welcome to the forum. im not familiar with this brand. did you get instructions with it? if so, try rechecking all the connections. is this unit foot operated or palm control? perhaps one of our members can chime in on this. good luck
if titanium ,simply applying variable dc voltages can produce a wide range of colors. it is easy to do but there's a good deal of practice needed before one can confidently work on an expensive knife. a variable dc power supply is required to do this. also an etching acid and electrolyte...
years ago i tried plastic pellets (white} that were formed using warm water. cant remember the brand name. i found such to be more of a mess than a useful tool. i gave the stuff to one of the forum members. i cant remember his name. brain fog has taken it's toll.
without a specific foto it's a guess. heat treatment, oxidizing chemicals, electroplating, brush plating comes to mind. the book by james b. meeks shows a way he would chemically color a gun and selectively erasing areas to show tonal gradation. many ways to skin that cat
we are all different. yet similar in many ways. whatever your setup, you must adapt all to suit yer body. to work in comfort is mandatory. 8 hours at the bench can be a bit tiring or quite a pain. don't be quick to "nail things down' until you know it's comfortable for you.
my first power toy was the n-gravr. i spent perhaps 40 minutes on the phone with ray. only about 5 of those minutes were needed to clinch the deal. the balance of the time we spent swapping lies and whatnot. a real cool guy to have dealt with. my heart goes out to his family and friends.
i bought a stone sculptors pneumatic hammer years ago. i controlled the thing nicely with an "old style, die cast" pneumatic pencil air blower. it was the type with a lever actuator. very sensitive. such could be mounted on a wood block for use as a nice foot pedal. they usually go now for...
to me it clashes with or detracts from the main design. what you wat is for a pleasant flow from start to finish. your changes disrupt any sort of flow.
till you get a better, heavier vise try turning the tension bolt all the way in if there is one may help. or if there's a hole in the vise. put a dowel pin in. you may find the pin will engage a matching hole in the bottom half.
how deep is your engraving ? perhaps you're diving in way too...
i found in my early days an art projector would help. blow it up giant size on a wall. this can sometimes help to see what yer eye otherwise ignores. in the case of your example, i'd start at the bottom with a slightly smaller scroll. progress forward in like fashion. you could then surround...