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#1
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Re: DART Linear Actuators for the CIM Motor
I think a more appropriate question is how much end play is there in each direction under load. I.E., how much backlash does the geartrain have. Of course, if you always put it in compression is isn't that much of an issue.
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#2
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Re: DART Linear Actuators for the CIM Motor
Lash in the potentiometer gear mesh will also be a factor in repeatability, with the ones mentioned in the preceding posts. Of course, lash/play in the mechanism powered by this actuator will be (at least) equally important.
Can someone involved in making the demonstration arm shown in the linked video please measure and post the unpowered vertical play at the end of the arm? I think tape measure accuracy would be enough to give us all a good idea of what to expect. |
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#3
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Re: DART Linear Actuators for the CIM Motor
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We will set up a test to measure the unpowered vertical play in that or similar assembly in the coming week. |
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#4
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Re: DART Linear Actuators for the CIM Motor
A fully laden 12" Stroke Length, that's including the pot, CIM and limit switches it's 5.8. According to AndyMark the CIM is 2.8lbs so that would put the DART at 3lbs.
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#5
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Re: DART Linear Actuators for the CIM Motor
Dan,
Cool product and it looks great. I do have a question: what is the actual pitch, or lead, of the linear actuator itself? You gave us the gear ratio (that can be changed ... cool) but having the pitch is a crucial piece of information that many users may not realize they need. mm/rev, in/rev, mm/deg, mm/rev or whatever units suit your fancy would be appreciated. Thanks, Paul |
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#6
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Re: DART Linear Actuators for the CIM Motor
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That said, with significant constant load increases there will be decreased bearing life and at some point they may need to be replaced. Since we were focused primarily on the CIM at higher speeds and forces less than 250 lbs I'd like to do some work here to determine what kind of load/life combos we could see. |
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#7
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Re: DART Linear Actuators for the CIM Motor
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There is another thread of similar nature that you may wish to check out here: http://www.chiefdelphi.com/forums/sh...93#post1397193 |
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#8
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Re: DART Linear Actuators for the CIM Motor
Any news on when these will be available on AndyMark?
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#9
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Re: DART Linear Actuators for the CIM Motor
Dan what is the thread pitch on the rod end of the actuator? we have a couple on order but Andy didn't know. Id like to order the rod ends so when the actuators show up i can get them functioning asap
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#10
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Re: DART Linear Actuators for the CIM Motor
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The clevis also has a 5/16" through hole. |
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#11
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Re: DART Linear Actuators for the CIM Motor
Yow!, why so much?... well, let me know if the price comes down... otherwise I think for me personally it will be more benefit to make them from other cheaper parts. I know I can find good deals on lead screws for around 12-15 dollars.
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#12
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Re: DART Linear Actuators for the CIM Motor
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#13
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Re: DART Linear Actuators for the CIM Motor
It appears that you're using a normal 3/8" ball bearing to take all the thrust loads from the lead screw. How does this bearing hold up to large impacts and high loading? I only ask because our team has seen issues with bearings falling apart due to high thrust loads.
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#14
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Re: DART Linear Actuators for the CIM Motor
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#15
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These look cool! How much money do you plan to sell these for?
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