# Error Message that Sled is not Keeping Up **URL:** \ **Category:** Troubleshooting\ **Created:** [November 19, 2018, 6:25pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765 "2018-11-19T18:25:24Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![Gero](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/gero/32/17487_2.png) [@Gero](https://forums.maslowcnc.com/u/Gero)\ **Post date:** [November 21, 2018, 4:24pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/22 "2018-11-21T16:24:56Z")
A few thoughts: > [@whitt3rx](#): > > a series of beeps - Is what I heard the first time with measuring motor distance in calibration, indicating a stalling motor. But this is with the TLE5206 shield I’m using. Never heard it with the PCB v1.2 you are using. Since the heat sink fell off you also should consider that the shield is fried as one the possibilities. ☹ - Unrelated (perhaps) to your problem, but strange is the “can’t keep up” in your log-file. > line:3697 → > Tool Change: Please insert tool 2 > Maslow Paused > \ > [PE:-0.01,0.00,127] > Sent: ~ > ok > ok > Sent: S10000 M3 > S10000 > M3 > ok > Sent: G54 > \ > [PE:24.60,11.61,127] > ALARM: The sled is not keeping up with its expected position and has halted. Click the ‘Stop’ button to clear the alarm. More information at: [Keeping Up · MaslowCNC/Firmware Wiki · GitHub](https://github.com/MaslowCNC/Firmware/wiki/Keeping-Up) > [Forward Calculating Position] > position loaded at: > 328.63 > 49.05 > G54 > Command G54 unsupported and ignored. > ok > \ > [PE:0.03,0.04,127] The sled has not moved at this point as it’s the header. However something seems to have triggered the Position Error to jump. - The gcode has a few things that would make me worry to run it my machine as it is. Was this done with the \>Maslow-post-processor\< in F360? Nothing that I can name to be an issue, but things that I do not know how thoroughly they have been test against FW/GC. – Many lines do not have a leading ‘G-command’. The last G is assumed I believe in most programs. – G3 commands do sometimes have I/J and sometimes only one of either – some moves have only X or only Y in the line – The first move is at Z0. Looks like you need to set a safety height in F360 as the Z0 can be found in the start of the gcode. Consider to do a ‘clean start’ by wiping the eeprom and renaming the GC.ini to exclude that something is jammed in soft- or firmware and load FW/GC 1.24 ---
**Author:** ![Sreenigne](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Sreenigne](https://forums.maslowcnc.com/u/Sreenigne)\ **Post date:** [November 21, 2018, 6:34pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/23 "2018-11-21T18:34:37Z")
This is so very similar to my problems. When my motor test fails (direction 1) it makes a series of beeps (sounds not sure if they are beeps), then moves to the other rotation direction. I am going to try and get a recording of it tonight also and upload to my posting. Any help you all can give to my situation would also be appreciated. @blurfl has been most helpful already in identifying issues with the firmware and my Gcode. > [@HELP ME Maslow Wizards](https://forums.maslowcnc.com/t/help-me-maslow-wizards/7767): > > I need help. My system has been running and stable for a while. I just completed the Meticulous Z upgrades and all was running well until two days ago. Not sure how to classify or summarize my problems more concise then the following. My system was running, in the middle of a program (cutting a simple circle near the middle/right side of the sheet about 12" from top of sheet), when it just stopped moving. I received the dreaded sled not keeping up warning. I am happy I was closely watching or … ---
**Author:** ![blurfl](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/blurfl/32/9_2.png) [@blurfl](https://forums.maslowcnc.com/u/blurfl)\ **Post date:** [November 21, 2018, 6:55pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/24 "2018-11-21T18:55:23Z")
> [@Sreenigne](#): > > When my motor test fails (direction 1) it makes a series of beeps (sounds not sure if they are beeps), then moves to the other rotation direction. A couple pieces of information that would help in troubleshooting this issue would be - What PowerControl board are you using - stock Maslow, BlueSmoke, other (which?) - What is the version number shown on the silkscreen of the board - what version of firmware - what is the setting of ‘Advanced/PWMfrequency’ It would be especially useful for troubleshooting to find a way to make it happen at will. This seems like something that could involve the PID routines, but it’s tough to see what could be causing it. ---
**Author:** ![Sreenigne](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Sreenigne](https://forums.maslowcnc.com/u/Sreenigne)\ **Post date:** [November 21, 2018, 7:30pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/25 "2018-11-21T19:30:09Z")
I will find out the board version # tonight. My system was in the last batch sold. I am using an original board from Maslow, and the most current software versions (1.24) ---
