New CNC Mill on the horizon

**Lee Roberts** · 12-03-2015

I've got a load of new old stock of screened 8, 6 and 4 core alarm cable if anyone needs any, it's worth about £15 a drum on the bay but I can't be asked with that, happy to help anyone out if they would like some.

Should be good for limits and so on?

.Me

**fvfdrums** · 12-03-2015

right I have got the belt! well its ordered, cost a small fortune mind so I hope it won't break!

Yet another question. I am just fitting up the limit switches on the machine and then the homing.

I have the large industrial style limit switches with a roller that can be activated either cw/cww which I am going to have activated by a ramp rather than bumping into it. However the homing switches are proximity. how and where do people generally fit these?

**JAZZCNC** · 12-03-2015

Originally Posted by fvfdrums

I have the large industrial style limit switches with a roller that can be activated either cw/cww which I am going to have activated by a ramp rather than bumping into it. However the homing switches are proximity. how and where do people generally fit these?

This going to sound obvious when I say it.!! . . . . Where ever you want HOME to be.!!

Generally you'll position them so they follow Cartasian coordinates ie Bottom left corner and in front of the limits but they can be any where you like. They are really only used as a Fixed referance point to define MACHINE coordinate Zero which you then use to Reference WORK coordinates.

One problem with NOT putting them in corner is that depending on which side of the switch axis is parked it could miss the switch. This is why generally you put them in a corner and set controller up so it always HOMES negative or Positive so can't miss the switch.

**fvfdrums** · 13-03-2015

It was more how they were positioned however I think I have figured the best solution(s) for this machine based on keeping them out of the way of the "crap" thats likely to be thrown up at them if mounted lower down.

Managed to get them all as travelling switches as I had hoped so should make for less wires everywhere.

It makes sense you would home at the front I suppose, I dont know why but I thought to start with if you were standing at the front it would be back of the machine left hand side, but I suppose thats due to the way my machine is positioned. Although it does still give good access to tool changing etc hmmm I will have a think.

Thanks though Dean

**JAZZCNC** · 13-03-2015

Originally Posted by fvfdrums

It makes sense you would home at the front I suppose, I dont know why but I thought to start with if you were standing at the front it would be back of the machine left hand side, but I suppose thats due to the way my machine is positioned. Although it does still give good access to tool changing etc hmmm I will have a think.

Depends really where you stand at the machine. Often routers are viewed from the side in which case viewing from the front it would be back left corner and long axis woul'd be X axis. Viewing from the side that would still be bottom left corner.!

If you stand in front of machine then you'd call across the gantry the X axis and long Axis would be Y. Again this would follow typical drawing coordinates.

But like I say doesn't have to be and some don't have it this way. I prefer so home is in bottom left corner and all moves in MACHINE coordiantes are positive. So Homing is always traveling towards negative.

**fvfdrums** · 15-03-2015

One of many things that's arrived this week. Exceptionally well made and presented. If it operates even half as good as it looks (which I have no doubt it will) I'll be very happy!

**njhussey** · 15-03-2015

I got a couple of those in the last couple of weeks (one for my router and one for the planned mill conversion) they are nicely packed and presented, im just reading through the instruction manual at the moment...

**fvfdrums** · 15-03-2015

Yeah I am pleased,

Have this week set aside to finish up the general mechanics of the machine (to an basic operating stage) then fri-sun to wire up the panel and get it all working so fingers crossed

**njhussey** · 15-03-2015

A similar timetable to myself except mine will just be done in the week, I've only got a couple of bits to do mechanically and then the rest is all electrical...

**fvfdrums** · 16-03-2015

Belt arrived today.....

......wrong size. Anyway after a long time on the phone and knowing they were not really interested in helping out "small orders" I decided to just move the x axis motor to accommodate it. Turns out it's worked out quite well but what a pain this belt had been! Anyway it seems to be fine now.

Most of the electrical stuff has arrived now only waiting on a few bits and the e chain.

Should have moved on a lot by this time next week fingers crossed.