nema17 dampers

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ErikAkia
Posts: 41
Joined: Wed Apr 09, 2014 8:36 pm

Re: nema17 dampers

Post by ErikAkia » Sun Feb 28, 2016 9:56 pm

Jules wrote:They've got one heck of a mark-up on those things. (I sure didn't pay $45 for the ones i picked up on EBay.)
Holy cow, I bought mine for 2.40 each. They came direct from China but I bet those others did as well.

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Jules
Posts: 3150
Joined: Wed Jan 21, 2015 1:36 am

Re: nema17 dampers

Post by Jules » Sun Feb 28, 2016 10:07 pm

Think I remember mine being $16 for four. (You only need two - sent the other 2 to insta for his stable of ponies.)

Mine didn't come with screws though - i think i just used the ones from the machine.

ErikAkia
Posts: 41
Joined: Wed Apr 09, 2014 8:36 pm

Re: nema17 dampers

Post by ErikAkia » Sun Feb 28, 2016 10:31 pm

I got mine through http://www.robotdigg.com/product/341/An ... 17+stepper
I was a bit leery of the low price but the quality was good. I had to but a bunch of other stuff to make shipping worth while.
I remember thinking that I should get a big order and try and sell the extra to help lower the cost of shipping.
I am pretty sure they did not come with screws but I have so many that came with my printer (they used to send extra in the beginning) that I had enough.

msmollin
Posts: 55
Joined: Fri Dec 19, 2014 3:07 pm

Re: nema17 dampers

Post by msmollin » Mon Feb 29, 2016 12:37 am

In for 3 (figure 2 + 1 spare incase anything happens) from Robotdigg. Little weird they go thru a quoting process, but sounds like they're legit. Will post back once I have them installed!

dramsey
Posts: 124
Joined: Tue Feb 16, 2016 6:07 pm

Re: nema17 dampers

Post by dramsey » Mon Mar 07, 2016 12:22 am

I've installed, as recommended here, a Noctua 60mm fan in the power supply, and man, did that make a difference!

I've two of the NEMA 17 dampers, but before I install them, I'd like to know how to adjust the belt tension. It seems fairly tight and I'm not sure I could reproduce it by "hauling on the stepper", which seems to be the only way I could adjust it...

Or do I simply mark the motor position, reinstall the motor with the dampers, then use a screwdriver or something to slip the belt around the pulley?

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Jules
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Re: nema17 dampers

Post by Jules » Mon Mar 07, 2016 1:58 am

dramsey wrote:........ "hauling on the stepper", which seems to be the only way I could adjust it...
That's how I did it. :)

jsc
Posts: 1863
Joined: Thu Apr 10, 2014 4:00 am

Re: nema17 dampers

Post by jsc » Mon Mar 07, 2016 4:01 am

It doesn't have to be ludicrously tight, and in fact pulling it too tight can cause the rail to bow making it seem like you have a dome in your bed. Just haul on the stepper to a reasonable tension.

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insta
Posts: 2015
Joined: Tue Sep 16, 2014 3:59 am

Re: nema17 dampers

Post by insta » Mon Mar 07, 2016 4:36 am

I wedge my finger between the stepper and the frame. The squishyness of my finger combined with the pain I'm not willing to endure means the tension is just about perfect ;)
Custom 3D printing for you or your business -- quote [at] pingring.org

scampa123
Posts: 195
Joined: Mon May 18, 2015 4:00 pm

Re: nema17 dampers

Post by scampa123 » Sat Mar 12, 2016 5:00 pm

I just installed my dampers and they are great!!

So, like most others my fans are too loud!! ;-)

I tried to find 24v fans which are also quiet...but no luck yet!

Also, is everyone's Z noisy? Mine is! I tried greasing it and oiling the rods but it is still pretty noisy...Any fix for it??

dramsey
Posts: 124
Joined: Tue Feb 16, 2016 6:07 pm

Re: nema17 dampers

Post by dramsey » Sun Mar 13, 2016 6:04 pm

As you've discovered, 24v fans are hard to find. The solution is to use 12v fans, but to step the 24v down to 12v with one of these dirt-cheap "buck converters":

http://www.ebay.com/sch/i.html?_from=R4 ... r&_sacat=0

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