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  #21  
Old 02-26-2017, 04:37 PM
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Quote:
Originally Posted by Shade Tree Welder View Post
Here is the electrical drawing, the 'speed control' is a lot more than just a
speed control.
There is a shadow in your picture, I cant see if there is a black plastic cap behind the pots metal cover.

If so, the plastic cap may house a switch and if the pot is pulled away it will not engage the switch. that is if the pot switches power on/off at its zero range.

the pot will have to be broken up pretty good for it not to work, at least it would likely work at one end of its range.


cant see every thing in the pictures. if the heatsink came in contact with whatever it may have blown the fuse, it depends on the transistor and how it is insulated along with the heatsink..

Get the part number off the transistor, likely >$3.00
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  #22  
Old 02-26-2017, 04:59 PM
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Quote:
Originally Posted by pepi View Post
They do not sell such hi tech stuff any more, the best they last had were cell phones, and memory chips....... in Atlanta they have gone belly up... Why to many stupid people with no clue... Remember Heathkit ... ?
Up until they went under Stupid people did not know you could have them order just about anything and have it in a few days,
that included their famous gold pin tubes.
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  #23  
Old 02-26-2017, 05:43 PM
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Quote:
Originally Posted by Shade Tree Welder View Post

Not my equipment, not my money...
O.K. fine then.

I'm done.

Nothing more to see here....move along please.
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  #24  
Old 02-27-2017, 11:02 AM
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Quote:
Originally Posted by digger doug View Post
O.K. fine then.

I'm done.

Nothing more to see here....move along please.
I got parts quote this morning from my LWS, Atlas also responded and said
that they only sell parts through distribution.

Parts cost
0-02 speed control --- $86.00
2-29 worm gear ------ $52.00

I spoke with Bob he is the owner of the shop. Explained to him that there is
clear evidence the machine was dropped with broken teeth on the gear and
the damage to the speed control. I did explain to him the option of trying to
just replace the potentiometer on the board but with the blown fuse there
might be more damage on the board, we just don't know, and just replacing
the Pot. might not fix it.

He needs the equipment back in service quickly, you have to keep in mind
that this is not hobby shop. He options for meeting customer work is fixing
this machine or purchasing new. The decision process is different.

Hobbyists generally don't have to include time and do not have customer
orders to consider. $86 is stupid expensive but hey, a one off gear is going
to be a lot more locally supplied.

Parts are on order. Fuses will be supplied locally.
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  #25  
Old 02-27-2017, 02:05 PM
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Quote:
Originally Posted by Shade Tree Welder View Post
$86 is stupid expensive
Not really. The little Leeson 90v dc variable speed control boards I've used on Mildred's table drive, the head lift and Charlie's (lathe) motor usually cost around $150 & up.
I lucked into an ebay deal for 4 of them years ago or those projects might not have happened.
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  #26  
Old 03-06-2017, 11:58 PM
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Got the parts in today, got the gear installed. Found another broken wire.
Got that on order along with some 2A fuses... Pedal works save for the
broken wire, replaced the gear with the broken teeth. Jumped things and
it all works. So almost done.
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  #27  
Old 03-12-2017, 12:43 PM
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Well last night finally got around to working on the positioner. All is good!

It Works.

Replaced:
  1. Speed control, just not worth fixing.
  2. Fuse, blown
  3. Gear, 3 broke teeth, rotating the gear would have still had a bad spot just moved to the other end of the sector...
  4. Wire, broken wire, replace with heavier insulation.

The broken wire was my first real surprise, got it all together but the foot
pedal did not work, I could jump the pedal and the motor ran. Found the
broken wire. Ordered new wire.

Then last night op tested it with the new wire and nothing. Jump the wire
and nothing, get the meter out and start looking for where I do and don't
have power, short story the GFCI was tripped at the wall, reset, all it good...
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  #28  
Old 03-12-2017, 01:00 PM
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A lot of GFI do not like brush motors .Some codes require one in hall .Usually put in for inspection then pulled out so vacuum cleaner will not trip it.
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  #29  
Old 03-12-2017, 09:32 PM
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Good, good.
I have had to drive 15 miles out to Lake Ransom just to find & reset one of those damned things.
The outlet in the hall bathroom was wired to also control the light fixtures in two bedrooms.

How much did the parts wind up costing?
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  #30  
Old 03-13-2017, 10:17 AM
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LWS supplied the Speed control and the gear from Atlas.

Speed control was $86 gear was $52 plus taxes, Total was $148.35

McMaster cable $6 and fuses (5) $8.33 plus tax and shipping $18.75

$167.10
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