print/opa548.html

OPA549: http://focus.ti.com/docs/prod/folders/print/opa549.html

 

I will use the same type of wheels that you have placed on the cart that you gave me, see item on parts list, and I will use plastic from the shop area to make the body.  Fine thread screws with washers will be used for the axels of the wheels.

 

I will also use the E4P-300-250 Optical Encoder as recommended.  Each unit was going to use two of these encoders thus I will need three more of them., as well as three more wires to hook up to the encoders.  I wanted to make two carts, one to test fabrication and the other for the completed design. 

 

Parts list for inverted pendulum as of 2007-07-10

 

 

 

 

Item Description

Manufacturer

Product Link

Part Number

Price (2007)

Quantity

Geared Motor

Maxx

http://www.maxxprod.com/mpi/mpi-10a.html

EPU9

$15.95

2

Power Opamp

TI

http://focus.ti.com/docs/prod/folders/print/opa548.html

OPA548

Sample

<2

Power Opamp

TI

http://focus.ti.com/docs/prod/folders/print/opa549.html

OPA549

Sample

<2

Wheels 1-1/2" (2)

Dave Brown /  Tower Hobbies

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXB904&P=0

LXB904

$4.29

2

Optical Encoder

USDigital

http://www.usdigital.com/products/e4p/

E4P-300-250

$19.95

4

Encoder Wire Head

USDigital

http://www.usdigital.com/products/connect/4pin-micro.shtml

CON-MIC4

$3.15

4

Encoder Wire

USDigital

http://www.usdigital.com/products/connect/4pin-micro.shtml

CA-3285-1FT

$5.25

4

 

 

Goals for next week:

 

My goals for this coming week are as follows:

-         Contact Keith to gain access to the lab

-         Contact Keith to schedule a time with someone to show me where and how to use the machine shop.

-         Have a mechanical schematic drawn up for the body of the pendulum.

-         Have an electrical schematic drawn up for the system.

-         If I have been shown how to use the machine shop equipment, build the body as depicted in the schematic.