Search found 19 matches

by evangifford
Wed Jul 15, 2020 1:21 am
Forum: General Discussion
Topic: HM1 Home Switch triggered by motor overcurrent?
Replies: 8
Views: 5572

Re: HM1 Home Switch triggered by motor overcurrent?

Yes, I confirm this is the behavior I expected and was seeing.

So S3 configured as Home (User) can be triggered both by a micro-switch contact (desired behavior) and by a sudden current draw from the motor (unexpected, undesired).

The work-around is a low-resistance pull-up to 5V - I used 1K
by evangifford
Mon Jul 13, 2020 8:17 am
Forum: General Discussion
Topic: HM1 Home Switch triggered by motor overcurrent?
Replies: 8
Views: 5572

Re: HM1 Home Switch triggered by motor overcurrent?

Ok, I was back in the workshop today - I tried the three scenarios above, 1K, 4K7 and No (so, 25K internal) pull-ups - the results are good. Using Motion Studio, I set the S3 mode to Home (User), Inverted check box not checked. I moved the motor toward the reverse limit switch at pwm 255 and manuall...
by evangifford
Mon Jul 13, 2020 3:28 am
Forum: General Discussion
Topic: HM1 Home Switch triggered by motor overcurrent?
Replies: 8
Views: 5572

Re: HM1 Home Switch triggered by motor overcurrent?

With no switch connected, here's what I got measuring S3 with different pull-ups Using 4.7K external Pull-Up: S3 Motor 1 Home(User) inverted? no: 2.833V S3 Motor 1 Home(User) inverted? yes: 2.754V Using 1k external Pull-Up: S3 Motor 1 Home(User) inverted? no: 3.377V S3 Motor 1 Home(User) inverted? y...
by evangifford
Wed Jul 01, 2020 11:22 pm
Forum: General Discussion
Topic: HM1 Home Switch triggered by motor overcurrent?
Replies: 8
Views: 5572

Re: HM1 Home Switch triggered by motor overcurrent?

Thanks for your quick reply! The battery is a rather hefty custom 4S, 30aH 21700 pack so even at 1C and a few other things running off it, I think there is plenty of overhead - as you suggested I'll measure the dip under load to verify my assumption. The pin does seem to have a pull-down. I haven't ...
by evangifford
Wed Jul 01, 2020 7:32 am
Forum: General Discussion
Topic: HM1 Home Switch triggered by motor overcurrent?
Replies: 8
Views: 5572

HM1 Home Switch triggered by motor overcurrent?

Hello. I have a linear application with a SOLO with the 0 position indexed by a micro-switch. When I drive the motor in reverse toward the micro-switch in Motion Studio PWM control with the motor under no load, everything works as expected - the micro-switch is hit, S3 goes to 0V and HM1 is triggere...
by evangifford
Wed Jun 17, 2020 9:15 am
Forum: General Discussion
Topic: SOLO no longer detected by Windows
Replies: 18
Views: 9972

Re: SOLO no longer detected by Windows

Well, it's a great product - I'm very happy with it and have already recommended the SOLO to others. MIT proved it could be used for a use case you may have never imagined when making Rovers. Since they also used a Power Supply - I'm sure you explained to them the "Max Battery Voltage" - d...
by evangifford
Tue Jun 16, 2020 11:44 am
Forum: General Discussion
Topic: Motion Studio - Auto-Tune PID crashes app
Replies: 8
Views: 5965

Re: Motion Studio - Auto-Tune PID crashes app

Yes, you're right - the encoder channels needed to be reversed in my application for it to complete. I didn't realize the PID would be sensitive to the direction - it seems like it would be able to figure that out based on the increment/decrementing of the encoder. It's not great that this crashes t...
by evangifford
Tue Jun 16, 2020 11:26 am
Forum: General Discussion
Topic: SOLO no longer detected by Windows
Replies: 18
Views: 9972

Re: SOLO no longer detected by Windows

Ok, I do see that information in the manual now - This is obviously my first time using a RoboClaw product, and I'm in a rush - I mistakenly assumed this value pertained to batteries only - since it's labeled "Main Battery Voltage" in Motion Studio - like it was used to detect the battery ...
by evangifford
Tue Jun 16, 2020 12:38 am
Forum: General Discussion
Topic: SOLO no longer detected by Windows
Replies: 18
Views: 9972

Re: SOLO no longer detected by Windows

Looking at the BOM for the MIT E-Vent (Using a SOLO 30A) - they are using a switching power supply (LRS-150) - but I don't see any shunt/clamp circuit? How do they ensure reliability of this system without using any of the above strategies to protect the SOLO and power supply from voltage spikes - s...
by evangifford
Tue Jun 16, 2020 12:20 am
Forum: General Discussion
Topic: SOLO no longer detected by Windows
Replies: 18
Views: 9972

Re: SOLO no longer detected by Windows

Also, a question - why does the SOLO not automatically go into braking mode to protect itself in case the voltage is high enough to damage the internal electronics? If that would interfere with normal energy regeneration, could this be added as an option in the firmware - a "soft shunt protecti...