Topics

1

PoKeys / 57U, Mach 3 - A Axis, How?

« on: February 10, 2018, 11:14:00 AM »

Hi,

The 57U shows connections for X Y and Z channels. I use X and Z for the lathe, the spare channel is Y. Is there a way to tell Pokeys / Mach 3 that this is A instead for a lathe turret?

Thanks

2

PoKeys / Proximity Limit Switches

« on: October 16, 2017, 03:42:44 AM »

Ive had a look through the 57U manual. Is it possible to connect up either PNP or NPN proximity switches as limits / homing?

If the 57U cannot do this, can the CNC board?

Thanks

3

PoKeys / Pokeys 57U - Spindle Speed Control

« on: October 09, 2017, 04:50:17 AM »

Hi,

Ive managed (after some struggling) to get my spindle to run. The issue I have however is that I seem to be limited to around 3.5V of reference voltage, irrespective of requesting full speed or not.

Not sure if its a config issue on my side or not.

How does the 57 USB board generate up to 10V with no external PSU? Can I somehow use the 10V terminal from the Chinese VFD if needed? I dont see a place to input this into the 57 U board.

Thanks

4

General Mach Discussion / Mach3 Multiple Probe inputs

« on: August 12, 2017, 08:36:13 AM »

I am using a CS Labs controller. How do I do multiple probe inputs?

I have a touch probe that runs as Normally Closed until the circuit is broken.

My height setter is using a simple 'make' circuit which connects 24V back into the input.

For the life of me, I cant see a logical way to allow both these to be connected at the same time, either using the same input circuit or more than 1, is it possible?

Thanks

5

CS-Lab / ATC Macro - How to Count Pulses?

« on: June 30, 2017, 08:12:00 AM »

So I have a my Denford using an IP-A. The toolchanger macro is basic but can be improved.

The Denford has either an NPN or PNP wired proximity sensor. The logic to work out which way to turn the ATC works but currently I use a 1 sec interval to assume 1 rev of the geared motor. It works but over time it gets out of sync. The best therefore is to count (or decrement) a number based on pulses. Any idea how I do that via a CS Labs input and VB?

Thanks

6

CS-Lab / IP-A and Linear Scales / Encoder not directly on motor - how?

« on: January 08, 2016, 06:43:46 AM »

Hi,

Sorry if the subject is confusing.

I assume that his is a similar setup to having a motor driving something mechanical and then using a '3rd party' measurement system to feedback to the IP-A. Linear scales is a good example of this.

In my case I have a DC motor, that takes -10 to +10V input. All good, IP-A, sorted. The DC motor then has Tach feedback to its own Drive.

Then, on the ballscrew pulley (not the motor), is a suitable encoder (5V TTL) that can give the IP-A unit feedback.

The pulleys are not the same size, therefore the ratio is not the same as the motor speed. The ratio is however fixed. The Encoder does 2000 PPR measurement.

Is it possible for the IP-A unit to be used in this situation? If so, how? Where do I configure the calibration or do I mess with the steps per mm count to make the maths work?

Many thanks.

7

CS-Lab / Isolation of Spindle Control - IP-A

« on: June 25, 2015, 05:26:11 PM »

Hi,

First post here, please be gentle :-)

I need to connect to a Denford Spindle Controller, spec sheet here:-

http://www.sprint-electric.com/products/400-800-1200

Mine is the 1200 model.

Does anyone know if the 0-10V can be connected directly to a CS Labs unit? Does it take care of the fact that the DC Drive is floating at something like 90V?

Thanks