Hope folks can help me here
Got an old logan model 200 that I have taken apart, cleaned/regreased the bearings, painted the unit, etc. Some teeth were missing on one of the reverse gears and on the mitre gear in the apron (have found replacement parts for these)
Without the back gear engaged, the unit runs very well (did not do that prior to the refurbishment)
However, I am having problems with the back gear alignment to the shifter rack
I have followed these instructions
http://lathe.com/ll-group-archive/logan_lathe_back_gears.html
the issue that I have is when I roll the eccentric around to engage the back gear....I roll it as far as I can (it then becomes an interference at the gears and no backlash). When I put in the shifter rack, as it advances into the headstock it starts to move the eccentric, so backlash starts increasing. By the time I get to the latch position, the back gear is mostly not engaged.
The only way I can see around this is if the eccentric shaft can never achieve an interference between the two gears. It's like I need to rotate the eccentric shaft/gear another 20 degrees or so....but am not able to ....because I achieve a zero backlash and interference
I have had the unit all apart and the spindle out....but do not see any errors in how I have put it back together (and it does run very well with no backgear engaged)
any thoughts?
Got an old logan model 200 that I have taken apart, cleaned/regreased the bearings, painted the unit, etc. Some teeth were missing on one of the reverse gears and on the mitre gear in the apron (have found replacement parts for these)
Without the back gear engaged, the unit runs very well (did not do that prior to the refurbishment)
However, I am having problems with the back gear alignment to the shifter rack
I have followed these instructions
http://lathe.com/ll-group-archive/logan_lathe_back_gears.html
the issue that I have is when I roll the eccentric around to engage the back gear....I roll it as far as I can (it then becomes an interference at the gears and no backlash). When I put in the shifter rack, as it advances into the headstock it starts to move the eccentric, so backlash starts increasing. By the time I get to the latch position, the back gear is mostly not engaged.
The only way I can see around this is if the eccentric shaft can never achieve an interference between the two gears. It's like I need to rotate the eccentric shaft/gear another 20 degrees or so....but am not able to ....because I achieve a zero backlash and interference
I have had the unit all apart and the spindle out....but do not see any errors in how I have put it back together (and it does run very well with no backgear engaged)
any thoughts?