Anyone have any thoughts on rotary vs linear deltas? Wondering if the linear would be easier to get precise repeatable movements between multiple machines over the rotary since there is less 3d printed parts in the critical accuracy path?
Just looking at my FPD and was thinking I have 80 to 90% of a linear delta sitting here. Just need Thomson rods, bearings, longer belts, and some mounts and adapters. All the motors, electronics, and sensors / cameras could be reused in the new machine. Was also thinking since large Z depth is easy on linear machines could also have multiple levels of feeders that the head pokes into to pick up parts.
Thoughts?
Peter
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--Rich
The thing that lets you do multiple layers of feeders is the fact that the arms fold over the feeder head when you go to one of the extremes. So if you move to almost one of the extremes you should be able to put another layer of feeders just above the highest point of the head + arms (give yourself ~1" so you can pick the part of the pocket then move the head out with out bumping into anything.
This would work on the FPD as well in theory but the work envelope is so small there is just not enough space for multiple ranks. The other method would be to stack the feeders like organ keys. That way the first row is level with the base and close. The next rank is slight up and back as not to overlap the pickup point of the first and so on. Downside to this is a very custom multilevel feeder.
Once the holidays are done should be able to work on stuff more. Due to other work have not been able to follow things much. How is calibration going? Douglass any progress on the I2C temp code?
Later,
Peter
The thing that lets you do multiple layers of feeders is the fact that the arms fold over the feeder head when you go to one of the extremes. So if you move to almost one of the extremes you should be able to put another layer of feeders just above the highest point of the head + arms (give yourself ~1" so you can pick the part of the pocket then move the head out with out bumping into anything.
This would work on the FPD as well in theory but the work envelope is so small there is just not enough space for multiple ranks. The other method would be to stack the feeders like organ keys. That way the first row is level with the base and close. The next rank is slight up and back as not to overlap the pickup point of the first and so on. Downside to this is a very custom multilevel feeder.
Once the holidays are done should be able to work on stuff more. Due to other work have not been able to follow things much. How is calibration going? Douglass any progress on the I2C temp code?
Later,
Peter
From: fire...@googlegroups.com <fire...@googlegroups.com> on behalf of Rich Obermeyer <rich.ob...@gmail.com>
Sent: Sunday, December 13, 2015 2:00 AM
To: fire...@googlegroups.com
Subject: Re: [FirePick] Re: rotary vs linear deltas
How about putting a square frame the same size as the FPD into a typical linear printer (see below) and you should be able to attach most of the items that could attach to the FPD. A few blind spots but it should work.I am just waiting for a good feeder that can be connected to it to finish it off.Then openpnp is suppose to do the rest.I need to try firenodejs to see how precise it can be.
I would be interested how multiple levels of feeders could work. My printer has 16 inches of height!
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