phantom pins

[mikelong_300]

when the distributor indexes from the 5 pin to the 6 pin, the stop blades fail to catch the blade and its almost like a pin trips the fingers(but nothing presses down on them) and moves on to the 10 pin.. while transferring between 6 and 10, a pin slides past the fingers, into the slot and releases the stop blade, but the blade is on the bottom doing its previous cycle. there is where it waits for a pin to come like normal, and there you go a double pin feed. so question.. what causes the stop blade to fail to catch the blade only in that position, and only part of the time. both parts are new with no sign of wear.

[Kat]

Eccentric Roller Adjustment and/or Bent Carriage Tubes.

[MarkyB]

Both parts are new- here is your problem, your looking at the wrong area of the distributor, If your eccentric rollers are in good order (no play side to side) and set correctly, then your next port of call is the trip rod that connects to the stop blade, the nylon rollers over each side of this rod should not touch it in any position when there is no pins going over the arm to index the dist, it should have an equal gap top and bottom, this is adjusted by the trip rod that connects to the fingers and the D plate, lengthen/shorten till there no longer touching,

i'd edge a bet that you have a trip cable instead of a rod? I hate these things, basically when set up and under tension it cannot move to become longer, but without tension, as its a cable you can make it shorter, this cannot happen with a rod, so if theres a bind anywhere it wont return to where it should be and may cause random indexing.

Just some ideas for you.

[8270king]

Some belts cause the carriage to move forward quickly with much force - this causes the stop blade with too much force and index

I have some distributors where the springs are stretched to give less help for the carriage to move

[Tablejam]

Some belts cause the carriage to move forward quickly with much force - this causes the stop blade with too much force and index

I have some distributors where the springs are stretched to give less help for the carriage to move

If all other parts are good then I agree with this.

[mikelong_300]

it does make sense, it seems like it is almost poping(not sound but force almost leaping forward) when it extends the extra inch or so coming off the 5 pin which may be just enough to jar it from the stop blade.. it was a new spring connecting the distributor cam wheel to the carriage, so i stretched it a little, and it tamed down a little.. is that what you were referring to?

[mikelong_300]

i do have a rod, not a wire.. eccentrics looked good as well.. no play side to side.. spun freely

[Tablejam]

Just a random question.... when the distributor clutch is waiting for a pin to go off the end, is the stop blade lined up with the clutch plate finger or is one higher than the other?

I have seen the distributor skip the 5 or 6 when.....

-eccentrics are sloppy or not adjusted correctly
-stop blade is not lined up with the clutch finger
-the linear extension spring and or stiff belt causes the carriage to extend too fast
-the linear extension spring is too weak causing carriage to extend too late, causing false indexing

...there are probably some other ones too but those seem to be the most common.

[slb785]

Some belts cause the carriage to move forward quickly with much force - this causes the stop blade with too much force and index

I have some distributors where the springs are stretched to give less help for the carriage to move

Using the black rough top belts, i actually run without a linear spring at all for the first month or two until the belt is broken in. The first one i put in i left the spring on and it jammed up like 15 times a day, every time at the 4. Removed the spring, not a call for months.

[inthepits]

i do have a rod, not a wire.. eccentrics looked good as well.. no play side to side.. spun freely

there should be a slight drag on the eccentrics... if they spin totally free they're loose, which will cause the skip.

[Tablejam]

there should be a slight drag on the eccentrics... if they spin totally free they're loose, which will cause the skip.

If they spin totally free they are not contacting the carriage tube.

[inthepits]

If they spin totally free they are not contacting the carriage tube.

Thats my thought too Tj... going like a missile lol

[Tablejam]

Lol.....

[Grit]

2nd the check your trip blade alignment suggestion. when you said skipping that is what comes to mind.

[Bobby B]

I found that the problem is in the belts. the old style belts had a stiffer backing' back in the 70's and 80's i could run a dist with out the spring to pull it up. I now only on machines that give me trouble add a sweep/table cam spring to the stop blade problem goes away.