RE(OANDP-L)VARIABLE SPEED RESPONSES
ANDREW COX
Description
Collection
Title:
RE(OANDP-L)VARIABLE SPEED RESPONSES
Creator:
ANDREW COX
Date:
6/10/2001
Text:
Here are the responses to variable speed trautman question. All failed to convince me of its merits as you can get exellent results via hand skills and common sense with a fixed speed, but to each their own and everyone has their own way of achieving the same results. I think it is best summed up by the final response
Cheers Andrew Cox
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Unless you lower rpm, you will melt polypro while finishing edges. At a
slower speed, one can finish this material far more efficiently. A slow speed
however, is inadequate for sanding laminates.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
AMEN, BROTHER! Me, too. I have no need for variable speed either and am
quite capable of adjusting the amount of pressure required for plactics,
foams, laminates, wood, metal, leather, etc. as needed. Maybe these V.S.
(variable speed) people are just educated beyond their intelligence. Or
maybe it's just that common sense is not so common? Have a great day.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Your guess is as good as mine. Maybe with some of the thermoplastics, you have to slow down the machine to get a good edge, otherwise the plastic will melt.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I've never used a variable speed grinder but I think it's a great idea. Then
I'd be able to use polishing mops at the required slower speeds without
overheating the plastic and ruining the finish.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
With some plastics a lower speed helps prevent the plastic from getting too
hot and gumming up particularly some of the softer flexible materials. In
practice I don't use the varible speed that often but perhaps I should. A
case can be made for slowing down in order to go faster.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I thought exactly the same as you -- i.e., who needs to vary the speed of the
long-shaft router? -- until I got one with variable speed. Great for putting
on larger diameter tools, or for buffing low-temp materials where you don't
want to melt them, etc.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Higher speeds means more friction which causes more heat. When buffing some
materials, ploy pro for example, the edge of the socket melts at high
speeds. If you can lower the speed it tends not to get tacky.
We do not have a variable speed trautman. Would like one with reverse,
though!
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
It is extremely easier to smooth and polish thermoplastics at a slow speed.
The plastic won't have the tendency to melt or burn.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
E.g., I use it in order to buff thermoplastic edges without melting it. I
rarely adjust the angle myself.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Variable speed only makes the job easier. Especially on sticky low temp
plastics like Surlyn.
Cheers Andrew Cox
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Unless you lower rpm, you will melt polypro while finishing edges. At a
slower speed, one can finish this material far more efficiently. A slow speed
however, is inadequate for sanding laminates.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
AMEN, BROTHER! Me, too. I have no need for variable speed either and am
quite capable of adjusting the amount of pressure required for plactics,
foams, laminates, wood, metal, leather, etc. as needed. Maybe these V.S.
(variable speed) people are just educated beyond their intelligence. Or
maybe it's just that common sense is not so common? Have a great day.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Your guess is as good as mine. Maybe with some of the thermoplastics, you have to slow down the machine to get a good edge, otherwise the plastic will melt.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I've never used a variable speed grinder but I think it's a great idea. Then
I'd be able to use polishing mops at the required slower speeds without
overheating the plastic and ruining the finish.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
With some plastics a lower speed helps prevent the plastic from getting too
hot and gumming up particularly some of the softer flexible materials. In
practice I don't use the varible speed that often but perhaps I should. A
case can be made for slowing down in order to go faster.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I thought exactly the same as you -- i.e., who needs to vary the speed of the
long-shaft router? -- until I got one with variable speed. Great for putting
on larger diameter tools, or for buffing low-temp materials where you don't
want to melt them, etc.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Higher speeds means more friction which causes more heat. When buffing some
materials, ploy pro for example, the edge of the socket melts at high
speeds. If you can lower the speed it tends not to get tacky.
We do not have a variable speed trautman. Would like one with reverse,
though!
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
It is extremely easier to smooth and polish thermoplastics at a slow speed.
The plastic won't have the tendency to melt or burn.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
E.g., I use it in order to buff thermoplastic edges without melting it. I
rarely adjust the angle myself.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Variable speed only makes the job easier. Especially on sticky low temp
plastics like Surlyn.
Citation
ANDREW COX, “RE(OANDP-L)VARIABLE SPEED RESPONSES,” Digital Resource Foundation for Orthotics and Prosthetics, accessed November 22, 2024, https://library.drfop.org/items/show/216656.
