Stepper motor dampers don't seem to be working

A place to talk about user-made mods and upgrades to their machines
RocketMagnet
Printmaster!
Posts: 169
Joined: Sun Sep 14, 2014 3:22 pm

Re: Stepper motor dampers don't seem to be working

Post by RocketMagnet » Fri Dec 19, 2014 5:52 am

I've been fiddling to see if I could improve the noise damping.. well after testing by releasing the stepper motors in Repetier and testing each tower independently (homing it) it turns out that ALL of the stepper motors contact the case plates on an Orion with the Astosyn dampers in place (Well on mine they do).

So on an Orion Delta you'll need to space out both the cold end plate & the filament roller plate from the main body of the machine. I used a couple of printed washers on each plate for a temporary solution but the preferred option would be a complete gasket about 2-5mm thick so the motors don't touch these plates.

So basically all the noise if from the Feed stepper now.. offsetting the cold end backplate doesn't help with that so a gasket will have to be made up at some point.

RegB
Printmaster!
Posts: 294
Joined: Fri Jun 27, 2014 7:45 pm

Re: Stepper motor dampers don't seem to be working

Post by RegB » Tue Dec 30, 2014 10:27 am

RocketMagnet wrote:I've been fiddling to see if I could improve the noise damping.. well after testing by releasing the stepper motors in Repetier and testing each tower independently (homing it) it turns out that ALL of the stepper motors contact the case plates on an Orion with the Astosyn dampers in place (Well on mine they do).

So on an Orion Delta you'll need to space out both the cold end plate & the filament roller plate from the main body of the machine. I used a couple of printed washers on each plate for a temporary solution but the preferred option would be a complete gasket about 2-5mm thick so the motors don't touch these plates.

So basically all the noise if from the Feed stepper now.. offsetting the cold end backplate doesn't help with that so a gasket will have to be made up at some point.


Not sure I understand EXACTLY which face contact you mean, but for isolation "washers" I urge you to consider simple rubber grommets.
Thick, cheap, readily available, etc.
A potential problem could be in getting a group of them all squeezed to the same pressure - you can usually count screwdriver turns for this (-:
Be sure to put a metal washer under the screw head - and maybe another one between the grommet and whatever the screw goes through.

User avatar
jdurand
Printmaster!
Posts: 397
Joined: Mon Dec 01, 2014 12:41 am
Location: Silicon Valley, California
Contact:

Re: Stepper motor dampers don't seem to be working

Post by jdurand » Tue Dec 30, 2014 12:07 pm

If you can reach, slide a metal spacer under all 4 sides. Tighten screws until snug against the spacers, then loosen each just enough to pull out the spacer.
Standing on the edge of reality... (me)
Quando omni flunkus moritati (Red Green)
Let no man belong to another that can belong to himself. (Paracelsus)
All things are poison and nothing is without poison; only the dose makes a thing not a poison. (Ibid.)

RocketMagnet
Printmaster!
Posts: 169
Joined: Sun Sep 14, 2014 3:22 pm

Re: Stepper motor dampers don't seem to be working

Post by RocketMagnet » Tue Dec 30, 2014 7:01 pm

Regb... No im talking about on an Orion with the Dampers in place the backs of the stepper motors touch the outer casing.
The spacers im on about are simply spacing out the bolt on side panels so they don't touch the backs of the motors.

RegB
Printmaster!
Posts: 294
Joined: Fri Jun 27, 2014 7:45 pm

Re: Stepper motor dampers don't seem to be working

Post by RegB » Thu Jan 01, 2015 11:54 am

RocketMagnet wrote:Regb... No im talking about on an Orion with the Dampers in place the backs of the stepper motors touch the outer casing.
The spacers im on about are simply spacing out the bolt on side panels so they don't touch the backs of the motors.


Ahh, yeah I guess that would buzz and rattle a bit.

RegB
Printmaster!
Posts: 294
Joined: Fri Jun 27, 2014 7:45 pm

Re: Stepper motor dampers don't seem to be working

Post by RegB » Mon Jan 05, 2015 5:54 pm

RocketMagnet wrote:Regb... No im talking about on an Orion with the Dampers in place the backs of the stepper motors touch the outer casing.
The spacers im on about are simply spacing out the bolt on side panels so they don't touch the backs of the motors.


You have probably fixed this by now, so what I am about to type may be too late.

For others doing this, I found some "half height" NEMA 17s here;
https://www.lulzbot.com/products/half-h ... pper-motor.

This may not work out for you in UK, but a 3 pack of these for ~$40 could save others some hassle.

User avatar
bvandiepenbos
Printmaster!
Posts: 927
Joined: Thu Apr 05, 2012 11:25 pm
Location: Goshen, IN
Contact:

Re: Stepper motor dampers don't seem to be working

Post by bvandiepenbos » Mon Jan 05, 2015 6:22 pm

RegB wrote:
RocketMagnet wrote:Regb... No im talking about on an Orion with the Dampers in place the backs of the stepper motors touch the outer casing.
The spacers im on about are simply spacing out the bolt on side panels so they don't touch the backs of the motors.


You have probably fixed this by now, so what I am about to type may be too late.

For others doing this, I found some "half height" NEMA 17s here;
https://www.lulzbot.com/products/half-h ... pper-motor.

This may not work out for you in UK, but a 3 pack of these for ~$40 could save others some hassle.



Hmmm, I would think those short motors would not have enough torque, looking at the spec sheet here
http://devel.lulzbot.com/TAZ/accessorie ... 033067.pdf
Says they have 26 N cm of torque, If I converted it correctly that is only 37 oz in ... I think the SeeMe motors have 60-70 oz in
So I do not think they will work for the X Y Z motors?
~*Brian V.

RostockMAX v2 (Stock)
MAX METAL "ShortyMAX"
MAX METAL Rostock MAX Printer Frame
NEMESIS Air Delta v1 & v2 -Aluminum delta printers
Rostock MAX "KITT" - Tri-Force Frame
GRABER i3 "Slim"

RegB
Printmaster!
Posts: 294
Joined: Fri Jun 27, 2014 7:45 pm

Re: Stepper motor dampers don't seem to be working

Post by RegB » Mon Jan 05, 2015 6:40 pm

Thanks Brian,
I should have admitted to not having checked specs.
Lulzbot suggest them for extruders, though I don't now through what gearing.

BTW I haven't done the f=ma arithmetic either, but maybe my super light trucks need less f to a them.

RocketMagnet
Printmaster!
Posts: 169
Joined: Sun Sep 14, 2014 3:22 pm

Re: Stepper motor dampers don't seem to be working

Post by RocketMagnet » Thu Jan 08, 2015 12:18 pm

Yeah I'd looked at Astrosyn as they do various sizes and are UK based.
http://astrosyn.com/section.php/61/1/my17hdn_series_1_8

But as far as I can tell the smaller body ones many not have enough Torque.. 39mm body are 230-420 mNm compared to the ~48mm (same as fitted to mine) are 300-580.
No idea if 230-420 is enough for the XYX?

I've essentially discovered why my feed is really noisy in comparison to everything else, the bolt on MDF is cracked right through that the cold end mounts to, so that's where the loud rattily and worsening noise is coming from. It's only being held together by the surface laminate.

I've contacted SeeMeCNC and sent them pics to see if it's possible to get a replacement plate.

Post Reply

Return to “Mods and Upgrades”