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Forums: forums.parallax.com 
Sales: [email protected] 
Technical: [email protected] 
 

 
Office: (916) 624-8333 
Fax: (916) 624-8003 
Sales: (888) 512-1024 
Tech Support: (888) 997-8267 
 

 

Gripper Kit (#28202) for Boe-Bot or ActivityBot Robots  

 

The Gripper Kit

  

 

This kit allows your Parallax Boe-Bot (#28132 & #28832) or ActivityBot 
(#32500) robot to pick up objects. Note: robots are sold separately. This kit 
is not compatible with the Shield-Bot for Arduino (#130-35000 & #32335). 
 
Before getting started, take an inventory of the parts in your kit. Use 

Fig #1

 

to identify each part to the parts list. Once you have inventoried your kit, 
proceed to 

Step #1

     

 

 

Parts List 

 

Item  Qty 

Description 

 

(1) 

hinge mount 

(1) 

dowel pin 

(2) 

linkage plate 

(4) 

Gripper link 

(8) 

#4 x 1” spacer 

(2) 

Gripper plate 

(8) 

4-40 x 1.25” screw 

(15) 

4-40 hex nut 

(1) 

spring 

10 

(2) 

control arm  

11 

(1) 

Parallax Standard Servo 

12 

(1) 

actuator rod 

13 

(2) 

Brass E-Z Connector 

14 

(8) 

foam tape 

15 

(9) 

4-40 x 1/4” screw 

16 

(2) 

servo bracket 

17 

(4) 

4-40 x 3/8" screw 

18 

(2) 

4-40 lock-nut (not shown) 

19 

(4) 

#4 x 1.25” standoff  

                     (not shown) 

 

 
 

Fig #1

 

 

 

Recommended Tools 

 

 

Pliers 

 

Phillips #2 point screwdriver 

 

Small flat-blade screwdriver 

 

A sharp-tipped hobby knife,  

      such as an X-Acto

®

 knife  

      -OR- 
      A hand drill with 5/64

 bit  

 

WARNING!  

 
DO NOT use electric 
screwdrivers with this kit. Please 
assemble using hand tools only 
to avoid damaging your Gripper. 

 

Copyright © Parallax Inc.

 

 

Gripper Kit (#28202) 

v4.0  9/16/2014  Page 1 of 13 

Downloaded from

Arrow.com.

Summary of Contents for 28202

Page 1: ...ceed to Step 1 Parts List Item Qty Description 1 1 hinge mount 2 1 dowel pin 3 2 linkage plate 4 4 Gripper link 5 8 4 x 1 spacer 6 2 Gripper plate 7 8 4 40 x 1 25 screw 8 15 4 40 hex nut 9 1 spring 10...

Page 2: ...em Qty Description 6 1 Gripper plate 7 2 4 40 x 1 25 pan head screw 8 2 4 40 Hex Nut Match the angled portions on top of the plastic links to the angles on top of the Gripper as shown in Fig 5 Move li...

Page 3: ...cer 6 1 Gripper plate 7 2 4 40 x 1 25 pan head screw 8 2 4 40 hex nut 14 4 foam tape Repeat Steps 1 through 3 to build the right side Gripper sub assembly in a similar fashion Be sure the angled porti...

Page 4: ...d nuts Fig 9 When all four plastic links are installed tighten securely Double check your work against Fig 10 Note again that the hinge tabs on the bottom linkage plate curl up while hinge tabs on top...

Page 5: ...s up objects Remove the wheels and un mount the servos keeping the screws and nuts Turn the servos over and re position them so their axles are closer to the front of the chassis If using the Activity...

Page 6: ...in the next step Step 10 Position the Gripper assembly onto the hinge mount as shown in Fig 17 below Place the top hinge tabs over the tabs on the hinge mount so the top of the Gripper stays on the hi...

Page 7: ...ers to slightly crimp the center of the hinge plate Replace wheel Fig 18 Fig 19 Copyright Parallax Inc Gripper Kit 28202 v4 0 9 16 2014 Page 7 of 13 Downloaded from Arrow com Downloaded from Arrow com...

Page 8: ...kets Item Qty Description 16 2 servo brackets 17 4 4 40 x 3 8 pan head screw 8 4 4 40 hex nut 11 1 Parallax Standard Servo Attach servo brackets to servo with 4 40 screws and nuts Make sure the metal...

Page 9: ...nd as shown in Fig 24 Fig 24 Copyright Parallax Inc Gripper Kit 28202 v4 0 9 16 2014 Page 9 of 13 Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow co...

Page 10: ...the Gripper and the mounting bracket Position the spring to fit over tabs as shown in Fig 26 below Fig 26 Copyright Parallax Inc Gripper Kit 28202 v4 0 9 16 2014 Page 10 of 13 Downloaded from Arrow co...

Page 11: ...to position the servo shaft on the right as shown in Fig 27 Re install the battery pack and replace the development board support standoffs A with the 1 25 standoffs in this kit When finished carefull...

Page 12: ...asten Actuator Rod Item Qty Description 13 2 Set screws for E Z connector Locate the set screws set aside from Step 7 Insert the ends of the actuator rod about 1 4 inch into the E Z holes in the sides...

Page 13: ...h the listing at left for your robot Turn the switch to Position 2 and download the program The servo shaft will move the Gripper to the closed position Loosen the set screws in the E Z connectors and...

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