Re: Understand existing Acorn Mill
Posted: Mon Jul 07, 2025 2:44 pm
The acorn_mill_plc.src program you posted does not have any "custom" changes in the lube section. You can just use the Wizard.
Some lube pumps with electronic timers will not work optimally with P179=0.
For example, one with a "lube-first" timer, which pumps lube whenever power is first applied, and then "sleeps" for however long its interval timer is set before lubing again, will pump too much lube if you run many short program cycles.
One with a "lube-last" timer, which immediately "sleeps" when power is applied, and then pumps lube after the interval time has elapsed (provided that power remained on), will pump too little lube if you run many short program cycles.
In both cases, setting P179 to keep the lube pump power on for some minimum number of minutes -- corresponding to the interval timer setting on the lube unit -- will bridge over the short program cycles and allow the lube unit to work as desired.
If you have a Bijur-style lube unit with a mechanical timer (clock motor, cam, and plunger) then it will work just fine with P179 = 0.
Some lube pumps with electronic timers will not work optimally with P179=0.
For example, one with a "lube-first" timer, which pumps lube whenever power is first applied, and then "sleeps" for however long its interval timer is set before lubing again, will pump too much lube if you run many short program cycles.
One with a "lube-last" timer, which immediately "sleeps" when power is applied, and then pumps lube after the interval time has elapsed (provided that power remained on), will pump too little lube if you run many short program cycles.
In both cases, setting P179 to keep the lube pump power on for some minimum number of minutes -- corresponding to the interval timer setting on the lube unit -- will bridge over the short program cycles and allow the lube unit to work as desired.
If you have a Bijur-style lube unit with a mechanical timer (clock motor, cam, and plunger) then it will work just fine with P179 = 0.