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snwcmpr
10/18/2019 2:37 PM
Eth Nat Yirg Idido roasted yesterday. I dropped some off at a friends coffee shop. In a few days he will brew it and tell me what he thinks. We believe my roasts are better than what we buy.

snwcmpr
10/16/2019 2:52 PM
Thank you for all you guys do.

JackH
10/15/2019 2:02 AM
They seem to be after the shoutbox. They have been removed. I don't see anything in the forums.

snwcmpr
10/14/2019 3:27 PM
We have been hacked. A whole lot of posts that have filled up the whole forum.

snwcmpr
10/10/2019 4:49 AM
Honduras Royal Reserve today.

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Vac Motor Armature Fix (?)
CharcoalRoaster
I thought I scored a deal on an Ametek 115334 motor off ebay ($60) because the seller said it had a bent armature. So, a couple of questions -

(1) Can a bent armature be fixed? I haven't fired up the blower as to avoid further damage

(2) I'm trying to access the armature but have no idea what this type of bolt head is? Anyone know?

https://www.dropb...0.JPG?dl=0
 
JitterzZ
CharcoalRoaster wrote:

I thought I scored a deal on an Ametek 115334 motor off ebay ($60) because the seller said it had a bent armature. So, a couple of questions -

(1) Can a bent armature be fixed? I haven't fired up the blower as to avoid further damage

(2) I'm trying to access the armature but have no idea what this type of bolt head is? Anyone know?

https://www.dropb...0.JPG?dl=0

Looks like T-groove https://www.grain...ters=attrs
https://www.lossp...ne-screws/
Lamb Motor Armature 115334 https://www.amazo...B00NO3OXWG
This might be helpful https://builtinva...brush.html
Edited by JitterzZ on 03/15/2019 11:07 AM
 
renatoa
Spanner slot, but three slots instead the usual two slots version.
 
BenKeith
Yes, it can be fixed but only by the right person. It has to be put in a lathe to straighten. They set it up with dial indicators on the right spots, spin it to see where it's out and then bend it back into alignment. Most any electric motor shop can do it but the cost is probably not going to be pleasant. If you know someone with a lathe and knows how, you might can get them to straighten it.
Other than that, you would probably have to buy a new one.

The bolt you are showing is a tamper resistant and requires a special socket to turn it.
If you have access to get a thin cutoff wheel in there, you can use a very thin disk like on a Dremel and cut a common screwdriver slot in it. Just don't cut too deep, it will weaken it to the point the head will split and break half of it will break off.
Edited by BenKeith on 03/15/2019 1:33 PM
 
CharcoalRoaster
Thanks everyone for the replies -- I think I'll wire up a plug and see what happens when running. Maybe I'll luck out and it's just the brushes that need to be replaced.
 
CharcoalRoaster
I pulled off the housing for a better look and I think the armature is indeed bent. Attached is a video of the noise coming from the blower

https://www.dropb...3.MOV?dl=0
 
JitterzZ
CharcoalRoaster wrote:

I pulled off the housing for a better look and I think the armature is indeed bent. Attached is a video of the noise coming from the blower

https://www.dropb...3.MOV?dl=0

Sounds like you're grinding metal. If it is bent, then running it is making things even worse. Repair or replace?
 
CharcoalRoaster
Yeah, I found an armature for about $60 to replace that -- how difficult a fix is it to swap one out? Should I just get a completely different blower?
 
JitterzZ
CharcoalRoaster wrote:

Yeah, I found an armature for about $60 to replace that -- how difficult a fix is it to swap one out? Should I just get a completely different blower?

Haven't done it myself, but here's a video that might give you some insight: https://youtu.be/...
Here's a brand new one for $131 https://www.centr...tek-motor/, just in case you decide that cutting your losses is the best option.
Edited by JitterzZ on 03/18/2019 2:42 AM
 
CharcoalRoaster
Additionally, as I look into repair or replacement is waterlift or CFM a more helpful spec to consider for fluidbed bean circulation?
 
JitterzZ
CharcoalRoaster wrote:

Additionally, as I look into repair or replacement is waterlift or CFM a more helpful spec to consider for fluidbed bean circulation?

https://forum.hom...post_66412
 
Alan
Sounds more like a worn out bearing noise to me
 
CharcoalRoaster
I checked the bearings as they are all in good shape. However, when I removed the outer coil ring (?) and spun the armature with my fingers it was easy to tell that it spun unevenly ever so slightly which caused it to rub against the coil
 
allenb
Toss it in the scrap metal bin and find a used vacuum cleaner for $20 bucks, strip out the blower. I've found commercial sized vacuum blowers in scrapped vacuums at vacuum cleaner shops going for near nothing. They often keep a lot of junk in their shops they need to get rid of.
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
CharcoalRoaster
Yeah, I've actually got a new blower arriving tomorrow. Found a comparable model on ebay for super cheap. Thanks everyone!
 
JackH
It is fun to take things apart.
---Jack

KKTO Roaster.
 
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