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Discussion Starter · #1 ·
Hey guys, im building a belt sander for racing and im using 2 Porter-Cable 690lr 1 3/4 hp routers to power it. in my build, i need to make one of my 2 routers rotate clock wise as opposed to the factory counter clockwise. the router has 3 wires going into it, a Green that grounds straight to the case, and a White and Black that goes into the coils.

i wanted to just switch the spring leads on the contacts and see if that worked, but the set screws have lock tight and i cant get them off. i tried switching the White and Black wires, and it still rotates in the same direction... Can any one help me figure out how to make this thing spin the other way??

I have a race this Saturday and really want to have it ready to run!!
 

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Welcome N/a. Please update your Account Settings (upper right below your login) so we will know more about you,

To reverse the rotation of the router, you will need to change the wiring inside the router in order to do this. Nothing at the power cord point will work for doing this. Probably swapping the wiring to the brushes will be the easiest to get to. The polarity of the armature with respect to the field coil needs to be opposite from what it is. Swap either the armaturs (brushes) or the field wiring and it should reverse.

Don't leave it this way after you finish with your belt sander project or you may ruin some prospective woodworker's day.

Charley
 

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Discussion Starter · #8 ·
Welcome N/a. Please update your Account Settings (upper right below your login) so we will know more about you,

To reverse the rotation of the router, you will need to change the wiring inside the router in order to do this. Nothing at the power cord point will work for doing this. Probably swapping the wiring to the brushes will be the easiest to get to. The polarity of the armature with respect to the field coil needs to be opposite from what it is. Swap either the armaturs (brushes) or the field wiring and it should reverse.

Don't leave it this way after you finish with your belt sander project or you may ruin some prospective woodworker's day.

Charley
Thinks I wanted to do that first but the set screws that hold the brass case for the brush has lock tight on them and a cant brake them loose. I can try and cut the wires and swap them that way, but there's not much length to the wires. And these routers will never be used for anything else besides powering my racer. Ill post some photos tonight
 

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Thinks I wanted to do that first but the set screws that hold the brass case for the brush has lock tight on them and a cant brake them loose. I can try and cut the wires and swap them that way, but there's not much length to the wires. And these routers will never be used for anything else besides powering my racer. Ill post some photos tonight
You could change direction if you geardrive off the router shaft.
Herb
 

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Discussion Starter · #14 ·
10K plus RPM ...yup, that'll go fast! :)
What grit belt do you use?

*It just occurred to me: if you used a couple of Bosch 1617's that'd be over 16 lbs for the routers alone!
Well actually 27,500rpm per router and I'm using 2 at a combined 3.5hp, I'm hoping it'll be fast, and I'm using 24 grit and 2 belts!
 

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WoW!!.... make sure you post the video!! Talk about needing a long cord.......

Well, just checked Youtube.... amazing!! I've never heard of this before, looks like fun.
 

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Using routers in a belt sander race sounds like the current uproar over Olympic transgender competition... ;)
Nope, just like drag racing, there are different classifications! And they have an association, the BSRA (belt sander racing association).

So we can assume that the OP wants to enter the 'modified' classification.

All the above said, I still think it's crazy, but I have an old cheapy belt sander....... let me think.... :wink:

 
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