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Ahmed

Tamiya tt02 steering issue

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Hello guys its me again :p

 

so i was suffering while building my tt02 , its finally done , but for some reason steering is not working properly,  please check  the 3 videos below. 

 

one video show that my servo is working correctly ( as far as I know ) 

 

second video show how my steering is jammed and slow when I move it with my hand 

 

last video show how it does not move when connected to my servo 

 

what have I done wrong ?

 

thanks 

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Appears to be binding on the steering arms. 

Have you used step screws?

Put the washers between the arms and chassis?

Any grease?

Try slackening them slightly. 

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Did you use the 3x18mm or by mistake the 3x10mm step screws? 

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14 minutes ago, svenb said:

Appears to be binding on the steering arms. 

Have you used step screws?

Put the washers between the arms and chassis?

Any grease?

Try slackening them slightly. 

i am using Step Screws , i put a very very very small grease because it just finished :(
i think u mean with washer , the metal circle ? yes i put this between chassis and arm . 
do  i have to tight the screw or make it a bit lose?

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Just now, svenb said:

Did you use the 3x18mm or by mistake the 3x10mm step screws? 

i am using the longer one 3x18 

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maybe some screw or screws is overtightened?

i would disconnect the tierods and feel how the parts moves at the different areas. also check if the front uprights can move freely.

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To me it appears that the binding is occurring at the ball joints on the track rods. This can easily happen if the screws holding them in place are done up tightly, as this compresses the plastic balls vertically, causing them to bulge outwards and bind in the track rods.

You can try slacking the screws off a little and hope that the balls return to their proper shape, or you can take this opportunity to fit the adjustable track rod set which uses metal balls. 

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Agreed!! Obvious binding and stuck joints. The Servo seems to work fine disconnected....

 

This is why it's suffering.

 

First try loosening everything, too loose, and see what happens.

 

Also, your Servo seems pretty weak. I would look into a more powerful one. There are now quite inexpensive 13-20kg Servos available, that could overcome any binding - if there's any left...

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