Turtlebot3 friends's BOM is wrong

[DaisukeUra]

Hi,

I want to build Turtlebot3 Mecanum(https://emanual.robotis.com/docs/en/platform/turtlebot3/locomotion/#turtlebot3-friends-mecanum). So, I checked BOM and bought mecanum wheels rb-nex-13 and printed joint parts. (BOM: https://docs.google.com/spreadsheets/d/1vbIFMRJMbyOd2D6BtwV1Ow_yBc9xRHktqZhTTmwI_l4/edit#gid=953634249)

But they can't connect because of hole placement is wrong. I think the link address of wheels in BOM is wrong.

Thanks.

[ROBOTIS-David]

@DaisukeUra

Thank you for reporting the issue.

Sorry about the inconvenience that may have caused and we are checking the BOM now,

If you do not mind, could you specify the name of item from the item list below?

Single Item	Quantity	Purchase Links
PHS M3x8mm	32	https://us.misumi-ec.com/vona2/detail/110302280810/?HissuCode=NKJ3-8&PNSearch=NKJ3-8&KWSearch=NKJ3-8&searchFlow=results2type
WB_M2.5x8mm	12	https://us.misumi-ec.com/vona2/detail/221000551286/?HissuCode=CSH-ST-M2.5-8&PNSearch=CSH-ST-M2.5-8&KWSearch=CSH-ST-M2.5-8&searchFlow=results2type
WB_M2.5x12mm	16	https://us.misumi-ec.com/vona2/detail/221000551286/?HissuCode=CSH-ST-M2.5-12&PNSearch=CSH-ST-M2.5-12&KWSearch=CSH-ST-M2.5-12&searchFlow=results2type
WB_M3x40mm	12	https://us.misumi-ec.com/vona2/detail/221000551286/?HissuCode=CSH-ST-M3-40&PNSearch=CSH-ST-M3-40&KWSearch=CSH-ST-M3-40&searchFlow=results2type
NUT_M3	16	https://us.misumi-ec.com/vona2/detail/110300250540/?HissuCode=SLBNR3&PNSearch=SLBNR3&KWSearch=SLBNR3&searchFlow=results2type
SB-S3-45	20	https://us.misumi-ec.com/vona2/detail/110500137950/?HissuCode=SB-O3-45&searchFlow=results2similartn
Mecanum wheel	4	https://www.amazon.com/100Mm-Aluminum-Mecanum-Wheel-Right/dp/B01CTUT4GY/ref=sr_1_fkmrnull_1?keywords=100mm+Mecanum+Wheel&qid=1549936037&s=gateway&sr=8-1-fkmrnull
3D printing parts(Wheel joint)	4	https://cad.onshape.com/documents/1131a9f555bd1842665c39d0/w/1ed900186382ba9b6a9c800b/e/a62bcab3415cef911d0ba0bf

Thank you.

[DaisukeUra]

@ROBOTIS-David Thank you for your response.

I think Mecanum wheel's link in that list is wrong. The link shows that the mecanum wheels the diameter is 100mm. However, the 3D printing parts(Wheel joint) link shows that the wheels are 60mm mecanum wheels. (Unfortunately, I don't know the model number of the wheel used in this CAD model.)

Thank you.

---

P.S. I designed a new wheel joint for 100mm wheels, and mecanum turtle now moves. Anyway, the Turtlebot 3, especially the modular plates and Dynamixel Servo Motor, are great! thank you.

[ROBOTIS-David]

@DaisukeUra I see,

Thank you for your giving attention to the TurtleBot friends.

I believe this information helps for every ROBOTIS users.

Have a great day :)

@ashekim

Ashe, Could you please see the 3D printing parts(Wheel joint) and check out the diameter of the part. One of ROBOTIS user has reported that wheels of the parts has wrong measured size 60 mm which does not fit in the Mecanum wheel, 100 mm. See the B.O.M sheet. . Thank you,

[ROBOTIS-Ashe]

@ROBOTIS-David

David, I think we can modify the BOM with the link below.

https://www.amazon.com/Mecanum-UniHobby-Compatible-Raspberry-Arduino/dp/B07CK84N69/ref=sr_1_18?dchild=1&keywords=60mm+Mecanum+Wheel&qid=1594607324&sr=8-18

Thank you.

[ROBOTIS-David]

@DaisukeUra

Hi, the issue is resolved,

I would like to close this issue if you have no additional inquiry !

Thank you :)