tag:blogger.com,1999:blog-247130680149573043.post2718587069582064432..comments2024-03-21T02:26:58.014-07:00Comments on Don's Laser Things: SKR to K40 integrationDonKJrhttp://www.blogger.com/profile/14497402158163702122noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-247130680149573043.post-63759282331585553012021-05-05T20:01:42.204-07:002021-05-05T20:01:42.204-07:00Every is working *PERFECTLY* I solved the 2:1 dis...Every is working *PERFECTLY* I solved the 2:1 distance issue...it was two-fold. The larger of the two problems was the steppers were wired incorrectly; however, worked as directed with ~160 steps/mm. When I changed to 320 or 80 both motors acted erratically (noisy) but in different mannerisms. The SKR BTT 1.4T stepper pin-out is 2B,2A,1A,1B which if you convert to stepper language is B-,B,A,A-. If you use factory wiring for the version of K40 (no middle man board and no ribbon cable) the wiring is Red, Blue, White, Yellow for a 17HM3448N-15AD(-Z) (See Don's guide: http://donsthings.blogspot.com/2016/06/k40-s-motors.html). The X stepper was wired Red, Blue, White, Yellow to 2B,2A,1A,1B and the Y stepper was White, Yellow, Blue, Red to 2B,2A,1A,1B. Once I switched them both to Yellow, White, Red, Blue to 2B,2A,1A,1B and changed the steps/mm to 80 (instead of 160), the steppers moved in a 1:1 ratio...I think this means I am using 1/8 microstepping instead of 1/16. I might investigate my TMC 2130 driver, but unlikely since everything is working so well. If it ain't broke, don't fix it.Snuffy39https://www.blogger.com/profile/05421439234583915110noreply@blogger.comtag:blogger.com,1999:blog-247130680149573043.post-74422332637335960022021-05-05T19:16:13.472-07:002021-05-05T19:16:13.472-07:00Ceramic resistor removed - no issues on the HY-T60...Ceramic resistor removed - no issues on the HY-T60.Snuffy39https://www.blogger.com/profile/05421439234583915110noreply@blogger.comtag:blogger.com,1999:blog-247130680149573043.post-45388327017516528852021-05-05T19:15:19.114-07:002021-05-05T19:15:19.114-07:00Quick update: Everything is functional. Laser is ...Quick update: Everything is functional. Laser is firing properly. Initially had an issue where the stepper would ONLY go in the X- direction when engraving/cutting. When using the 'move' window in lightburn or protoface it would move appropriately in the negative X direction. The fix was to disable the PWM Fan pin in the config file. The X stepper was on the 2.6 pin and the PWM Fan pin was assigned 2.6. When lightburn turns on the laser it uses M2 and M106 (PWM Fan enable) and to turn the laser off it uses M5 and M107 - Lightburn likely does this to cover all bases, but in my case confused the X- direction. <br /><br />The remaining issue to solve is the stepper moves in both directions at a 2:1 ratio...1mm commanded, it moves 2mm...etc. More to follow. Snuffy39https://www.blogger.com/profile/05421439234583915110noreply@blogger.comtag:blogger.com,1999:blog-247130680149573043.post-73250601880691650632021-02-15T16:13:42.220-08:002021-02-15T16:13:42.220-08:00Minor setback. The hose barbs on the 60W laser tu...Minor setback. The hose barbs on the 60W laser tube are significantly larger (.375 OD) than the OEM tube (.25 OD) so I am going to need new tubing and I'm going to upgrade the cooling pump.Snuffy39https://www.blogger.com/profile/05421439234583915110noreply@blogger.comtag:blogger.com,1999:blog-247130680149573043.post-34532214799791548892021-02-13T16:49:16.286-08:002021-02-13T16:49:16.286-08:00[QUESTION] The original K40 had a ceramic 28K ohm ...[QUESTION] The original K40 had a ceramic 28K ohm resistor between the laser tube cathode and the AMP meter. None of the diagrams I've seen with the HY series power supply show this resistor...should I leave it in the circuit or remove it? I have a picture but I am unable to upload it to the blog.Snuffy39https://www.blogger.com/profile/05421439234583915110noreply@blogger.comtag:blogger.com,1999:blog-247130680149573043.post-52540599638253740522021-02-13T14:40:49.626-08:002021-02-13T14:40:49.626-08:00Don,
Thanks again for your help.
[UPDATE] I now ...Don,<br />Thanks again for your help. <br />[UPDATE] I now have the BT SKR 1.4 Turbo activating the X & Y stepper motors using a version of your config file and the smoothieware firmware. I'm using Prontoface to send the commands to the board.<br />[QUESTION] The SKR Equivalent Circuit shows a 5K POT, am I safe to use a 10K pot? Link:https://www.amazon.com/Taiss-Precision-Potentiometer-Adjustable-3590S-2-502L/dp/B07D7YH9N2?ref_=ast_sto_dp&th=1<br />AtB,<br />Scott<br />PS: I will post my config file (once tested) and any deviation to my build once complete.Snuffy39https://www.blogger.com/profile/05421439234583915110noreply@blogger.com