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by Gert van Loo
Wed Dec 12, 2018 8:16 am
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

The simplest solution would be to use VNC which, luckily for you, comes ready-packed with the Raspberry-Pi.
by Gert van Loo
Wed Dec 05, 2018 9:21 am
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

Your question is somewhat confusing. You talk about a timer start & stop but then mention that it "calculates the time interval between this? " which is not what a timer function does. You might have a look at section 7.25.2 of the manual Revision 2.8. There is an signal called 'attention' which can...
by Gert van Loo
Tue Dec 04, 2018 1:00 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

No, you can't do half or micro stepping. For that I would have to make major changes to the current software. As the sales of the product has reached its end-phase there is no return in that for me.
by Gert van Loo
Tue Nov 06, 2018 4:08 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

The J3 pinout can be found in the GUI manual page 10. https://www.gertbot.com/gbdownload/man/Gertbot_GUI.pdf Alternative is to start the GUI and after connecting press the 'board' button. Example of using the inputs with Python can be found in the python_2.8a.tgz archive in the test program: test_dr...
by Gert van Loo
Fri Jun 08, 2018 12:54 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

I am working on an updated manual. There is a delay because I am switching from word to open-office and there are compatibility issues. I have to do a lot of tedious work and I can stand only so many hours a week with elevated blood pressure! The new manual states that you should just set the speed ...
by Gert van Loo
Wed May 30, 2018 1:56 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

I mentioned the GUI only to get you started and test the HW. You are probably going to need it anyway to find the servo 'trim' values. Being used to accuracies of 1% or even 0.1% I was some what surprised to see that the servo position deviations where in the order of 30% As of a few minutes ago the...
by Gert van Loo
Wed May 30, 2018 12:25 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

The latest manual (version 2.8) has a chapter (10) dedicated to servo control. It also states that there are no driver routines yet. I apologize for that but due to circumstances, I do not have access, nor had access for the last year, to my electronics equipment. The firmware running on the gertbot...
by Gert van Loo
Wed May 30, 2018 12:25 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

The latest manual (version 2.8) has a chapter (10) dedicated to servo control. It also states that there are no driver routines yet. I apologize for that but due to circumstances, I do not have access, nor had access for the last year, to my electronics equipment. The firmware running on the gertbo...
by Gert van Loo
Wed May 30, 2018 12:24 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

The latest manual (version 2.8) has a chapter (10) dedicated to servo control. It also states that there are no driver routines yet. I apologize for that but due to circumstances, I do not have access, nor had access for the last year, to my electronics equipment. The firmware running on the gertbot...
by Gert van Loo
Tue May 01, 2018 7:38 am
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

This chip has built-in freewheel diodes which take care of the turn-off voltage spikes. Otherwise it would die at the first use! There is no reason to add any more protection from your side. To switch the current-stop off you send the command once: set_short(board,channel,GB_SHORT_NONE); I have not ...
by Gert van Loo
Mon Apr 30, 2018 2:41 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

The problem is that the hardware and CPU are very, very fast. Even a very short current spike may trigger the stop-mode. Command <0x21 <id> 0x00> will prevent that. Thus 0x21 0x00 0x00 for channel 0, 0x21 0x01 0x00 for channel 1 etc. It does NOT disable the short circuit protection. That is always e...
by Gert van Loo
Mon Apr 30, 2018 11:55 am
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

Peter, I have to work through your text in detail and think about what may be happening. I have thus far, (keep fingers crossed) not been able to blow up a board other then by a too high voltage on the motor connector. I have run test with directly shorted outputs. The ramp-up and will only prevent ...
by Gert van Loo
Tue Apr 24, 2018 7:57 am
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Gertbot sales in the US

featherfeet:
I have contacted a Dutch company who still have stock: https://www.kiwi-electronics.nl/
They tell me they ship world wide.
by Gert van Loo
Fri Apr 20, 2018 3:16 pm
Forum: HATs and other add-ons
Topic: Gertbot deceased?
Replies: 2
Views: 600

Re: Gertbot deceased?