**Author:** ![blurfl](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/blurfl/32/9_2.png) [@blurfl](https://forums.maslowcnc.com/u/blurfl)\ **Post date:** [November 21, 2018, 7:45pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/26 "2018-11-21T19:45:42Z")
> [@Sreenigne](#): > > the last batch sold. I am using an original board from Maslow Thanks, that’s enough to let me know which parameters are bing used. That log file that you posted, moving in a 1" square and then testing the motors, ‘Fail motor test set 1 Log.txt’ - does that reliably fail the motor test, or even intermittently but often? ---
**Author:** ![Sreenigne](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Sreenigne](https://forums.maslowcnc.com/u/Sreenigne)\ **Post date:** [November 21, 2018, 8:44pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/27 "2018-11-21T20:44:42Z")
Almost always fails for both motors during the motor test. I did have a couple of times that the right motor passed the test in both directions. When I shut down GC and loaded again, it failed the next test. I tried but can’t upload video but it gives off multiple rapid beep sounds when it tries to move direction 1. ---
**Author:** ![dlang](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/dlang/32/859_2.png) [@dlang](https://forums.maslowcnc.com/u/dlang)\ **Post date:** [November 21, 2018, 8:00pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/28 "2018-11-21T20:00:55Z")
This sure sounds like changing the post-processor would be a good idea. These things are legal g-code to some systems, but not others. David Lang ---
**Author:** ![whitt3rx](https://avatars.discourse-cdn.com/v4/letter/w/a87d85/32.png) [@whitt3rx](https://forums.maslowcnc.com/u/whitt3rx)\ **Post date:** [November 22, 2018, 4:22am UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/29 "2018-11-22T04:22:03Z")
> [@Gero](#): > > The gcode has a few things that would make me worry to run it my machine as it is. > Was this done with the \>Maslow-post-processor\< in F360? No, it was generated with GRBL generic at best I can tell > [@Gero](#): > > G3 commands do sometimes have I/J and sometimes only one of either Can Maslow CNC Handle G3 commands? and I/J etc? > [@Gero](#): > > some moves have only X or only Y in the line I went back and found a post about a MaslowCNC.cps for Autodesk/Fusion 360…I finally figured out how to load that file into Fusion 360 and generated G-Code…I noticed that gcode file looks cleaner, but there are still lines that only have a Y or X and it does have G3 lines in it? [000125 zplate test MCNC Post.nc](https://forums.maslowcnc.com/uploads/maslowcnc/original/2X/b/b4ec0241aac9ba5413662e244f1b18838be0d921.nc) (69.2 KB) > [@dlang](#): > > This sure sounds like changing the post-processor would be a good idea. These > things are legal g-code to some systems, but not others. > > David Lang I am very interested in figuring out a better post processor to use…please see above quotes and trials, any information would greatly appreciated… > [@blurfl](#): > > A couple pieces of information that would help in troubleshooting this issue would be > > - What PowerControl board are you using - stock Maslow, BlueSmoke, other (which?) > - What is the version number shown on the silkscreen of the board > - what version of firmware I am using Stock Maslow v1.2b (I can attach picture if needed) I am currently using GC and Firmware 1.2 ![IMG_5706](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/d/d73be2db577fc1802f6469451771ff7300b5d1bb.jpeg) ![IMG_5707](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/8/8477fb9c3275eeb680d71a122693e5f3f7333400.jpeg) > [@blurfl](#): > > what is the setting of ‘Advanced/PWMfrequency where do I find this setting at? ---
**Author:** ![whitt3rx](https://avatars.discourse-cdn.com/v4/letter/w/a87d85/32.png) [@whitt3rx](https://forums.maslowcnc.com/u/whitt3rx)\ **Post date:** [November 22, 2018, 4:34am UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/30 "2018-11-22T04:34:24Z")
> [@Sreenigne](#): > > This is so very similar to my problems. Just curious what program do you use to generate G-Code? ---
**Author:** ![blurfl](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/blurfl/32/9_2.png) [@blurfl](https://forums.maslowcnc.com/u/blurfl)\ **Post date:** [November 22, 2018, 6:05am UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/31 "2018-11-22T06:05:30Z")
> [@whitt3rx](#): > > Can Maslow CNC Handle G3 commands? and I/J etc? Yes, the firmware handles G3, and all the absolute mode variations of I and J. If you update to v1.24, use [this corrected version.](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/a/ae48f58e66724216fd0110cfce2379103867b4ea.zip) The file ‘zplate test.nc’ linked above includes commands intended for a full 3D milling machine. There are arcs around the X axis for instance, and the fact that the file is written for that geometry could be the reason for the sled errors with that file. The later file ‘000125 zplate test MCNC Post.nc’ runs to completion without error in the simulator, so should cut properly. ---
**Author:** ![Sreenigne](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Sreenigne](https://forums.maslowcnc.com/u/Sreenigne)\ **Post date:** [November 22, 2018, 10:33am UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/32 "2018-11-22T10:33:31Z")
I use Estlcam for gcode. ---
**Author:** ![madgrizzle](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/madgrizzle/32/1372_2.png) [@madgrizzle](https://forums.maslowcnc.com/u/madgrizzle)\ **Post date:** [November 22, 2018, 2:14pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/33 "2018-11-22T14:14:16Z")
> [@whitt3rx](#): > > where do I find this setting at? Settings-\>advanced settings-\>PWM frequency for motor control. ---
