Chinese DRO for Mill
Chinese DRO for Mill
I have a low cost Chinese DRO (Jing Model JCS900-2AE) which I installed on my mill. It works great with one exception - the lost power reference position (RI) recovery feature doesn't work. Wondered if anyone else had experienced this and been able to solve it. The JCS900 is very similar to the mTECH-2di sold by thedrostore.com. There was no procedure for putting in a machine reference during setup, which some DRO's require. Instead it seems to rely on a hardware reference on the optical scale, which I don't know if my scales have.
Re: Chinese DRO for Mill
The scale has some internal absolute marking at the midpoint. The instructions for my Chinese DRO say you must cross that point after you invoke the function, at which point the DRO adjusts the reading to the offset from (the hidden) absolute that was saved during the last power down.
Almost everything I make is a one-off part of some sort. For me, recovering yesterday's reference point is pretty near useless, because I am working on something different today and will be doing a new setup anyway.
EDIT: And welcome to you. Most members here put a city, state in their profile so if someone says "here" in a post, the rest of us have some idea where here is.
Almost everything I make is a one-off part of some sort. For me, recovering yesterday's reference point is pretty near useless, because I am working on something different today and will be doing a new setup anyway.
EDIT: And welcome to you. Most members here put a city, state in their profile so if someone says "here" in a post, the rest of us have some idea where here is.
Re: Chinese DRO for Mill
Thanks for the suggestion. Tried it moving slowly in both directions with no response. Also tried at the end of the scale thinking perhaps the machine reference was located there - no luck.
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- Location: Winchendon Mass. USA
Re: Chinese DRO for Mill
What I've started to do if I'm worried about my location is to move the machine back to the original zero point X and Y then if you lose power you know what your location is.
Re: Chinese DRO for Mill
That's what I've been doing. The problem has been when I accidentally bump one of the axis hand wheels while the power is off. I have a small constricted shop.Sure would like to get the power off reference working since the instructions claim it has one.