I have got a used SES Arm with YangDong Servos. The problem is, that these servos are not very exact, they have a big tolerance and I guess every move will increase this tolerance. When moving the arm is waggling and in some positions the shoulder is oscillating.
So I want to change the servos in shoulder and elbow but it should not be too expensive.
In the elbow I want to use the HS-645MG. This one is used in the AL5C arm. Is this Servo OK for this job? Is the tolerance small enough? Advantage is that this servo fits into the old bracket.
At the shoulder I want to use only one big Servo because I guess two servos are not very good because they never run to the same position and work against each other.
So I know I have to rebuild the shoulder with other parts but what do I need exactly? And wich servo can I use here? The HS-755 as used in the AL5C or an HS-5745 like in the AL5D. And if I use the digital servo is it so much exacter than the analog one? And can it be fit into the shoulder bracket used with the AL5C?
The standard AL5C arm uses:
1 HS-422
2 HS-475HB
1 HS-645MG
1 HS-755HB
You can always use two servos at the shoulder. The RIOS software can be used to synchronize two HS-475HB servos. My arm isn’t configured like this so I don’t know how hard it is to synchronize them, but based how easy it is to use the RIOS software it may take some fine tuning, but won’t be impossible.
(see page 21 0f RIOS manual)
As far as digital servos go though I’ve never used them so I don’t know how much more accurate they are than analog servos. I do know that they are much more powerful(and expensive) than analog servos.
Thank you, robo, but I’m not using the RIOS Software. I have designed my own servo controller (a very interesting thing mainly the synchronization of the servos all running a different way to the target) and the PC Software I will design by myself also. But, synchronizing the two servos could be possible but I guess using only one big one would be the better way. I guess that’s the reason why Lynxmotion has changed this design.
So if somebody else can tell me some thongs about analog or digital servos in robotic arms would be great.
With the part list I mean the mechanical parts as brackets, adapters and so on.
Jap, this guide I know. Wht I need is a Part List for the bracket I need to change the small ones to the big one becuase some of the parts are in a package and other I have to order as a single part.
And the other question is: is it much better to use a digital servo and how much exacter does it work?
