# Latest **URL:** https://opensourceleg.discourse.group/latest.md [Latest](https://opensourceleg.discourse.group/latest.md) · [Categories](https://opensourceleg.discourse.group/categories.md) --- ## [Start Here: Introduce Yourself](https://opensourceleg.discourse.group/t/start-here-introduce-yourself/42)
**Author:** [@OSL\_Admin2](https://opensourceleg.discourse.group/u/OSL_Admin2)\ **Replies:** 15\ **Last updated:** [August 31, 2026, 4:11am UTC](https://opensourceleg.discourse.group/t/start-here-introduce-yourself/42 "2026-08-31T04:11:28Z")
This forum is a place for people who care about the Open-Source Leg ecosystem to connect, learn, and collaborate. Taking a few minutes to introduce yourself makes a big difference. It helps others recognize where your e… --- ## [Cooling solution](https://opensourceleg.discourse.group/t/cooling-solution/221)
**Author:** [@malizade](https://opensourceleg.discourse.group/u/malizade)\ **Replies:** 12\ **Last updated:** [September 19, 2026, 8:58am UTC](https://opensourceleg.discourse.group/t/cooling-solution/221 "2026-09-19T08:58:43Z")
Hi. I was wondering what cooling solution you use for the Raspberry Pi 5/CM5? When running my control code, CPU usage is between 70-80%, and the temperature is 80-86 C. The system flags indicate throttling due to reach… --- ## [Alternative bearings](https://opensourceleg.discourse.group/t/alternative-bearings/251)
**Author:** [@feldk066](https://opensourceleg.discourse.group/u/feldk066)\ **Replies:** 0\ **Last updated:** [September 4, 2026, 12:58pm UTC](https://opensourceleg.discourse.group/t/alternative-bearings/251 "2026-09-04T12:58:08Z")
Hello, We’re looking to find a couple replacement ball bearings as some of ours got damaged. Has anyone found cheaper alternatives than McMaster or Motion Industries to source these parts, and if so what your experienc… --- ## [We’d love to stay connected across our other channels!](https://opensourceleg.discourse.group/t/we-d-love-to-stay-connected-across-our-other-channels/245)
**Author:** [@OSL\_Admin](https://opensourceleg.discourse.group/u/OSL_Admin)\ **Replies:** 0\ **Last updated:** [August 20, 2026, 7:51pm UTC](https://opensourceleg.discourse.group/t/we-d-love-to-stay-connected-across-our-other-channels/245 "2026-08-20T19:51:39Z")
Stay connected with OSL beyond Discourse! Follow the Open-Source Leg on LinkedIn and Instagram, and feel free to share our pages with others in your lab or network who may be interested in the OSL. We’d love to keep gr… --- ## [OpenSim model of Open-Source Leg v2](https://opensourceleg.discourse.group/t/opensim-model-of-open-source-leg-v2/225)
**Author:** [@malizade](https://opensourceleg.discourse.group/u/malizade)\ **Replies:** 2\ **Last updated:** [August 19, 2026, 11:52pm UTC](https://opensourceleg.discourse.group/t/opensim-model-of-open-source-leg-v2/225 "2026-08-19T23:52:12Z")
Hi. In the June 8 community meeting, the presentation showed a model of an amputee with the OSLv2 in OpenSim. Is this model available? I think this could really benefit the research community using OpenSim, who want to… --- ## [OSL Community meeting](https://opensourceleg.discourse.group/t/osl-community-meeting/244)
**Author:** [@OSL\_Admin](https://opensourceleg.discourse.group/u/OSL_Admin)\ **Replies:** 0\ **Last updated:** [August 18, 2026, 5:33pm UTC](https://opensourceleg.discourse.group/t/osl-community-meeting/244 "2026-08-18T17:33:26Z")
Today, we welcomed Maxim Yudayev and Louis Flynn from KU Leuven and Vrije Universiteit Brussel to the Open-Source Leg Community Meeting. They shared their research on bringing multimodal capabilities to assistive device… --- ## [Next Open-Source Leg Community Meeting August 17](https://opensourceleg.discourse.group/t/next-open-source-leg-community-meeting-august-17/243)
