I’ve just finished my Lynx 6. When in the configuration window the servo I’m not using goes limp when I go to another. Ex. I can place the shoulder to vertical but then when I go to the elbow the shoulder falls either forward or backwards. Am I doing something wrong. I have a USB to Serial adapter. But all the individual commands work in the config panel so I’m assuming my signals are good.
The problem you are describing is caused by the SSC-32 resetting after moving a servo. This can be caused if you are using the servo power supply to power the logic and the servos, and the power supply isn’t able to deliver enough current. We are currently providing a 6vdc 2 amp supply, but for a while we were using a 5vdc 2amp supply due to the unavailability of the 6vdc one. The fix is easy, just pull the VS=VL jumper, and connect the 9v battery clip to the VL input. This will prevent the SSC-32 from resetting.
Thanks. It’s working great now.
I need to build a set of working arms able to lift around 2.5lbs. I thought I’d use three servos for each arm and wrist movement, and two smaller servos each to operate my custom claws. The claws and wrists are the greatest weight in this design. Are standard heavy duty type servos strong enough? Will they fit Lynxmotions brackets? I’ve always used DC motors in my robots up to this point. These will all be controlled via microcontroller.
Thanks,
Darrell
Well, the 5995TG servos are 417oz-in a pop.
Three would be more than 1200 oz-in or about 5.5 ft-lbs.
I believe that means that for every foot that the joint is long that you’d be able to lift 5.5 lbs.
So, I believe that two 5995’s would be sufficient for your job, provided that you kept the distances between the joints less than a foot (I think they’re about a half foot in the lynxmotion arms).
417 oz-in means that at one inch a force of 417oz can be applied. If you double the length, you halve the force that can be applied. If you halve the length you double the force.
At eight inches inches the servo cited can apply a force of 1/8 417oz, or 3.25 lbs. If you keep the rest of the arm under .75lbs and keep the maximum extension of the arm less than eight inches there shouldn’t be any problem.