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Minimad, Angel-tech, Moray,

As a kind of postscript....it's been a few months, but I've been thinking about your comments around grounding and high voltages etc. from the Sprint board. My mill still seems to work fine and I haven't had any shocks yet (at lease electric ones!) but even so....I want ...

Thanks Moray.

Measured voltage between earth and 0v sprint input with machine running...measures at a few mV. Between earth and the 0-10v line I get a few volts (as you'd expect).

I notice that the stepper board is earthed (not by me) I wonder if this is connected to the gnd plane on that board ...

Hi Moray,

I don't use my mill commercially, but I'm am concerned that it is safe. Concerned by your post, I went and made some measurements. with the machine off and isolated I measured the resistance between 0v and earth and it is effectively zero...so they must be connected somewhere. This is not ...

Hi Minimad,

Can you post some photos and /or a circuit diagram of what you have done? Also tell us a little more about what you are trying to achieve and how you are going about it...that should help us to help you more easily.

Cheers
Alastair

Hi Minimad,

When you say in your original post " it trips a fuse in my garage" - do you mean an RCD keeps trips? If so, this sounds like a possible wiring error on the high-voltage side of the spindle motor wiring, or maybe an issue with the way you have something earthed.

I did have problems ...

'tunes,

Sounds like you're nearly there!

From what I see of the eBay ad for your BoB it doesn't appear to offer a 0-10v output - I couldn't face ploughing through the full instructions though.

This means you will need to find a way to convert PWM to 0-10v. As mentioned in my previous reply, you ...

Hi Tunes,

You need a 0-10v output from somewhere to drive the spindle drive card to get the variable speed. You don't mention what type of "motion card"/breakout board you have - often these have a 0-10v output on them which you would connect to the spindle drive where the [un-numbered] red and ...

Andy,

Sorry for the slow response - for some reason I don't get email notifications when there is a change to this thread, despite subscribing by email.

My reasons for taking the power from the stepper controller board are:
a) Both 5v and 12v are there anyway and I preferred the control box to be ...

Hi All,

Many thanks for your thoughts and replies. It took a long time (not a complaint) between posting my original questions and there being any kind of response here so I continued reading and went ahead anyway based on what I'd learned from around the web.

As Pete noticed, I have access to a ...

So, I’ve been wanting a CNC mill for ages and a few weeks ago managed to get hold of a Novamill for what I think and hope was a sensible price. The machine appears to be in good nick but obviously hasn’t been used for a few years. It is complete with control box, cables and training panel but does ...