- Joined
- Jan 10, 2016
- Messages
- 29
Hello folks, a couple of months ago I purchased Hitorgue mini mill (3990 - fixed column model) and only now was able to complete its installation (putting it on a removable base clamped to my workbench, tramming and DRO install). I am new to milling and not sure about what kind of precision to expect from this mill.
Here is what I noticed: When trying to use my vise with the key slots (not to tram it every time) it was not sitting straight (DTI was showing about 0.05 mm (0.002") difference over 3" (75 mm ) of the jaw length of the vise.
I put DTI over the front of the table (x axies) and it seems to be acceptible at just a 0.01mm (0.0004) over the table length - about 15 inches measurable distance.
Here is the pic
Then I measured the slot and lo and hehold - it gives 0.10mm difference
The back of the table is straight too (this is why I didn't notice this during the DRO installation) but both slots are crooked about the same amount.
Both the indicator and the holder are quality and all of the results are repeatable.
The question is this normal? To translate metric into inches 0.1 mm (10 notches on my metric DTI which has a 0.01mm resolution) equals to about 0.004 of variance over the 15 inches. My question is if this is to be expected for hitorque machines or should I ask for a replacement table?
Here is what I noticed: When trying to use my vise with the key slots (not to tram it every time) it was not sitting straight (DTI was showing about 0.05 mm (0.002") difference over 3" (75 mm ) of the jaw length of the vise.
I put DTI over the front of the table (x axies) and it seems to be acceptible at just a 0.01mm (0.0004) over the table length - about 15 inches measurable distance.
Here is the pic
Then I measured the slot and lo and hehold - it gives 0.10mm difference
The back of the table is straight too (this is why I didn't notice this during the DRO installation) but both slots are crooked about the same amount.
Both the indicator and the holder are quality and all of the results are repeatable.
The question is this normal? To translate metric into inches 0.1 mm (10 notches on my metric DTI which has a 0.01mm resolution) equals to about 0.004 of variance over the 15 inches. My question is if this is to be expected for hitorque machines or should I ask for a replacement table?
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