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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Pneumatic rotary actuator update
I tracked down pneumatic rotary actuators that have the rack gear built in and
other niceties like cushions and stops. Thanks for the pointers! I talked to a couple of manufacturers and they balked at 300 ms stroke time. The idea of a cylinder attached to a crank arm and one-way clutches seems to be the front runner, it's simple, accurate, reliable and cheap. This will be the fourth generation for this mechanism. Each newer one is simpler and better than the previous. I wonder what the fifth will look like? |
#2
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Pneumatic rotary actuator update
"Tom Gardner" wrote in message ... I tracked down pneumatic rotary actuators that have the rack gear built in and other niceties like cushions and stops. Thanks for the pointers! I talked to a couple of manufacturers and they balked at 300 ms stroke time. The idea of a cylinder attached to a crank arm and one-way clutches seems to be the front runner, it's simple, accurate, reliable and cheap. This will be the fourth generation for this mechanism. Each newer one is simpler and better than the previous. I wonder what the fifth will look like? http://metalworking.com/Dropbox/_200...0-wirefeed.JPG Here's a pic of the first generation. Notice the air cylinder, the one set of spring loaded pinch rollers moves back and forth and one set is stationary. There are one-ways in the rollers. It works but if the wire it's feeding is too oily or too dry or has lead-drag or soft spots or hard spots or crooks or twists or if it's Tuesday or... |
#3
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Pneumatic rotary actuator update
"Tom Gardner" wrote:
http://metalworking.com/Dropbox/_200...0-wirefeed.JPG Here's a pic of the first generation. Notice the air cylinder, the one set of spring loaded pinch rollers moves back and forth and one set is stationary. There are one-ways in the rollers. It works but if the wire it's feeding is too oily or too dry or has lead-drag or soft spots or hard spots or crooks or twists or if it's Tuesday or... Who is the artist? Wes |
#4
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Pneumatic rotary actuator update
Tom, Does this unit go back and forth continuously at a set speed? If
so,take a look at fabric loom operation, about 900 cycles/min. I could sort of describe the mechanism to you. better yet, get the book of ingenious mechanism. Karl |
#5
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Pneumatic rotary actuator update
Tom Gardner wrote:
http://metalworking.com/Dropbox/_200...0-wirefeed.JPG One could replace the pinch rollers with a gripper, yes? http://www.emiplastics.com/eoat_spruegrip.htm Oooh baby, Pheuma-Nippers! http://www.emiplastics.com/eoat_nipper.htm Gripper - Nippers!! http://www.emiplastics.com/pdfs_eoat...p0710_0711.pdf --Winston |
#6
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Pneumatic rotary actuator update
"Wes" wrote in message ... "Tom Gardner" wrote: http://metalworking.com/Dropbox/_200...0-wirefeed.JPG Here's a pic of the first generation. Notice the air cylinder, the one set of spring loaded pinch rollers moves back and forth and one set is stationary. There are one-ways in the rollers. It works but if the wire it's feeding is too oily or too dry or has lead-drag or soft spots or hard spots or crooks or twists or if it's Tuesday or... Who is the artist? Wes One of the lady's grandson. |
#7
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Pneumatic rotary actuator update
"Winston" wrote in message news:fhv9k.90$HY.60@trnddc01... Tom Gardner wrote: http://metalworking.com/Dropbox/_200...0-wirefeed.JPG One could replace the pinch rollers with a gripper, yes? http://www.emiplastics.com/eoat_spruegrip.htm Oooh baby, Pheuma-Nippers! http://www.emiplastics.com/eoat_nipper.htm Gripper - Nippers!! http://www.emiplastics.com/pdfs_eoat...p0710_0711.pdf --Winston Looking at those make my nipples hurt! |
#8
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Pneumatic rotary actuator update
Tom Gardner wrote:
Looking at those make my nipples hurt! Must. Lose. Mental. Image! --Winston |
#9
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Pneumatic rotary actuator update
On Sat, 28 Jun 2008 03:54:43 -0400, "Tom Gardner"
wrote: snip Each newer one is simpler and better than the previous. I wonder what the fifth will look like? ====== How about a linear motor? http://www.baldor.com/products/linear_motors.asp http://www.tecnotion.com/?gclid=COGz...FRIuagodzDkJtA http://www.linmot.com/lm_typo/index.php Unka' George [George McDuffee] ------------------------------------------- He that will not apply new remedies, must expect new evils: for Time is the greatest innovator: and if Time, of course, alter things to the worse, and wisdom and counsel shall not alter them to the better, what shall be the end? Francis Bacon (1561-1626), English philosopher, essayist, statesman. Essays, "Of Innovations" (1597-1625). |
#10
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Pneumatic rotary actuator update
Wow! 5 million cycles for under $200 I like RELIABLE and CHEAP products!
Winston wrote: Tom Gardner wrote: http://metalworking.com/Dropbox/_200...0-wirefeed.JPG One could replace the pinch rollers with a gripper, yes? http://www.emiplastics.com/eoat_spruegrip.htm Oooh baby, Pheuma-Nippers! http://www.emiplastics.com/eoat_nipper.htm Gripper - Nippers!! http://www.emiplastics.com/pdfs_eoat...p0710_0711.pdf --Winston |
#11
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Pneumatic rotary actuator update
RoyJ wrote:
Wow! 5 million cycles for under $200 I like RELIABLE and CHEAP products! I dunno, it costs a whopping $18 to $57 for them to refurbish the nipper blades... http://www.emiplastics.com/pdfs_eoat...p0806_0807.pdf Yes. I am trying to be funny. Check out those size 50's OMG http://www.emiplastics.com/pdfs_eoat...p0728_0776.pdf --Winston |
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