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Thread: Small SCM slider repairs SI 16 SF

  1. #61
    Here are some photos of the start button. I didnt realize it came apart, inexperience not enough lighting and ancient eyes. Surprised how well it all comes apart and easily. A question for you electron guys can a little blob on the contact be enough that it doesnt make contact? its shiney figured current would still pass.

    Insde the panel, shortened the white, Problem not solved just got rid of the monty python piece of wire

    2.JPG


    Inside the panel the right button is scoring saw start not working the left is the main motor. Changed at sorting out time to at least get the main motor running

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    start switch removed, simple twist the part on the front panel after loosing the two slotted screws

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    Before I realized I could take this apart I cut two slots on the left with a die grinder thinking I could get paper in to clean the contacts. I did with double sided auto body paper but it still didnt work. Later with some light and glasses could see it comes apart

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    This broke down to about 10 little pieces but the main thing you could get at the contacts to file them. Im not sure if I have a point file maybe just found the finest one I could

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    Here are two photos of the blobs I was talking about. Removed and filed the four contact surfaces. LIkely my file was too coarse.

    12.JPG Capture.JPG


    exceded my limit oh well
    Attached Images Attached Images

  2. #62
    and here the moving part is sort of flopping around, one more problem, thought about putting epoxy in to keep it in place so it always aligned perfectly there is still the one main spring in there

    10.JPG


    Ended up bending that part and tried it 20 times worked perfectly. Power back on and it worked in all the testing. Im wasnt apposed to buying a new part but told not available and likely take me time to find a used one,. Its running so can take my time now to find some used parts

    13.JPG

  3. #63
    Join Date
    Feb 2011
    Location
    Central WI
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    you can find those on ebay. Measure the diameter of the hole. Some are NO and some are NC ( normally closed ) and some ( most ) can be wired either way. Lots of choices in start stop buttons. Dave

  4. #64
    cant even see what I posted, have to log off to read your post Dave., Electrician said anthing lots available. Wasnt into changing it if I could repair it start button works its done id be waiting for whatever ordered and im just as well to keep it original.

    Do you know on the main shut off if arcing is the main cause of failure on those, if it is then im up for taking that apart and finding the right file. Ill find back up at another time but have it working now

    thanks w

  5. #65
    here is the handle repair, I liked the idea here best of the insert with a shoulder on the back then rethread the handle if possible. Likely that didnt work but he did rethread to 3/8", I mentioned poeple dont like Tapcons, he said some people dont use them correctly then I told hiim there is not much meat here only 1/4" he said yeah he could put a nut on the back. He works on airplanes at some point I have to let people do their thing.

    Hes put a washer on the one side, a tapcon inside and a nut on the back. Likely be strong and hold time will tell.


    Washer on this side

    1.JPG

    nut on the back side

    2.JPG

    slider bearings next, got timkens with Rubber dust shields as suggested and will grease the outside as Peter suggested. Input from everyone appreciated.

  6. #66
    also on the HP if you convert KW to HP you need your voltage. For Amps say in this case 9 amp motor how do you figure HP, Ive always figured its close to 1 Hp per amp at 600 volts, close on most of my machines that have both listed on the plated.

    I looked it up other day and could not find voltage entering into it. Converting from KW it was something like 8.9 HP. Then someone had said here they are fairly tail HP. I realize there is some efficiency factor it was on one forumala at 65 percent other stuff I read said real world on these its 90 percent.

  7. #67
    Join Date
    Feb 2011
    Location
    Central WI
    Posts
    4,665
    .75 kw = 1 hp approx at any voltage. the amps change with the voltage. Most SCM motors are 5.5 kw @ 50 hz or 7.5 hp @ 50hz. When the motor is run at 60hz the kw goes to 6.6 and the hp to 9. At 240v the motors draw FLA of about 20-22. Dave

  8. #68
    thanks Dave, plate says 60 HZ, 6.6 KW and 9 amps.

    more questions to follow three speeds 35 years two saws with one speed, guess it relates to blade size, splitter geez never had one of those have to take it off see it moves for 14" blade and likely 16" or maybe not. Have blades will need a rip blade for it but have a good assortment of others in two sizes likely 12 and 14"

  9. #69
    6.6kw is just at 9hp. 9amps is probably at 440v.

  10. #70
    9 amps 600 volts

    tttt.JPG

  11. #71
    Not sure where to source 1000v switch gear. Lol.

    I take it you are in canada?

  12. #72
    I think so, is that bad

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