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single flute upcut works great, make sure you stick the back down well over cut or will lift.first one I cut lead shot up cutter ripped out and broke cutter 2nd try after sticking down worked a...

I think it would be worth a try to use an engraving tool with a small included angle and run it as a program, but leave the spindle switched off. You can score the leadto whatever depth you want,...

Magic Videos, and great Job. It occurred to me the videos would make a great advertisement for Strike-Cnc if they start up again as they have no Video Titles on them :hysterical: Great Job.. ...

You can normally cut that thickness with a sharp knife or tough scissors can't you? If mills don't work you could try a drag knife, it might break a stanley blade but you could always grind an edge...

Never cut any but I would be cutting with slot cutter full depth to avoid clogging cutter. Single flute or certainly No more than 2 flutes.

Do a practice run around 800mm/min 10K rpm and adjust...

Given that they're NC when not activated, if you want to connect them through a single pin, then you'll need some way to invert the signal.

There are various options, however the one that involves...

If they have active (i.e. TTL level) outputs, then they won't like being connected up. Possible work arounds could be some kind of OR gate, or mini relays.

If they have an Open Collector option,...

Either way of wiring in the relay would work. Your first diagram switched the high (positive) side, and your second switched the low (negative/gnd) side.

Only thing that threw me was the markings...

Ok I think this is how it would be wired but you better confirm that with the gurus..

7893

Sorry its crude but ive just got home from work.. I think you will understand it.

Rick

The alarm terminals don't output any power. It's an open collector output capable of switching 100mA at 30V.

So you still need a relay as per John's suggestion to connect into to the Estop...

In which case feed the E Stop circuit through a set of relay NC contacts and the alarm + and - to that relay coil.

Connect all 3 drivers to the same coil and then it doesn't matter which one...

Loose the brown link wire to alarm.
you are feeding it V+ from this and then to ground. when it triggers it will be a dead short.
You want e stop to go to one alarm terminal then to ground.
...

Right, so you have said let:
acceleration =1000mm/s^2=1m/s^2
velocity = 10m/min = 10/60= 0.167 m/s (not actually required for the initial calculation)
mass = 80kg

It's just newtons 2nd law, so...

Could've told me that an hour ago, :wink::

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Actually it wasn't so bad with the big magnet, but if you don't have a suitable magnet then your way is a lot cheaper. It's a...

I guess we have all done that! First make a cardboard tube, just roll up thin card, to go over the machining on the screw but will fit in the nut with the balls in. I used the magnets but found that...

I've done this a couple of times...
Ideally you want a tube which is the pitch diameter of the ballnut minus the diameter of one ball, so if you imagine the nut fully populated it would just slide...

Yes done that, balls everwhere.
Give the balls and nut a good clean before you start. Count the ball and seperate them into two equal amounts so that you get the same amount in each chain. Hoefully...

Hi Shinobiwan,
Do you have one of those cheap 16-05 China ballscrews it is possible to reload the ballscrew. I have done it a few times to load oversize balls to reduce backlash.

Leave those...

I just feel that I have to say that I am stunned at the response to this thread. I bet we have all bought something or wanted to buy it and sung its virtues only to find that it really was a heap of...

Mine hisn't grounded and it doesn't need to be.! The VFD takes care of the EARTH side just make sure the VFD is EARTHED and it will be fine.
You could if you wanted belt and braces safety introduce...

Every time you increase microsteps you loose torque.
There is no advantage in going above 8 and you only have to do the setup once.

Or, switch that axis to 16 microsteps and have 'em all the same.

Common microstepping practice is 8.

Steps per unit, you need to calculate using whatever units you're using (normally MM or Inch), pitch of ballscrew, number of steps per motor revolution, and...

If you want a critical speed calculator, i use this one.
http://www.nookindustries.com/ball/BallCalculators.cfm

Agree with what m_c said. You can find the formula he suggested by searching for screw critical speed on google, but assuming the ballscrew is 350mm long the critical speed is 3500rpm - so...