The Shop > CNC
DDCSV1.1 4 Axis controller
John Stevenson:
Metric is G21, imperial is G20 in the code.
You normally have an initiation line at the start of a program that sets the defaults and resets any modal commands. Can't see any commands in the g code list to cancel them though.
Also no tool length offsets so need to be careful with Z zero
Joules:
Cheers John, G20-21 was what I was thinking of, in a fashion. Lower down my Parameter page, 32 tool offsets are available. However with the router having an ER collet, I end up zeroing each tool prior to a job. I may make a tool sensor this time for auto length setting. When I finally move to a mill, one of this lot will have sorted it out and I can just follow the pack....
Very different to the SMC4-4-16A16B, no direct gcode editing on this unit, so it's back to the PC for editing.
Joules:
My first motor test using an ancient stepper for testing. This is also the first test of these really cheap stepper drivers. What I hadn't realised was this controller doesn't have an enable line, I was going to use this to trigger my cooling fans for the stepper drivers. Never mind plan B & C will sort it out.
The jury is still out on this controller as I can't tweak the g-code directly at the unit, so still need to go back to the PC to mod the code. Unlike PK's controller, I do however like the USB flash drive on a short extension cable and easy operation of this unit. Once I have a box made up to house all the parts it will be time to wire up the CNC router and see if it's all been worth it.
The stepper drivers are rated for 24VDC and upto 3A per phase, and cost a measly £9.00 each, so they should be good for a small mill. Or NEMA23 3.1nm sized motor without issue, it can go higher but I would leave some headroom with these drivers.
PK:
The large screen is a plus on your unit too!
The 'tweak the code' function on mine gets old pretty quick if you have to do anything more than change a feed rate...
Mine does have an enable line, though it's wired through the DB25's on the back rather than the terminals for step and dir..
Could you use some combination of an M code triggered generic output and an extra switch block on the E-Stop circuit?
Joules:
Cheers PK, yeah I can use the coolant control for fan operation. I guess we are in early days with these new controllers, lots of little niggles, that I'm sure will get resolved over time with newer units. I can't fault it as is, for the price. Shame we don't have access to files that appear in the manual (userVar.set) and where we are on firmware updates. Some hacking and modding is in order :coffee: cos thats what we do....
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