Rupes LHR 21ES Random Orbital Polisher - Features & Benefits

sulla said:
KB, thanks for your thought on this... I'm actually one of those who would never stop my rotary between sections. I would turn it down to speed 1, buff residue, apply polish to paint, and then buff again.
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Yeah, not ideal to do the same thing with a random orbital.



With a rotary, it's convenient & easy to apply additional buffing liquid to the paint and then "pull" it into the pad. With a random orbital, quite a bit harder and uncomfortable to tilt the machine and pull the product in. Unless you're being really careful, there's a high likelihood that buffing liquid will splatter all over the place.



sulla said:
I tried to remove the bp and then let the rupes spin at speed 6 and it's indeed rotating violently the vibration is so unbearable, with the bp polishing in the air no problem with vibration or such.
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I'm not sure why you would remove the plate and then run the machine, just to see how out of balance the machine becomes.



That's akin to pulling a tire off its wheel, and then being surprised that the balancing weights attached to the wheel have caused the wheel itself to become unbalanced.



sulla said:
So yes, I can see how the bp tucked against the housing is a way to give some control to the machine.
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The claim is... that it was done IN CASE someone started the machine prior to placing on the polishing surface.



It wasn't done SO THAT someone would be able to do it.





sulla said:
I'm still at lost deciphering what you are trying to say here.
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Sorry for that, I must have missed the mark this time. I am saying that I prefer that the backing plate be allowed to spin freely. I want as much rotation as I can get out of the machine, and prefer to control the amount via speed setting.



l would much rather have to SLOW the machine down to MINIMIZE backing plate rotation versus having to SPEED the machine up in order to INCREASE it.



sulla said:
Can you opine on whether it safe to continue using the rupes with the washer mod the way I use my rotary ? Thanks.
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Washer or no washer... * DO NOT * run the machine unloaded.
 
[QUOTE=Kevin Brown;1533009

l would much rather have to SLOW the machine down to MINIMIZE backing plate rotation versus having to SPEED the machine up in order to INCREASE it.





I'm lost, isn't that what a speed switch is suppose to do?
 
Legacy99 said:
Kevin Brown;1533009 l would much rather have to SLOW the machine down to MINIMIZE backing plate rotation versus having to SPEED the machine up in order to INCREASE it. I'm lost said:
Well, yea, but I think it has more to do with rotation then speed :fish:
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If this has been covered I apologize. What are the speed settings on the Rupes? What speeds do most use to cut and polish? I have a PC7424 and normally use speeds 4 and 5 unless I'm applying a wax/sealant. I haven't received my Rupes yet and I assume its in the instruction manual. Thanks.
 
Legacy99 said:
I'm lost, isn't that what a speed switch is suppose to do?
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I thought it was understood that the speed dial controls oscillation speed.

Hmm, let's see... You've got 4-1/2 times the amount of posts that I do, so you must already know this. :nixweiss
 
Kevin Brown said:
I thought it was understood that the speed dial controls oscillation speed.

Hmm, let's see... You've got 4-1/2 times the amount of posts that I do, so you must already know this. :nixweiss
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If I asked a stupid question, I'm sorry.
 
Kevin Brown said:
Yeah, not ideal to do the same thing with a random orbital.



I'm not sure why you would remove the plate and then run the machine, just to see how out of balance the machine becomes.



That's akin to pulling a tire off its wheel, and then being surprised that the balancing weights attached to the wheel have caused the wheel itself to become unbalanced.
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I guest I just lacked common sense, just wanted to verify what marco and you said about the bigfoot's power. The rupes being not loud,combined with the 500 watt power made me think it can be that powerful...running it at speed 6 without the bp and oh yeah...i forgot that it's 4200 rpm...



I am saying that I prefer that the backing plate be allowed to spin freely. I want as much rotation as I can get out of the machine, and prefer to control the amount via speed setting.

Washer or no washer... * DO NOT * run the machine unloaded.
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With the washer I no longer bog down at speed 1, interestingly speed 2 and 3 actually I notice a little bit of slowing down in bp rotation (Seems to be its electrical mechanism controlling excessive rotation).. Speed 4 and up no more bogging down...



I guess what I'm trying to ask is.. what's the worst that could happen running the machine unloaded ? Sorry for lack of common sense, it's just that looking at how beastly my bosch rotary spins and how benign the rupes is even with the washer mod.. I can't yet to see danger looming ?
 
Sulla, run your Bosch rotary with a pad that is set 21 millimeters off center and run it. You'll see some of the forces that the Bigfoot is creating and harnessing. The Euro market is very/overly strict on many things regarding safety and that's where it's built so that's the mentality your dealing with.



Their thought is that they could control and balance its orbit by mechanical means, but due to the nature of a random orbital the backing plate spins freely/uncontrollably, so they designed it to "rub" the backing plate to control the "excess" backing plate rotation that may be created. The washer lifts the BP just enough to allow the backing plate to spin free again, just like it is on the Griots, Meguiars, Porter Cable and most other DA's used for polishing paint.



Now if the question is why do you need or want the added backing plate rotation then I'd suggest reading Kevin's article on that.



Hope this helps

Mike
 
Greg Nichols said:
the worst that could happen is the pad flys off...
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Which most of us have probably had happen during moments of carelessness :o or when trying to dry pads that way (lesson- use a rotary for this instead).



But I bet it's not all that great on the machine's internals either :think:
 
My question is, why would you run the machine unloaded? What's the point? That's not how the machine was designed to operate in the first place.
 
Accumulator said:
But I bet it's not all that great on the machine's internals either :think:
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Make sense...I hope you are wrong though I simply hates turning off and on between sections, feel more tiring and waste time being a simple action that is.
 
sulla said:
.. I simply hates turning off and on between sections, feel more tiring and waste time being a simple action that is.
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I work such small sections at a time that I'm always stopping/starting anyhow, but I know what you mean. I sometimes feel like I spend as much (or more!) time cleaning the pads as I do polishing!
 
Accumulator - I am the same. the compressed air does gets put to good use to clean pads between each section. best way to achieve a great finish IMHO. 1 pad per half a hood, roof and boot, blow clean after each section of each panel.



might take a few seconds each time but worth it
 
My rupes also has an awkward trigger lock.. Had to push it in towards the upper left 11 o'clock position to get it locked..Another reason why i hate turning it off.
 
vegas911gts said:
Does anyone sell the rupes with the washer mod already in place or at least sell the washer?
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As Kevin pointed out, all you need is a 3/16" thick-5/16"-24 washer. Trim both sides to fit the Rupes backing plate..done.
 
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