**Author:** ![Gero](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/gero/32/17487_2.png) [@Gero](https://forums.maslowcnc.com/u/Gero)\ **Post date:** [November 22, 2018, 2:38pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/34 "2018-11-22T14:38:21Z")
$39=3 (PWM frequency value 1=39,000Hz, 2=4,100Hz, 3=490Hz) is in the log. The other settings also seem normal/default ---
**Author:** ![whitt3rx](https://avatars.discourse-cdn.com/v4/letter/w/a87d85/32.png) [@whitt3rx](https://forums.maslowcnc.com/u/whitt3rx)\ **Post date:** [November 22, 2018, 8:53pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/35 "2018-11-22T20:53:03Z")
> [@blurfl](#): > > Yes, the firmware handles G3, and all the absolute mode variations of I and J. If you update to v1.24, use [this corrected version.](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/a/ae48f58e66724216fd0110cfce2379103867b4ea.zip) I cut the above file and another one that I generated with maslowcnc post processor. I am happy to report that Maslow cut both parts to completion without any errors. However thr sled didn’t move smoothly through the cut. (Kind of jerky movement ) Wil the new firmware and ground control fix that movement issue? ---
**Author:** ![dlang](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/dlang/32/859_2.png) [@dlang](https://forums.maslowcnc.com/u/dlang)\ **Post date:** [November 22, 2018, 9:05pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/36 "2018-11-22T21:05:50Z")
can you post a video? there are lots of possible ‘jerky movement’ causes. Some may be firmware, some may be hardware David Lang ---
**Author:** ![whitt3rx](https://avatars.discourse-cdn.com/v4/letter/w/a87d85/32.png) [@whitt3rx](https://forums.maslowcnc.com/u/whitt3rx)\ **Post date:** [November 26, 2018, 12:06am UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/37 "2018-11-26T00:06:54Z")
Sorry for the delay getting back to the topic, I have had to work non stop this week, and then my girlfriend had a pretty serious injury to her knee…I did managed to get a video…but due to size it won’t let me upload to the forum…I am cutting a part now, and for some reason its not as jerky as before… I plan on updating the firmware and ground control this week…i almost hate to for some thing always goes wrong when i do… Thank you so much for your help and suggestion of post processor… ---
**Author:** ![Flaming\_WoodWorks](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/flaming_woodworks/32/14818_2.png) [@Flaming\_WoodWorks](https://forums.maslowcnc.com/u/Flaming_WoodWorks)\ **Post date:** [October 29, 2019, 3:39pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/38 "2019-10-29T15:39:36Z")
I am having similar issues. I’ve had my brand new Maslow for over one month and haven’t been able to cut a single path. Bad arduino: replaced. Figuring out a dozen settings never explained in one place on just how to start Ground Control: done. Resolving other error messages: done. Recalibrated automatically a couple times. Recalibrated manually once. And now, I’ve had all my motors pass their tests multiple times (including Z-Axis) and I still get this error the instant the Maslow starts to buzz - doesn’t even begin to cut. I’ve checked connections, I’ve followed a dozen tutorials and I’ve installed all of the latest software for MAC. I’ve slowed down cutting speed to 200 (half of that recommended for plywood) but the router hasn’t even touched the wood when this error pops up. What all would you need to know from me to know what’s wrong and what I need to do to get started? Any help would be grately appreciated. ![21%20AM](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/b/bd12ea886479d03f941f48e8ceeb8d5475e103f7.png) ---
**Author:** ![Flaming\_WoodWorks](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/flaming_woodworks/32/14818_2.png) [@Flaming\_WoodWorks](https://forums.maslowcnc.com/u/Flaming_WoodWorks)\ **Post date:** [October 29, 2019, 4:24pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/39 "2019-10-29T16:24:26Z")
Also, when I try to calibrate on ground control, the rotate CW or CCW buttons do nothing, but my gears do not appear to be perfectly in 12:00 position as suggested. ---
**Author:** ![madgrizzle](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/madgrizzle/32/1372_2.png) [@madgrizzle](https://forums.maslowcnc.com/u/madgrizzle)\ **Post date:** [October 29, 2019, 4:51pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/40 "2019-10-29T16:51:49Z")
You are able to move the sled by using the directional arrow buttons on the screen without the error popping up? ---
**Author:** ![Flaming\_WoodWorks](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/flaming_woodworks/32/14818_2.png) [@Flaming\_WoodWorks](https://forums.maslowcnc.com/u/Flaming_WoodWorks)\ **Post date:** [October 29, 2019, 5:14pm UTC](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765/41 "2019-10-29T17:14:25Z")
No. I was just successful in trying to recalibrate but the chain never got tight so I’m trying again. Before then, the sled itself never moved, only the motors buzzed. Thanks [Previous page](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765.md?page=1) [Next page](https://forums.maslowcnc.com/t/error-message-that-sled-is-not-keeping-up/7765.md?page=3)