**Author:** [@OSL\_Admin](https://opensourceleg.discourse.group/u/OSL_Admin)\ **Replies:** 1\ **Last updated:** [August 17, 2026, 2:23pm UTC](https://opensourceleg.discourse.group/t/next-open-source-leg-community-meeting-august-17/243 "2026-08-17T14:23:18Z")
We’re excited to welcome guest speakers Maxim Yudayev and Louis Flynn from KU Leuven and Vrije Universiteit Brussel to our next OSL community meeting! They’ll be sharing their research on bringing multimodal capabilitie… --- ## [Housing for AS5048B encoder](https://opensourceleg.discourse.group/t/housing-for-as5048b-encoder/242)
**Author:** [@malizade](https://opensourceleg.discourse.group/u/malizade)\ **Replies:** 4\ **Last updated:** [August 14, 2026, 7:08pm UTC](https://opensourceleg.discourse.group/t/housing-for-as5048b-encoder/242 "2026-08-14T19:08:12Z")
Hi. In our setup, the default output encoder mount is used for mounting the Dephy AK7452 encoder board. It is part p\_b0303\_encoderHousing in the assembly (shown in the photo for the knee joint). Because we’re plannin… --- ## [Right vs. left leg adjustments](https://opensourceleg.discourse.group/t/right-vs-left-leg-adjustments/241)
**Author:** [@malizade](https://opensourceleg.discourse.group/u/malizade)\ **Replies:** 1\ **Last updated:** [August 10, 2026, 2:53pm UTC](https://opensourceleg.discourse.group/t/right-vs-left-leg-adjustments/241 "2026-08-10T14:53:49Z")
Hi. By default (e.g., in the CAD), is the OSL assembled for the right leg? If so, I was wondering what adjustments are needed to make it biomechanically suitable for use on the left side. Thanks! --- ## [Old Battery Case File](https://opensourceleg.discourse.group/t/old-battery-case-file/240)
**Author:** [@jpalacio06](https://opensourceleg.discourse.group/u/jpalacio06)\ **Replies:** 2\ **Last updated:** [August 5, 2026, 5:21pm UTC](https://opensourceleg.discourse.group/t/old-battery-case-file/240 "2026-08-05T17:21:24Z")
Hi. I was looking for the model of the knee battery case and noticed there was a new model. Is the file for the old model available? --- ## [Community meeting presentation](https://opensourceleg.discourse.group/t/community-meeting-presentation/237)
**Author:** [@OSL\_Admin](https://opensourceleg.discourse.group/u/OSL_Admin)\ **Replies:** 0\ **Last updated:** [July 24, 2026, 8:59pm UTC](https://opensourceleg.discourse.group/t/community-meeting-presentation/237 "2026-07-24T20:59:29Z")
Last week, we welcomed our first guest speaker to the OSL Community Meeting. @tadeo.casiraghi from Universidad de San Andres in Buenos Aires, Argentina, presented his excellent ongoing work to expand the Open-Source Le… --- ## [July 20 OSL Community Meeting with Guest Speaker](https://opensourceleg.discourse.group/t/july-20-osl-community-meeting-with-guest-speaker/236)
**Author:** [@ItzelFer](https://opensourceleg.discourse.group/u/ItzelFer)\ **Replies:** 0\ **Last updated:** [July 13, 2026, 8:31pm UTC](https://opensourceleg.discourse.group/t/july-20-osl-community-meeting-with-guest-speaker/236 "2026-07-13T20:31:23Z")
Join our next monthly OSL Community Meeting on July 20th from 3–4 PM ET which can be joined via the video link in the calendar invite. Add to Calendar This meeting will feature our first guest speaker Tadeo Casiraghi … --- ## [Timing belt specs](https://opensourceleg.discourse.group/t/timing-belt-specs/234)
