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Thread: Linear actuator
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23rd November 2014, 08:25 PM #1.
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Linear actuator
I've been playing around with the 5 linear actuators I picked up for nicks from a recent treasure hunt.
4 of them are 24V DC and one is a 220V AC
All the motors are working but one 24V actuator has an shredded motor to internal gear coupling so it's not going anywhere.
It looks like it would be possible to fix it with a bit of fiddling.
2 of the other 24V units are working fine in both directions but the 4th one is stuck in the "in" position and as its a sealed unit its going to be hard to fix.
The 220V unit was interesting - just a 3 pin plug/cord (no obvious switch) so after checking it wasn't short circuiting to ground I plugged it in and nothing happened.
Checking it over I noticed a small rubber nipple with small two holes in it. On opening up the connection box I found the nipple was connected via two lengths of silicone tubing to a pair of microswitches which were clearly the fwd and rev switches. To test the unit out I pushed two plastic pipettes into the holes in the rubber nipple and found that the unit would switching by applying a slight pressure to either pipette. This unit has 200 mm travel at 6.3 mm/s and a max lift capacity of 60kg.
Now what can I use them for?
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23rd November 2014 08:25 PM # ADSGoogle Adsense Advertisement
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23rd November 2014, 08:52 PM #2Philomath in training
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How about opening or closing vents on your shed ventilation/ dust control system?
Michael
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23rd November 2014, 09:02 PM #3
Seen em used to lift up the roof in place of cables in windup campers (caravans).
Of course having 4 working units helpswww.lockwoodcanvas.com.au
I will never be the person who has everything, not when someone keeps inventing so much cool new stuff to buy.
From an early age my father taught me to wear welding gloves . "Its not to protect your hands son, its to put out the fire when u set yourself alight".
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23rd November 2014, 09:33 PM #4.
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24th November 2014, 08:22 AM #5
A super accurate fine adjustment mech on a fence ? (Table saw, router table etc.)
Glenn Visca
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24th November 2014, 10:09 AM #6.
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That's what I first thought off, but they quite slow and are not easily able to be as finely adjusted because when thy are turned off they continue to move for a fraction of a second so you have to sort guess where they will stop. The 24V DC units can be controlled by varying the V so they could be more rapidly moved approximately into place using a high V and then the V reduced so the arm travels much slower thereby controlling the final stopping position. It would be interesting to hook a set of digital position measurement arms up to them to see what sort of control, backlash and reproducibility could be obtained.
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24th November 2014, 10:35 AM #7
Hi Bob,
I've got a few linear actuators, and one job I was planning to use them for is a small workshop lifting system. up to 100 Kg or so, a bit like a die trolley.. Sorry, no plans or details, just general ideas..
Ray
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24th November 2014, 03:25 PM #8GOLD MEMBER
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Hi there
I've got about 5 similar units. They are all 220v and came out of treadmills. They are used to raise/lower the deck to walk/run on incline. Still wondering what to use them for myself. They overheat if used continuously and have a duty cycle of about 1/10.
Cheers
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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24th November 2014, 03:51 PM #9.
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24th November 2014, 08:46 PM #10SENIOR MEMBER
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29th November 2014, 01:59 AM #11GOLD MEMBER
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You could use them to make an adjustable height bench, using a scissor type action.
Kryn
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29th November 2014, 07:45 AM #12GOLD MEMBER
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Hi phil. That sounds like a novel idea. With all the other projects on my "to do" list, I cant ever see it happening!
One thinfs for sure, the minute I throw them away I'll find a need for them!
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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