@alagi:
I am using this spring. I have actually already received the parts and they are stiffer than I hoped so I had to make some hangers to shorten the needed spring extension. I will have to run tests but I suspect that I can half the stiffness of the spring and transition to Nema14 motors and everything will be fine. The design as is should be able to do 5g plus without overcoming the springs. If I limit that to 2g's the smaller springs would be fine.
Sorry, I haven't been able to draw the string in yet. Here is the arrangement. Everything that Annirak said is accurate. You are right that the string winds and and unwinds.
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You are also right that the need to handle the geometry in firmware is not required but it would be nice. I would like to be able to connect my printer up to anyone elses computer that is setup for a 3D printer and have them be able to use it. At this point, with the reduced geometry, there is no reason not to put it in firmware.
I am using this spring. I have actually already received the parts and they are stiffer than I hoped so I had to make some hangers to shorten the needed spring extension. I will have to run tests but I suspect that I can half the stiffness of the spring and transition to Nema14 motors and everything will be fine. The design as is should be able to do 5g plus without overcoming the springs. If I limit that to 2g's the smaller springs would be fine.
Sorry, I haven't been able to draw the string in yet. Here is the arrangement. Everything that Annirak said is accurate. You are right that the string winds and and unwinds.
You are also right that the need to handle the geometry in firmware is not required but it would be nice. I would like to be able to connect my printer up to anyone elses computer that is setup for a 3D printer and have them be able to use it. At this point, with the reduced geometry, there is no reason not to put it in firmware.