**Author:** [@cangelid](https://opensourceleg.discourse.group/u/cangelid)\ **Replies:** 2\ **Last updated:** [July 8, 2026, 7:55pm UTC](https://opensourceleg.discourse.group/t/timing-belt-specs/234 "2026-07-08T19:55:56Z")
Hi everyone, I’m looking to replace the timing belts on the OSL. When looking at the BOM for both the knee and ankle, I noticed there are two different codes listed: GT3-5mm-325mm-belt (5mm pitch, 325mm length) GT… --- ## [Experimental flat foot](https://opensourceleg.discourse.group/t/experimental-flat-foot/228)
**Author:** [@tadeo.casiraghi](https://opensourceleg.discourse.group/u/tadeo.casiraghi)\ **Replies:** 1\ **Last updated:** [July 8, 2026, 4:12pm UTC](https://opensourceleg.discourse.group/t/experimental-flat-foot/228 "2026-07-08T16:12:48Z")
Hello everyone, We’re currently working on building a local functional approximation of the Open Source Leg flat foot due to budget constraints. I’ve searched through the University of Michigan OSL website and repositor… --- ## [July 20 Community Meeting: Guest Speaker](https://opensourceleg.discourse.group/t/july-20-community-meeting-guest-speaker/231)
**Author:** [@OSL\_Admin2](https://opensourceleg.discourse.group/u/OSL_Admin2)\ **Replies:** 2\ **Last updated:** [July 7, 2026, 3:29pm UTC](https://opensourceleg.discourse.group/t/july-20-community-meeting-guest-speaker/231 "2026-07-07T15:29:32Z")
Our next OSL Community Meeting will be on July 20 from 3–4 PM (Eastern Time). We’ll also have a guest speaker joining us, more details coming soon as we get closer to the date. You can save the event to your calendar us… --- ## [I2tLimitException](https://opensourceleg.discourse.group/t/i2tlimitexception/202)
**Author:** [@malizade](https://opensourceleg.discourse.group/u/malizade)\ **Replies:** 8\ **Last updated:** [June 29, 2026, 12:26am UTC](https://opensourceleg.discourse.group/t/i2tlimitexception/202 "2026-06-29T00:26:05Z")
I have a simple loop where I read IMU, loadcell (through actpack), and actuator data and write to logs. I get these errors related to thermals curves, seemingly at random times. Example 1: \[2026-04-07 14:59:54,643\] IN… --- ## [Mechanical Placement of the Load Cell in OSL](https://opensourceleg.discourse.group/t/mechanical-placement-of-the-load-cell-in-osl/224)
**Author:** [@seasea](https://opensourceleg.discourse.group/u/seasea)\ **Replies:** 0\ **Last updated:** [June 15, 2026, 6:39am UTC](https://opensourceleg.discourse.group/t/mechanical-placement-of-the-load-cell-in-osl/224 "2026-06-15T06:39:11Z")
Hello OSL community :slight\_smile: I am trying to understand the load cell implementation in the Open Source Leg. Could you provide details about its exact mounting location within the system and explain why that specifi… --- ## [Unexpected output position readings](https://opensourceleg.discourse.group/t/unexpected-output-position-readings/222)
**Author:** [@malizade](https://opensourceleg.discourse.group/u/malizade)\ **Replies:** 3\ **Last updated:** [June 12, 2026, 7:51pm UTC](https://opensourceleg.discourse.group/t/unexpected-output-position-readings/222 "2026-06-12T19:51:29Z")
Hi. During a recent experiment, despite homing the joints at the start, the reported ankle output position routinely exceeded its RoM (e.g., reported measurement of -45 degrees, while the limit is -30 degrees). What co… --- ## [June 8 Community Meeting Recap](https://opensourceleg.discourse.group/t/june-8-community-meeting-recap/223)
