Only used them on routers in the past so it remains to be seen.How are you finding these couplings? I put similar on my lathes turret but found there was too much compression in them even with the hardest inserts I could get. Then again the turret is a heavy lump to swing round 300mm dia by 55mm thick then all the VDI holders and tools, must come in around about 50kg plus.
I haven’t quizzed them yet but the current model supports absolute servos for full position feedback. I am presuming linear scales achieve the same.The SZGH don't really close the loop, they just use the scales for feedback of position and error tripping. At least the one I have anyway, they may have different ones out nowadays.
It may only be a few quid more for the extra axis/axes output functionality, but when I priced them, you had to pay more to get multi-axis interpolation.I was looking at the 5 axis 1000 series or this which is only a few quid more:
SZGH-CNC1500MDc Vertical CNC milling controller_深圳贯虹自动化有限公司
SZGH-CNC1500MDc Vertical CNC milling controller-深圳贯虹自动化有限公司-Overview: SZGH-CNC1500MDc is vertical CNC milling controller with USB and 2-6 axis , it supports X,Y,Z and A,B ,C and adopt modbus technology , and ARM, DSP , and FPGA , very high performance.www.szghauto.com
They are different controllers so likely different costings , I know my friend, who put an SZGH on his mill wasn't much more expensive than me for my 2 axis lathe one.It may only be a few quid more for the extra axis/axes output functionality, but when I priced them, you had to pay more to get multi-axis interpolation.
IIRC when I looked at one with a 4th axis option, the basic controller only had 2 axis interpolation, then you had to pay extra if you wanted full 3 or 4 axis interpolation.
If I could remember who I got a quote from, I'm sure I've still got the emails.
Actually, Just found the emails.
It was a CNCMakers. 4axis with 3 axis simultaneously in 2016 was $2285, and 4 axis with 4 axis simultaneously was $3048.
What ultimately put me off at the time for the mill, was the program memory limit. 57MB doesn't go very far if you're doing a lot of 3D milling.
Yes, you are right to point this out. I’ve noticed on some of the listings that a 5 axis might only list 2 axis interpolation.Prices of the common controllers have dropped a lot, but the key point I was making, was check how many axes can be driven simultaneously.
It's the kind of detail some sellers will not be open about.