With no heartbeat they are dead. I have not seen this before. Can you tell me how they where stored? I still have lots of the first batch here and the are still working fine. But then they are still in the original box in bag and EMC foam. I have done a re-flashing service at shipping cost for someb...
by Gert van Loo
Thu Apr 19, 2018 2:10 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

Most likely your serial port is not enabled on the Pi3.
See https://www.gertbot.com/pi3.html for how to get your serial port working.
by Gert van Loo
Thu Apr 19, 2018 1:07 pm
Forum: HATs and other add-ons
Topic: libstdc++.so.6: version `CXXABI_1.3.9' not found (required by ./gertbot)
Replies: 4
Views: 1507

Re: libstdc++.so.6: version `CXXABI_1.3.9' not found (required by ./gertbot)

First: You have opened a thread but there is already a thread, with questions and answers, specific to the get bot https://www.raspberrypi.org/forums/viewtopic.php?f=42&t=101760#p1302622. Which version are you using? One of the problems with the Jessie image is that the QT4 libraries are no longer i...
by Gert van Loo
Sat Apr 14, 2018 3:56 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

I just did the following: Downloaded the GUI 2.8 Downloaded the gb_upload program. Connected a gertbot version 2.7 Uploaded version 2.8 to the board. Started the GUI. Selected Step Gray Pwr. Kept the Frequency at 100. Set the ramp start/stop as 1 Set the ramp speed as 0.1 Set 10000 steps. Start the ...
by Gert van Loo
Sat Apr 14, 2018 10:47 am
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

RS have been the only one still buying from me. You should have a look at their stock. Manufacturing is done in batches of 2500. As sales have been declining, it is not economic viable for me to start a new batch. (I sold ~400 last year). I still have a few hundred in stock but I am not set-up to e....
by Gert van Loo
Sat Apr 07, 2018 8:29 pm
Forum: Nederlands
Topic: raspberry pi verbinden via uart naar arduino
Replies: 1
Views: 779

Re: raspberry pi verbinden via uart naar arduino

De UART kun je openen, lezen en schrijven als een file . (/dev/ttyAMA0).

Voor het echte verbinden moet je oppassen want de Arduino is 5V en de Pi is 3.3 Volt.
Google "connect raspberry pi to arduino serial" geeft ~1.000.000 resultaten.
by Gert van Loo
Tue Apr 03, 2018 8:24 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

It will take some time as I have some other obligations.

As to reading the end-stop switches, that is already supported.
They are just normal inputs thus a 'READ input' command will give you that information.
You can try it with the GUI by first switching to 'board' mode. On the LHS is a Read button.
by Gert van Loo
Tue Apr 03, 2018 7:55 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

If you connect a solenoid between A1 and A2 it will drive it. The same for B1/B2, C1/C2, D1/D2. But there is no on/off software for that, so you have to use DC motor mode. Either forward or backwards will activate the solenoid. But the board has eight half bridges. So it could drive 8 single ended d...
by Gert van Loo
Sun Apr 01, 2018 7:00 pm
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

My apologies. There was a typo in the file which made that the link was wrong.
I thought that I had tested downloading each file but I must have missed that one.
It is now in place with more information how to get it running and
how to use a better font.
by Gert van Loo
Fri Mar 30, 2018 9:34 am
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

Durian,
I don't think that is a good idea. You are likely to blow up your motor.
Use 8V as that is the minimum voltage the gertbot can run at.
Then add series resistors of 2.7 Ohm, ~3Watt.
by Gert van Loo
Fri Mar 30, 2018 4:05 am
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

For stepper motors version 2.8 only offer ramping extra.
But there are some other non-stepper motor features like de-bounce filters on the end switches.
by Gert van Loo
Tue Mar 13, 2018 8:48 am
Forum: HATs and other add-ons
Topic: Gertbot
Replies: 140
Views: 42403

Re: Gertbot

There are two archives with complete source code which you can download which use the gertbot with QT: Gertbot Debug GUI and DCC example gui. The latter is the smallest. Both are written for QT4.8 and I understand the Pi now has QT5. But the code how to interface with the UART is independent from th...

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