Hello to all.
I am a new user and I am rebuilding a Mark V 500. When turning the speed control to increase speed it turns very easily. However when I decrease the speed the knob is very difficult to turn (much different that increasing speed). I have oiled the sheaths and the worm gear and the quadrant assembly look ok. What am I missing? Thanks!!
Steve
Stiff Speed Control
Moderator: admin
Re: Stiff Speed Control
Welcome!
It sounds like you already checked the likely sources of potential problems with the speed changer not moving smoothly.
Just to make sure, however, when you say you oiled the sheaves, did you oil both the upper and lower sets of sheaves? Also, when you say the worm gear and quadrant look ok, did you check for wear, alignment and impacted sawdust and congealed grease?
If those things all check out, I'm not sure where the problem would be.
It should take more force to go from fast to slow, but it's hard to quantify how much more.
It sounds like you already checked the likely sources of potential problems with the speed changer not moving smoothly.
Just to make sure, however, when you say you oiled the sheaves, did you oil both the upper and lower sets of sheaves? Also, when you say the worm gear and quadrant look ok, did you check for wear, alignment and impacted sawdust and congealed grease?
If those things all check out, I'm not sure where the problem would be.
It should take more force to go from fast to slow, but it's hard to quantify how much more.
Gale's Law: The bigger the woodworking project, the less the mistakes show in any photo taken far enough away to show the entire project!
Re: Stiff Speed Control
Thanks for the quick reply. Yes I oiled both the upper and lower sheaves. No built up grease or saw dust. The quadrant had some slight deformity but filed down easily. Might need to check alignment though. Also put on new belt, perhaps the belt need to break in.
Steve
Steve
-
ERLover
- Platinum Member
- Posts: 3914
- Joined: Mon Aug 31, 2015 10:19 pm
- Location: Greenie and Goldie Country not to metion the WI Badgers!
Re: Stiff Speed Control
I dont think it would be the belt, but which belt are you referring to?
KNOWLEDGE AND EXPERIENCE EQUALS WISDOM. Albert Einstein
The Greatness officially starts
Greenie, Grayling, SS stand alone BS and BS SPT, jointer and belt sander, 3 Ers with Speed Changers. I think those 3 cover my ER needs, and space for them.
The Greatness officially starts
Greenie, Grayling, SS stand alone BS and BS SPT, jointer and belt sander, 3 Ers with Speed Changers. I think those 3 cover my ER needs, and space for them.
-
JPG
- Platinum Member
- Posts: 35431
- Joined: Wed Dec 10, 2008 7:42 pm
- Location: Lexington, Ky (TAMECAT territory)
Re: Stiff Speed Control
ERLover wrote:I dont think it would be the belt, but which belt are you referring to?
Increasing speed, easy peazy(nothing resisting the control sheave movement away from the belt).
Decreasing speed, stiff(you are squeezing the motor belt and the floating sheave must respond by opening the motor pulley to release the tension).
Thus the rate at which the speed control is moved also has an effect. Slower = easier.
A newer(stiffer) belt will resist squeezing more effectively.
An ER SC resists both directions.
╔═══╗
╟JPG ╢
╚═══╝
Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
╟JPG ╢
╚═══╝
Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
Re: Stiff Speed Control
I have actually replaced both belts. The squeezing the motor belt and sheath makes sense. It just looked a little stiffer than some of the videos I saw. Perhaps since it is a new motor belt it is a little stiffer. Thanks for all the help. This forum is great and there is a wealth of info. Since I have little experience with SS just did not know the common things and the manual really do not mention the speed control being stiffer when decreasing speed.
-
ERLover
- Platinum Member
- Posts: 3914
- Joined: Mon Aug 31, 2015 10:19 pm
- Location: Greenie and Goldie Country not to metion the WI Badgers!
Re: Stiff Speed Control
Learned something already today about belts.
KNOWLEDGE AND EXPERIENCE EQUALS WISDOM. Albert Einstein
The Greatness officially starts
Greenie, Grayling, SS stand alone BS and BS SPT, jointer and belt sander, 3 Ers with Speed Changers. I think those 3 cover my ER needs, and space for them.
The Greatness officially starts
Greenie, Grayling, SS stand alone BS and BS SPT, jointer and belt sander, 3 Ers with Speed Changers. I think those 3 cover my ER needs, and space for them.
-
JPG
- Platinum Member
- Posts: 35431
- Joined: Wed Dec 10, 2008 7:42 pm
- Location: Lexington, Ky (TAMECAT territory)
Re: Stiff Speed Control
In order to 'keep it simple', SS ignores the direction and simply says 'Do Not'. Far easier to remember that way. 
╔═══╗
╟JPG ╢
╚═══╝
Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
╟JPG ╢
╚═══╝
Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
Re: Stiff Speed Control
Steve - I'll bet what you are missing is a simmple, but thoroughly oiling of the motor shaft and the movable sheave. This is the one lube that is often forgot.sadair wrote:Hello to all.
......I have oiled the sheaths and the worm gear and the quadrant assembly look ok. What am I missing? Thanks!!
Steve
Take off the belt cover and with your hands, pull out the movable sheave, remove the drive belt. Oil the shaft liberally. Now put the machine in drill press position. Put oil on the end of the shaft and allow it to drip/penetrate down.
Now lower the machine to saw position and again using your hands pull out the movable sheave several times. I think you will find it easier to move and your speed control easier to turn slower.
Octogenarian's have an earned right to be a curmudgeon.
Chuck in Lancaster, CA
Chuck in Lancaster, CA
Re: Stiff Speed Control
charlese wrote: Take off the belt cover and with your hands, pull out the movable sheave, remove the drive belt.
DO NOT let go of the sheave, return it softly. IF ya let it snap back, you'll have more problems.
SS 500(09/1980), DC3300, jointer, bandsaw, belt sander, Strip Sander, drum sanders,molder, dado, biscuit joiner, universal lathe tool rest, Oneway talon chuck, router bits & chucks and a De Walt 735 planer,a #5,#6, block planes. ALL in a 100 square foot shop.
.
.
Bob
.
.
Bob