Messages

241

PoKeys / Re: 57E + cncaddon - DIR line is not working ?

« on: March 23, 2015, 08:29:08 AM »

Can you give some more information on MCA808 drivers? The link to the manual?

PoKeysCNCaddon outputs single-ended 5V signals. What kind of input stage do the drivers have (standard optocouplers?)?
Have you taken into the account that PoKeysCNCaddon board is galvanically isolated from PoKeys?

242

PoKeys / Re: 56U incorrect motions

« on: March 23, 2015, 01:04:43 AM »

Do you have any circuit between the PoKeys and your stepper drivers? If you have a differential (- and + signals) input at your driver, check that you have the correct polarity.
What firmware version do you have installed on your PoKeys device?

243

PoKeys / Re: A few question about Pokeys devices

« on: March 16, 2015, 12:35:47 AM »

Usually PoKeys input pins are scanned as fast as possible by Mach plugin, but it is really hard to define what the scan rate actually is - something between 50 and 500 Hz.
However, some PoKeys pins support 'Digital counter' option, which is capable of counting the signals with frequency up to a couple of 100 kHz.
The values of these, however, are not accessible from Mach3 directly, but can be routed through PoIL shared data using PoBlocks (make sure to use 'Digital counter' block from 'IO' section). Using PoBlocks, you can create a closed-loop control of the spindle directly with Mach3 only setting the reference value via PoIL shared data slots.

244

PoKeys / Re: A few question about Pokeys devices

« on: March 15, 2015, 04:49:25 AM »

PoKeys57E is using two twisted pairs of the ethernet cable, so the other two pairs can be used for other purposes (as for power supply in your case), just make sure that you don't apply any DC voltages to PoKeys ethernet connector (power supply pairs must be connected to power supply input of the PoKeys device).
We would suggest additional low-pass RC filter for the emergency stop button signal in this case directly onto PoKeys pins (e.g. 1k resistor and 100n capacitor).

245

PoKeys / Re: Pendant MPG moves backwards

« on: March 13, 2015, 01:20:29 AM »

Or you can just swap A and B signals coming from encoder to PoKeys device.

246

PoKeys / Re: A few question about Pokeys devices

« on: March 13, 2015, 01:19:34 AM »

Hi

The selection between USB and ethernet is mostly the users preference. Since PoKeys56U was not originally designed to handle high-levels of electrical noise (this is changing with new devices we are preparing), most choose ethernet version that proved to be very reliable also in such environments.
PoKeys57E is an upgrade to PoKeys56E. We are working on a new (series 57) firmware that is already available, but is limited to 57 series of PoKeys devices. This means that PoKeys56 series will get mostly bug fixes in the upgrades, while new features will be presented mostly in PoKeys57 series (because we hit the limits on how many features can be implemented into the 56 series).

And regarding your last question - yes, PoKeys, programmed using PoBlocks, can be used as a standalone controller.

Regards,
Matevž

247

PoKeys / Re: Pokeys and a Thermistor

« on: March 05, 2015, 04:26:14 AM »

Hi, Matthias

We are at the moment working on a release for PoBlocks and PoKeys57E firmware that would support floating point numbers. Release should be made available next week.

Regards,
Matevž

248

PoKeys / Re: monitor current and voltage used with pokeys

« on: February 18, 2015, 11:52:22 AM »

I would strongly suggest to avoid measuring the AC voltage directly. The current is another story - there is a lot of galvanically isolated current sensors that can be directly connected to PoKeys's analog input. ACS712-based current meter would only require a simple voltage divider to lower the voltage from 5V to 3.3V that PoKeys is using.

249

PoKeys / Re: pokeys+cncaddon when Estop is pressed motors are feed

« on: February 16, 2015, 12:22:14 AM »

Hi, Claudio

As we replied to your question on our support e-mail, let us know of which PoKeys firmware version are you running? The bug should have been fixed in of the updates a while ago.

Regards,
Matevž

250

PoKeys / Re: Wrong Direction Sending G-Gode, Jogging and homing works fine

« on: January 25, 2015, 01:26:18 AM »

Unfortunately, this looks to be Mach3 issue.