There has been some discussion about threading dials on here. I heard somwhere that Shoptask once had an " electronic" thread dial. Anyone know what this was?
Very hard to cut threads correctly with this setup. It takes great hand and eye timing and in the end your just plain lucky if the thread turns out correctly. Trust me on this, I have it on my Shoptask.
I once thought about using the sensor and timing circuit to trigger a solenoid to engage the feed.
It is hard to beat the utility of analog devices (ie., dials) for hand/eye coordination. That's why I won't have a digital dial indicator around the shop to use for setups: I hate staring at a digital feedback system.
First you get good, then you get fast. Then grouchiness sets in.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
I don't have the electronic thread indicator on my combo machine.
When I used to cut threads on it I just backed the tool out at the end of the thread, and stopped and reversed the spindle to a point past the start point of the thread to take up slack in the gear train. set depth of cut, then turn on spindle for next cut.
Reversing spindle was easier than cranking handle to get back to start point anyway.
Are the new machines any thread friendlier than mine.
Are there any other ways to thread on machines like ours with no half nuts.
I guess kinda like metric threading with an inch leadscrew.
1. Choose the X carriage start position and the Y axis position ( put a little drag on the carriage locks and always move in the direction of cut to take out any lash and set the DRO to zero.
2. Choose a point on the spindle indexer as your start point.
3. Move the Y axis to the depth of the first pass, engage the X axis gearbox in forward and engage the Hi-low spindle to start the cut.
4. At the end of the cut shift the X axis gearbox into neutral, back the y axis out beyond the zero point and shift the X gearbox into reverse to return past the zero point.
5. Shift the hi-lo spindle into neutral, bring the X axis carriage back to the start point, set the Y axis for the depth of the second pass, bring the chuck around to the start point on the indexer, shift the X gearbox into forward and engage the hi-low spindle for pass # 2
6. Repeat as many times as needed.
Sounds a bit complicated when written out, but once you have done it a few times it becomes second nature.