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Posted: Thu Aug 01, 2013 10:19 am
by JPG
Ahh! Hands(eyes) on is a very useful diagnostic tool!
I do not recall any previous mention of stopping or slowing down in the middle of a pass.
A loose bearing mount would indeed contribute to vibration etc.
Hooray!!!!!!!!!!!!!!!!!!
I assume Rob helped with setting the blade height as well.
Kudos Rob!
I wondered where you were(no posts to this thread).
Posted: Fri Aug 02, 2013 12:47 am
by SDSSmith
rdewinter wrote:My jointer problems have been fixed!!!!
The problem with the jointer stopping or slowing down in the middle of the cut was caused by the lower hub ( that drives the coupler) was loose and was slipping causing the jointer to slow down or stop. Simply tightening the set screw was all that was needed.
The biggest problem was setting the jointer knives. And I owe a big thank you to Rob Diggs (sdsmith51) who realized my frustration with setting the knives and diagnosed the problem. After setting the knives properly, he noticed that the problem with the knives hitting the out feed table was the cutter head had moved slightly toward the out feed table. He aligned the cutter head and the problem was fixed. After tightening all the cap screws, a pass over the jointer yielded a very nice square edge.
Thank you Rob. It sure is nice living in the same area and having such a nice thoughtful person as Rob nearby. Rob also passed along some jointer knife sharpening/honing tips. Rob really epitomizes that we all our really a ahopsmith community and willing to help each other out when in a bind or just have a question.
As always Bob, it was my pleasure.
Posted: Fri Aug 02, 2013 8:45 am
by wa2crk
With all of the problems with loose screws on equipment (SPT) when using the PP headstock it may be a good idea to use a small amount of blue Loctite when doing maintenance. Especially on screws that may come loose and are difficult to reach during normal operation.
Anyone using a PP should check the set screw on the motor pully and make sure it stays tight. Mine loosened twice and was retightened and finally loosened again and caused a rumbling noise after it backed all the way out and I found it in the motor pan.
The PP motor control system seems to cause problems that were never seen with a standard induction motor.
Bill V
Posted: Fri Aug 02, 2013 10:03 am
by dusty
wa2crk wrote:With all of the problems with loose screws on equipment (SPT) when using the PP headstock it may be a good idea to use a small amount of blue Loctite when doing maintenance. Especially on screws that may come loose and are difficult to reach during normal operation.
Anyone using a PP should check the set screw on the motor pully and make sure it stays tight. Mine loosened twice and was retightened and finally loosened again and caused a rumbling noise after it backed all the way out and I found it in the motor pan.
The PP motor control system seems to cause problems that were never seen with a standard induction motor.
Bill V
Testing to detect this sort of event is what I did in my previous life. It was my purpose to torture the equipment (temperature, humidity vibration, shock, etc) to its point of failure. If I could not bring it to that point, it was seen as having not completed my job.
Point: Everything will fail if you torture it long enough.
I seriously doubt that the Power Pro Headstock was subjected to that sort of testing. That testing is now being done "in the field".
Posted: Fri Aug 02, 2013 4:10 pm
by JPG
wa2crk wrote:With all of the problems with loose screws on equipment (SPT) when using the PP headstock it may be a good idea to use a small amount of blue Loctite when doing maintenance. Especially on screws that may come loose and are difficult to reach during normal operation.
Anyone using a PP should check the set screw on the motor pully and make sure it stays tight. Mine loosened twice and was retightened and finally loosened again and caused a rumbling noise after it backed all the way out and I found it in the motor pan.
The PP motor control system seems to cause problems that were never seen with a standard induction motor.
Bill V
Not surprising. An induction motor has less 'instantaneous' torque and no braking torque and no torque increase with increasing load.