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Started by RichColvin, August 12, 2017, 04:26:56 PM
Quote from: RichColvin link=topic=3339.msg20136#msg20136 date=1502548016I've been thinking of motorizing my TT-50 truing tool. The thinking is that it would allow it to run slower (I sometimes get impatient and run it too fast). It would make it run consistently, and I can enjoy a cup of coffee whilst it runs ("Look ma, no hands!").Rich
Quote from: Elden on April 10, 2013, 03:47:09 AMI am in the process of making another gizmo he mentioned. He made a wooden cup to fit on the knob (friction contact) of the TT-50. It has a spindle like piece fastened to it so that it can be chucked in a cordless drill. The cup is held in contact with the TT-50 feed advancement knob and is rotated with the drill on low speed. This gives a consistent and even feed rate. For me that would be great as my left hand does not function well. I have to advance the TT-50 one handed. If it works well for me, I envision making the cup of rubber from an old forklift tire eventually. The cup possibly would be of metal with a rubber insert.
Quote from: justme on December 19, 2017, 05:52:10 AMOne would think that a high torque, low speed stepping motor with micro switches at either end and a selection switch would do a really nice job. Two (2) passes at a given depth should ensure that the surface is absolutely smooth. Selection switch would determine the speed across the stone - with four options: SB-250, SG-250 coarse, SG-250 fine and SJ-250. Granted, truing tool "this way" would be more expensive, but at least you'd know that each stone was 'trued' to what Tormek suggests, as they know/expect a stone to be in a certain condition for optimal function - likely quite a bit of engineering time. At a minimum, would suggest two passes to ensure that the both edges of the stone are addressed in both directions - three passes may be a bit much?Perhaps one of the engineering folks at Tormek might chime in as to whether this might even be plausible (or not).There was a post on youtube about an issue whereby someone only did one pass and experienced some anomalies. I don't recall the post, but there were three parts (separate videos) about the issue. Suspect that speed across the stone, combined with variations in pressure and potentially the number of passes - had an impact. One could easily see where this could happen.Thoughts?
Quote from: justme on December 21, 2017, 07:39:55 PMKen,The original reason for 'my' commentary is the premise that an organic engine input (hands) likely would have an impact. For example, learned that the SJ-250 needs an *extremely* slow movement. (>90 seconds) otherwise, you'll end up with what appear to be "waves" on/in the stone. Resulting in the need to make multiple passes to "fix the fix".
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