Sawdust session / speed changer

mbcabinetmaker · Post by **mbcabinetmaker** » Sun Jan 30, 2011 9:13 am

I know that I have seen Nick in a session where he removed and reinstalled the speed changer in a machine. I though it was #24 but it is not. #23 has the high speed adjustment. Does anyone remember were to find the complete removal/installation?

beeg · Post by **beeg** » Sun Jan 30, 2011 11:30 am

Maybe ya need SS #17, but here's a listing from another member.

[ATTACH]11672[/ATTACH]

ddvann79 · Post by **ddvann79** » Sun Jan 30, 2011 1:41 pm

beeg wrote:Maybe ya need SS #17, but here's a listing from another member.

[ATTACH]11672[/ATTACH]

Yep, it's #17. I watched it a couple of days ago. It was curious to me that Nick left the speed all the way up when he turned the machine back on. I expected him to rotated the system down to slow first. He did that in a couple of episodes (or maybe it was a couple of times in the same episode).

dusty · Post by **dusty** » Sun Jan 30, 2011 1:54 pm

ddvann79 wrote:Yep, it's #17. I watched it a couple of days ago. It was curious to me that Nick left the speed all the way up when he turned the machine back on. I expected him to rotated the system down to slow first. He did that in a couple of episodes (or maybe it was a couple of times in the same episode).

He learned that trick from me. I hardly ever turn the Mark V down unless I know that it is going to be involved in a change over. It is not at High Speed but rather at saw speed most of the time.

There has been a lot of chatter about that being a no-no but I don't buy in.

The start-up current spike that occurs is high (well over 20 amps) but it is so short in duration that the breaker holds it. I've even done that with the Mark V on a 15 amp circuit.

Other than here where have you heard that a motor must be started with minimum load?

ddvann79 · Post by **ddvann79** » Sun Jan 30, 2011 1:59 pm

dusty wrote:...

Other than here where have you heard that a motor must be started with minimum load?

Dad told me that.

JPG · Post by **JPG** » Sun Jan 30, 2011 2:18 pm

ddvann79 wrote:Dad told me that.

The turn down is a carry over from the 3/4hp motors operating on overloaded 15A branch circuits. Tis true there is less stress if started at lower load. Also the ramp up time is shorter.

IMHO(and Dusty's) with adequate power source and 1 1/8hp motor cranking down is not a necessity.

However I would recommend turning it down if you intend to move the ss. That might prevent the belt dropping too low into the idler pulley.

dusty · Post by **dusty** » Sun Jan 30, 2011 3:31 pm

Obviously I agree EXCEPT for your position as stated in the first sentence. I have a 1/2 horse motor driving the belts sander and it starts right up on a 15 amp circuit. Does the extra 1/4 horse make that big a difference?

I know there are many reports from persons having difficulties with popped breakers that are attributed to starting that heavy load on a 15 amp circuit.

Until I witness it myself or have reliable confirmation that the Shopsmith was the "only thing" drawing power from the 15 amp feed, I am a skeptic. A properly maintained Mark V will operate reliably on a 15 amp circuit that is in proper working condition.

Simple things like a loose connection to an outlet in a wall plug can cause enough extra current draw to trip that breaker (and start a fire). If anyone is having difficulty doing this, I strongly recommend that an electrician or some one with electrical experience inspect the circuits.

ldh · Post by **ldh** » Sun Jan 30, 2011 4:16 pm

mbcabinetmaker wrote:I know that I have seen Nick in a session where he removed and reinstalled the speed changer in a machine. I though it was #24 but it is not. #23 has the high speed adjustment. Does anyone remember were to find the complete removal/installation?

Mark,
Try this site http://www.songofthegreatlakes.com/ssspeed for some good info on working with the speed changer. I use a cheap digital rpm tool and the adjustment tool that the gentleman uses is handy.
ldh

ddvann79 · Post by **ddvann79** » Sun Jan 30, 2011 4:27 pm

ldh wrote:Mark,
Try this site http://www.songofthegreatlakes.com/ssspeed for some good info on working with the speed changer. I use a cheap digital rpm tool and the adjustment tool that the gentleman uses is handy.
ldh

Think that link was broken. Here is it again.

ldh · Post by **ldh** » Sun Jan 30, 2011 5:24 pm

Thanks.......I just stuck it in and did not check.
ldh