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Messages - JohnHaine

191
General Mach Discussion / Re: Mach 3 USB version
« on: July 31, 2022, 01:46:14 AM »
Cable not able through ring...

192
General Mach Discussion / Re: Fine Tuning the Spindle
« on: July 31, 2022, 01:38:18 AM »
Right!  Glad it's sorted.

193
General Mach Discussion / Re: Fine Tuning the Spindle
« on: July 30, 2022, 12:25:47 PM »
I found a KBIC schematic on the web and I'm not surprised at what you have found, those terminals will have very limited current supply capacity.  I can't understand why it needs 30mA from the external supply, I designed a circuit which took virtually no current at all.  Hey-ho.

194
General Mach Discussion / Re: Mach 3 USB version
« on: July 30, 2022, 12:22:10 PM »
Well that was my experience anyway.  If you do get noise problems the first thing is to use high quality USB cables with decent shields, and often you can improve things by wrapping a couple of turns of the able through a ferrite ring.  But as I said, I've not had any problems and I haven't taken any special precautions.

195
General Mach Discussion / Re: mach3 xhc WHB04B mini lathe
« on: July 30, 2022, 09:10:21 AM »
Lathe set to diameter mode but the pendant either isn't set or doesn't recognise it.  Mach 3 should say diameter mode under the dros.  Just ignore the pendant.

196
General Mach Discussion / Re: Fine Tuning the Spindle
« on: July 30, 2022, 02:54:35 AM »
Do you mean that you had 11.5v on the kbic before connecting and 3.5v when connected to the c11g? That would be consistent with the pwm circuit on the c11g requiring more current than the kbic can deliver.  Your circuit should work (though I haven't checked the pin assignments) provided the isolation on the 12v supply is OK, but since it has to allow for the negative output to be grounded it should be.  The key factor in isolating a psu is having a transformer inside, either a chunky mains one or a tiny high frequency one in a modern switched mode type.

197
General Mach Discussion / Re: Mach 3 USB version
« on: July 30, 2022, 02:23:39 AM »
Your local time is 5 hours behind uk.

I have one uc100 on about a 1 metre cable to the mill the other about 2 metres to the lathe.  Lathe has vfd drive, mill uses a kbe dc drive.  No problems with noise.

198
General Mach Discussion / Re: Mach 3 USB version
« on: July 29, 2022, 05:32:06 PM »
http://shop.cncdrive.com/  ??

It looks like you must be on US east coast?  I'm sure they have agents in the US even if they can't ship direct.

199
General Mach Discussion / Re: Mach 3 USB version
« on: July 29, 2022, 05:01:58 PM »
Happy to help. If you go this route make sure you get the genuine uc100 as there are clones that don't work very well with no support.  There is a good cncdrive support forum and I've found the company very responsive.
http://cncdrive.com/UC100.html

200
General Mach Discussion / Re: Fine Tuning the Spindle
« on: July 29, 2022, 03:50:10 PM »
Be cautious!  The KBIC is not grounded and it floats at about half mains voltage.  That's why the C11G pwm circuit is opto isolated and gets its supply from the KBIC.  So is the 12v PSU fully isolated from the mains?