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Cutting a motor commutator & motor tweaks

Got busy

before


After, I think this was 3 cuts, wasnt satisfied yet with this. I think the bit was a little dull and shimmed to high?? Seemed a bit too glossy but idk.


Moved onto an arm that needed more work


Put a new bit in and shimmed it closest to center without going below as I could see and went at this one with 5 passes, half knotch at a time. Seems pretty good to me?


Thoughts on what this looks like, is it right?
 
JohnRobHolmes said:
Looks great
Click to expand...
+1.

Last comm looks the best to me from the pictures.

Don't forget to clean out the comm segment slots when done, I usually drag the back side of an Xacto knife through the comm slot, that will clean out the copper bits & also help prevent comm shorting.8)

PS, I used to run a ballpoint pen down the comm slot to "break" the comm edges, I just do the knife scrape now. Performance seems the same.
 
Just wire this up and am a little suprised at how hard it is to cut serrations using this. I have the 45t rc4wd motor runninh at 5.5v and I have to push quite hard to get any grooving happening. The only way I could get it to work was to set the seration bit hit even so that I could flip the brush upside down and right side up while cutting to get an even seration. I had to puch pretty hard and it took a good 5-7 minutes to cut in deap enough to do anything. Just seems like I should be able to place them in and it would cut like butter looking at the bit but that just not the case. Tryed running it on 3.5v, 12.6v and reversed direction and didn't make alot of difference either way. This was bought new for 7 bucks so no worries if it is crap but it is nip from integy so I don't think the bit is dull. Anyone have experience with this xipp brush master, whats the best way to properly use this tool, no instructions included? Thanks
 
Gees too bad, are ya using a real hard brush?

I have often though of grabbing this little unit off Holmes site.

Holmes Hobbies LLC

FussyBrush-25.jpg
 
Whatever brush cutter I have, can't remember and it's not the same as yours, sucks also. I got a Fussy from Brood and that thing tears em up, in a good way. However I still use the powered one more. I figured out if I don't use the grooves intended to hold the brushes but lay it on the deck and freehand it all it's way faster. Still takes pressure and a flip over but it's a done job in 20 seconds. My bit seems higher up so I'm able to. Or the deck height is thinner. Maybe not though, as I need to flip the brush over to do the full face.

They look fine though different because the serrations aren't from edge to edge.

The Fussy has numerous bits to replicate the diameter of the comm. Bonus.
 
EddieO said:
Use thread cutting fluid from the hardware store....makes them cut easier and faster,while being a better cut too.

Later EddieO
Click to expand...
Crap, that thought crossed my mind when I was looking at my bottle of Greenlee dark threading and cutting oil, says it's good for ferreous and non ferreous materials so that should do. I was scared it would contaminate the brush surface but I can hit them with contact cleaner after?
EeePee said:
Whatever brush cutter I have, can't remember and it's not the same as yours, sucks also. I got a Fussy from Brood and that thing tears em up, in a good way. However I still use the powered one more. I figured out if I don't use the grooves intended to hold the brushes but lay it on the deck and freehand it all it's way faster. Still takes pressure and a flip over but it's a done job in 20 seconds. My bit seems higher up so I'm able to. Or the deck height is thinner. Maybe not though, as I need to flip the brush over to do the full face.

They look fine though different because the serrations aren't from edge to edge.

The Fussy has numerous bits to replicate the diameter of the comm. Bonus.
Click to expand...
Thanks, a fussy brush maybe in my future, I like the idea of cleaning the brush face since I only have a comm stick for that. This cutter is only good for serrations and cutting which is a bit of a letdown. Unfortunately it's gonna run me 55 shipped from holmes so it's a bit rich this close to Christmas. Oh yeah, my bit can be adjusted up, it's set centered and low so I could flip the brush to evenly serrate it.

jaloos said:
Big NOOB question here lol.

serrated brushes why ?
Click to expand...

Not a dumb question at all man.
 
I'd move the bit so it get half the face of the brush. Hit it and flip it and hit it. Move it around a little. Much quicker.
 
Thanks, your cutter looks like it serrates nicer than mine, this bit makes the serrations really coarse compared to yours, bit is way different than mine. I'll try again using cutting oil and your trick EeePee, that will allow me to get into the sides better. I just dont like the way it is leaving the brush face in the pictures, wonder if I could find a better bit to use with it? Also what is the ideal voltage and drive motor or even rpm to run the cutter at?
 
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