Start a new topic

strange pattern and wide horizontal bumps


I bought my leapfrog roughly a year ago and had been content with it until recently. Horizontal ribs (4-5mm wide, fraction of a mm high, almost like waves) started appearing on the prints, many times ruining the results if I couldn't grind or sand them away.
The example below was generated in Cura with the following settings:

M201 X1000 Y1000 Z50 E250
M204 S2000.00 T2000.00
M205 S0.00 T0.00 B20000 X15.00 Z0.40 E15.00

-Everything else is factory default, if my memory serves me well. Has anybody experienced anything like this? Read through quite a few forum topics all over the net but couldn't find a proper solution.

Thanks in advance!

(56 KB)
(75.3 KB)

Try using randomized starting points, if your slicer has that option. 

This is just a pattern caused by the extruder. 

I tried that yesterday. The vertical rib (as the layer changes) disappeared, but the main problem remained the same. Out of curiosity, I printed a pipe and these horizontal ribs formed a perfect spiral... Flat, barely noticable when lit perpendicularly to the surface, but as the light source becomes close to tangential, it appears immediately. 

Hmm I remember there being a setting called spiralize which continues the same extrusion width straight up but is only used for hollow objects. 

Try reducing the extrusion multiplier because, on the corners, there is a noticeable over-extrusion. As well, if you're printing with PLA, make sure your fan is working.

Thanks, already tried that. :( Just made the pattern even more visible and the part fragile.


I usually dont go below 0.9 on the multiplier, a small change matters. 

Other things you can try: 

-Different manufacturer of filament (make sure its the diameter) 

I once had a filament that was hollow and didnt notice and this made blotchy prints. 

Bad quality filaments can vary in diameter as well.

-Changing the Steps per E of the extruder. 

This is basically adjusting how much the extruder turns.


Thanks! The latter seems promising.


The pattern that you are seeing I think is an XY resonance, run the appropriate file below. As to the cause you could have changed the platform the printer is sitting on, an x or y motor is not running as smoothly at the speed you are running. There are also inputs in some hosts to specify a resonance for your machine and compensate for it when generating the g code. It is not something I have played with in depth but it might be useful for you.

1 person likes this
Login or Signup to post a comment

Standard Shipping Procedures

Global Shipping Chart

Delivery times Leapfrog

Damaged Shipment Procedures

Order Terms & Conditions

Terms and Conditions

Placing orders on implies consent to abide by the terms and conditions below as well as the terms in our Return Policy.

Price Policy

Pricing on is subject to change without notice. Leapfrog BV reserves the right to correct pricing on items listed incorrectly and to notify the customer prior to shipping of the item of an additional balance due or offer to cancel the order.

Price Change Policy

If an item on is purchased and the price is lowered within 10 days, Leapfrog BV will reimburse the difference in cost to the customer as store credit that will apply to future orders. The customer must request this reimbursement within 7 days of the price change on There will be no cash refunds as part of the price assurance policy.


Estimated Delivery Time

Leapfrog BV guarantees orders received by 10:00am CET will be processed the same day and delivered within 5 business days of the order unless otherwise specified. Business days will be counted starting on the next business day after the order is received. Business days do not include weekends or holidays.

Shipping Costs

Orders shipped from Leapfrog BV warehouses are typically shipped via ground service, but some packages with unique weights and measures will require LTL freight type shipping which can result in additional shipping charges, that are not remarked on your original invoice.

Returns and Exchanges

Orders placed on are considered complete and verified by the customer. There is no guarantee that once an order has been placed that Leapfrog BV will be able to cancel or modify it. If an order needs to be canceled or changed, contact Leapfrog Customer Support immediately by submitting a ticket at Orders that are already listed as “In Shipping” are not able to be changed or canceled and will be subject to our standard Return Policy.

Backordered and Drop-shipped Items


In the event of a backordered item Leapfrog BV will attempt to contact the customer to discuss the issue and options available. Other items on the order will be shipped without delay. If Leapfrog BV is unable to contact the customer about the backordered item, it will be cancelled and the cost of the item refunded to the original payment method. Notification of the cancellation will be sent to the email address listed on the order, provided a valid email address has been given.

Order Return & Exchange Conditions

Order Video Library