**Author:** [@OSL\_Admin2](https://opensourceleg.discourse.group/u/OSL_Admin2)\ **Replies:** 0\ **Last updated:** [June 10, 2026, 7:17pm UTC](https://opensourceleg.discourse.group/t/june-8-community-meeting-recap/223 "2026-06-10T19:17:09Z")
Thanks to the 20+ people who joined our June 8 Community Meeting! It was great to see so many community members show up, ask questions, and help push the Open‑Source Leg forward. We’re already planning the next communi… --- ## [DAQ 'max output current' vs current consumption](https://opensourceleg.discourse.group/t/daq-max-output-current-vs-current-consumption/219)
**Author:** [@Axel](https://opensourceleg.discourse.group/u/Axel)\ **Replies:** 0\ **Last updated:** [June 3, 2026, 8:37pm UTC](https://opensourceleg.discourse.group/t/daq-max-output-current-vs-current-consumption/219 "2026-06-03T20:37:25Z")
Hello, I am estimating battery life for a system that uses your DAQ board. The DAQ specifications list a “Max output current” of 250 mA. For my power-budget calculations, I would like to inquire about the DAQ board’s c… --- ## [June 8 Community Meeting: Sim‑to‑Real](https://opensourceleg.discourse.group/t/june-8-community-meeting-sim-to-real/217)
**Author:** [@OSL\_Admin2](https://opensourceleg.discourse.group/u/OSL_Admin2)\ **Replies:** 3\ **Last updated:** [May 30, 2026, 2:06pm UTC](https://opensourceleg.discourse.group/t/june-8-community-meeting-sim-to-real/217 "2026-05-30T14:06:47Z")
Our next monthly OSL Community Meeting is on June 8 from 3–4 PM ET and can be joined via the video link in the calendar invite. Add to Calendar This meeting will feature Ellie Wilson and Varun Shetty presenting the… --- ## [Pylon design and Material selection](https://opensourceleg.discourse.group/t/pylon-design-and-material-selection/213)
**Author:** [@seasea](https://opensourceleg.discourse.group/u/seasea)\ **Replies:** 1\ **Last updated:** [May 15, 2026, 6:28pm UTC](https://opensourceleg.discourse.group/t/pylon-design-and-material-selection/213 "2026-05-15T18:28:00Z")
Hi OSL Community, I am trying to better understand the “pylon” design in this project. Could you explain how the pylon is atteched to the adjacent components (such as the socket, actuator, or foot structure) ? I would … --- ## [Electronics Presentation Now Public](https://opensourceleg.discourse.group/t/electronics-presentation-now-public/204)
**Author:** [@OSL\_Admin2](https://opensourceleg.discourse.group/u/OSL_Admin2)\ **Replies:** 3\ **Last updated:** [May 14, 2026, 7:31pm UTC](https://opensourceleg.discourse.group/t/electronics-presentation-now-public/204 "2026-05-14T19:31:05Z")
Hi OSL community, During yesterday’s community meeting, the team presented an overview of the electronics we’ve been working on. For anyone who wasn’t able to join or would like to review the material again, the presen… --- ## [Higher Soft real time Frequency](https://opensourceleg.discourse.group/t/higher-soft-real-time-frequency/205)
**Author:** [@Sani\_Hasan](https://opensourceleg.discourse.group/u/Sani_Hasan)\ **Replies:** 1\ **Last updated:** [May 9, 2026, 3:06pm UTC](https://opensourceleg.discourse.group/t/higher-soft-real-time-frequency/205 "2026-05-09T15:06:41Z")
Hey, I was wondering what is the Highest frequency I can do on the OSL without losing data, every example shows 200 Hz and runs get choppy and there is data drops at 500 Hz as other posts have indicated the highest I hav… --- ## [April Community Meeting | Open Q&A](https://opensourceleg.discourse.group/t/april-community-meeting-open-q-a/203)
