Why are the needles jamming in the carriage plate when using the ribber bed. It jams on the top needles. I have tried everything I can think of to cure this problem. The carriage glides over both beds when no needles are in use. Brother KH890 top bed with KR850 ribber bed.
I've been thinking over your problem and have the following suggestions.
Have you tried pushing up the ribber to knitting position and putting needles on only one bed at a time into work and running the carriages across? By trying each bed separately it might be possible to find out which needles are causing the jam.
You might get problems if the ribber is set too high. The manual will tell you how to check whether it is at the right height.
Have you got the pitch right? P for alternate needles in work:
l . l . l . l . l
. l . l . l . l .
H for when you are knitting with blocks of adjacent needles opposite each other or full needle rib. In the following examples if you had the setting on P, the needles would hit into each other and cause a jam.
l l . l l . l l
. l l . l l .
I have the same problem. I've replaced the sponge bar. The main bed and the ribber have both just been reconditioned. None of the needles are bent. I have checked that the connecting arm is perfectly positioned. The needles still jam. I would be really grateful if someone could tell me what I'm doing wrong.
Have you checked the condition of the sponge bar on the main bed? If the foam does not put enough pressure on the needles they lift up slightly and can cause problems. The foam showing above the metal should be about 1/4 inch thick. If the foam is compressed the bar will need replacing.
Another thing to check is that the connecting arm is seated properly on the main bed carriage before tightening the thumb screws.