**Author:** [@OSL\_Admin2](https://opensourceleg.discourse.group/u/OSL_Admin2)\ **Replies:** 0\ **Last updated:** [April 8, 2026, 2:39pm UTC](https://opensourceleg.discourse.group/t/april-community-meeting-open-q-a/203 "2026-04-08T14:39:51Z")
Hi OSL community, Our next Open-Source Leg community meeting will take place on Monday, April 13, from 3–4 PM EST. This session will include project updates, a look at what the team is currently working on, and an open… --- ## [Variflex variants or flat foot](https://opensourceleg.discourse.group/t/variflex-variants-or-flat-foot/201)
**Author:** [@tadeo.casiraghi](https://opensourceleg.discourse.group/u/tadeo.casiraghi)\ **Replies:** 0\ **Last updated:** [April 1, 2026, 7:27pm UTC](https://opensourceleg.discourse.group/t/variflex-variants-or-flat-foot/201 "2026-04-01T19:27:26Z")
Hi everyone, I’ve been looking into the Onshape design that uses the Össur Vari-Flex LP foot, and I had a few questions I’m hoping someone here might be able to clarify: What size of the Össur Vari-Flex LP foot is us… --- ## [Loadcell measurement spikes](https://opensourceleg.discourse.group/t/loadcell-measurement-spikes/196)
**Author:** [@malizade](https://opensourceleg.discourse.group/u/malizade)\ **Replies:** 3\ **Last updated:** [March 31, 2026, 5:18pm UTC](https://opensourceleg.discourse.group/t/loadcell-measurement-spikes/196 "2026-03-31T17:18:58Z")
Hi. The OSL is mounted on a test setup. I obtain the loadcell readings through the Dephy motor. In this test, I pushed the shank segment in three directions at the joint limit. The corresponding changes are clear in the… --- ## [5V DC Convertor for RPi 5](https://opensourceleg.discourse.group/t/5v-dc-convertor-for-rpi-5/190)
**Author:** [@malizade](https://opensourceleg.discourse.group/u/malizade)\ **Replies:** 5\ **Last updated:** [March 20, 2026, 9:00pm UTC](https://opensourceleg.discourse.group/t/5v-dc-convertor-for-rpi-5/190 "2026-03-20T21:00:01Z")
Hi. What DC convertor part do you recommend for coverting the battery output for RPi 5? Is this a good option? THN 30-4811WI https://www.digikey.com/short/h1p0bp42 There is also an adjustable version, but I’m not sur… --- ## [Dephy motors don’t track the commanded](https://opensourceleg.discourse.group/t/dephy-motors-don-t-track-the-commanded/197)
**Author:** [@porteparlevent](https://opensourceleg.discourse.group/u/porteparlevent)\ **Replies:** 0\ **Last updated:** [March 16, 2026, 2:01pm UTC](https://opensourceleg.discourse.group/t/dephy-motors-don-t-track-the-commanded/197 "2026-03-16T14:01:33Z")
Hi everyone, I am testing control with OSL. The issue I have is the measured torques don’t match the commanded torques with the Dephy motor in both loaded and unloaded condition. In the loaded condition, I tested a con… --- ## [Thanks for Joining Our Meeting](https://opensourceleg.discourse.group/t/thanks-for-joining-our-meeting/194)
**Author:** [@OSL\_Admin2](https://opensourceleg.discourse.group/u/OSL_Admin2)\ **Replies:** 0\ **Last updated:** [March 2, 2026, 9:18pm UTC](https://opensourceleg.discourse.group/t/thanks-for-joining-our-meeting/194 "2026-03-02T21:18:20Z")
Thank you to everyone who joined our Open-Source Leg project meeting. We appreciate you taking the time to hear updates, ask questions, and follow the project’s progress. Our next Open-Source Leg meeting will be on Apri… [Next page](https://opensourceleg.discourse.group/latest.md?page=1)